options - gs-blog-images.grdp.co
TRANSCRIPT
TOTAL NO OF QUESTIONS : 200
EXAM DATE : 28092016 EXAM NAME : BSNL Online Examination 2016 TOTAL MARKS : 200
Question 1.Pick the Antonym for the word " Urge" Options: a) persue b) deter c) request d) instruct Correct Answer: deter Question 2.Pick the most suitable one word substitute for "Doctor for skin disease" Options: a) Dermatologist b) Cardiologist c) Psychiatrist d) Paediatrician Correct Answer: Dermatologist Question 3.Which of the choices given below should replace the phrase given in bold in the following sentence to make the sentence grammatically meaningful and correct. Sharon made it to work in the nicks of times, or else she would have missed the meeting Options: a) nick of time b) nicked time c) nick and time d) no correction required Correct Answer: nick of time Question 4.Change the following sentences into passive voice : The invigilator was reading out the instructions. Options: a) The instructions were being read out by the invigilator. b) The instructions had been read out by the invigilator. c) The instructions had been read by the invigilator. d) The instructions were read by the invigilator. Correct Answer: The instructions were being read out by the invigilator. Question 5.Find out the correct spelt word from the choices given : Options: a) Embaras b) Embarras c) Embarrass d) Embarrass Correct Answer: Embarrass Question 6.Choose the word which is the exact OPPOSITE of the given words:
EXORBITANT Options: a) barbaric b) famished c) counterfeit d) moderate Correct Answer: moderate Question 7.Choose the appropriate word in the blank from the given alternatives. The box was _____ heavy for that little child to carry. Options: a) very b) too c) enough d) much Correct Answer: too Question 8.Change the direct narration to indirect narration : He said to his father, "Please increase my pocketmoney."
Options: a) He pleaded his father to please increase my pocket money. b) He requested his father to increase his pocketmoney. c) He asked his father to increase his pocketmoney. d) He told his father, "Please increase the pocketmoney" Correct Answer: He requested his father to increase his pocketmoney. Question 9.Select one word which is closest in meaning to the statement in the question : One who is indifferent to all pleasure and pain Options: a) Stern b) Stoic c) Egoistic d) Eccentric Correct Answer: Stoic Question 10.Choose the appropriate options to complete the sentences: What ____________ to Varun? He said he _______________ here at eight o'clock. Options: a) might have happened / will be b) should have happened / has been c) may happen / will have been d) can have happened / would be Correct Answer: can have happened / would be Question 11.The half girl friend book is written by
______ ‰ Options: a) A P J Abdul Kalam ‾ b) Salman Rushidi c) Durjoy Datta ‰ d) Chetan Bhagat Correct Answer: Chetan Bhagat Question 12.Who is the first Indian to become CEO of Google
CEO Options: a) Indra Nooyi b) Sundar Pichai c) Satya Nadella d) Mark Zuckerberg Correct Answer: Sundar Pichai Question 13."Wings of Fire" is an autobiography by which political leader
" " ″ ? Options: a) Fidel Castro b) A P J Abdul Kalam ‾ c) Mahatma Gandhi ″ d) Winston Churchill Correct Answer: A P J Abdul Kalam ‾ Question 14.Which Indian movie has won International Federation of Film Critics award at 68th Cannes festival?
68 ‰ ?
Options: a) Lunch Box b) Masaan c) Piku d) Messenger of God Correct Answer: Masaan Question 15.The Planet which is most near to Sun is:
, : Options: a) Earth b) Mars c) Mercury d) Jupitor Correct Answer: Mercury Question 16.The Ist woman President of United Nations General Assembly was
? Options: a) Margaret Thatcher b) Vijayalakshmi Pandit ′ c) Eleanor Roosvelt d) Srimaro Bandaranaike Correct Answer: Vijayalakshmi Pandit ′ Question 17.The longest dam of India
Options: a) Bhakra Dam b) Nagarjuna Sagar Dam c) Hirakuda dam d) Kosi Dam Correct Answer: Hirakuda dam Question 18.What is the name of the mobile application launched by Telecom Ministry to aid digital literacy ?
Options: a) Arihant b) Rashta c) Disha d) Manzil Correct Answer: Disha Question 19.In National Film Awards, the Nargis Dutt Award is given to:
?
Options: a) A film for wholesome entertainment b) Best film on Natonal Integraton ‰ c) Best Child Film ‰ d) Best film on social issues ‰ Correct Answer: Best film on Natonal Integraton ‰ Question 20.Which of the following is the name of currency of a country
‰ ? Options: a) Peru b) Syria c) Lira d) Zambia ‰ Correct Answer: Lira Question 21.The transfer function of the block diagram of Fig
‰‰ :
Options: a)
Correct Answer:
Question 22.If two lines are perpendicular then the product of their Gradient is
Options: a) 1
b) 1
c) 0
d) None of these Correct Answer: 1 Question 23.
Options: a)
Correct Answer:
Question 24.The Second Order Derivative of a function at Maximum Level is
() Options: a) Constant Value ‰ b) Not related to function ‰‰ c) None of the Above d) Both Constant Value & Not related to function ‰ ‰‰ Correct Answer: None of the Above Question 25.
Options: a) tan1 eπ/4
b) tan eπ/4
c) tan eπ/2
d) none Correct Answer: tan1 eπ/4
Question 26.Find the value of k, if the equation 3x2 +8xy+ky2 = 0 represents perpendicular lines
/ 3x2 +8xy+ky2 = 0 ‰ ' k ' ?
Options: a) 3
b) 3
c) 0
d) 8 Correct Answer: 3 Question 27.The equation of the hyperbola of eccentricity 3 and the distance between whose foci 24 is
() ( ) 3 (foci) 24 () Options: a) x2 8y2 = 128
b) 8x2 y2 = 128
c) 16x2 y2 = 128
d) None Correct Answer: x2 8y2 = 128 Question 28.The point (4,2) lies on a circle. What is the length of the radius of this circle if the center is located at (8,10)?
(4,2) ‰ (8,10) ‰ ? Options: a) √48
b) √80
c) √108
d) √288 Correct Answer: √80 Question 29.Which point satisfies the linear quadratic system y = x + 3 and y = 5 x2?
‰ y = x + 3 y = 5 x2 ? Options: a) (2, 1)
b) (2, 1)
c) (1, 2)
d) (4, 1) Correct Answer: (2, 1) Question 30.Find the slope of a line perpendicular to the line whose equation is 2y + 6x = 24.
2y + 6x = 24 Options: a) 3
b) 6
c) 1/3
d) 1/6 Correct Answer: 1/3 Question 31.Find the midpoint of the segment connecting the points (a, b) and (5a, 7b).
(a, b) (5a, 7b) Options: a) (3a, 3b)
b) (2a, 3b)
c) (3a, 4b)
d) (2a, 4b) Correct Answer: (3a, 3b) Question 32.Which of the following is TRUE regarding the graphs of the equations of a linear quadratic system?
‰ ?
Options: a) the graphs may intersect in two locations. b) the graphs may intersect in one location. c) the graphs may not intersect. d) all three choices are true. Correct Answer: all three choices are true. Question 33.A lawn service company offers services within an 20 mile radius of their office. When the service area is represented graphically with the office located at (0,0), the equation that represents the service area is:
20 (0,0) : Options: a) x2 + y2 = 20
b) x2 + y2 = 40
c) x2 + y2 = 400
d) x2 + y2 = 4000 Correct Answer: x2 + y2 = 400 Question 34.Mathematically, what is a differential?
, ? Options: a) A gear box on the back end of your car. b) A word used a lot on a popular medical television series. ‾ c) A method of directly relating how changes in an independent variable affect changes in a dependent variable. , d) A method of directly relating how changes in a dependent variable affect changes in an independent variable. , Correct Answer: A method of directly relating how changes in an independent variable affect changes in a dependent variable. , Question 35.At what value of q is the concavity of w(q) = 2, if w(q) = q4 16?
w(q) = q4 16, w w(q) = 2 ? Options: a) At q = fourth root of 14. q = 14 b) At q = 0. q=0 c) Never w(q) is always concave down. , w(q) d) Never w(q) is always concave up. , w(q) Correct Answer: Never w(q) is always concave up. , w(q) Question 36.What is needed to fully determine an antidifferentiated function?
? Options: a) A lot of luck. b) A boundary condition. c) What its value is at (0, 0). (0,0) d) Its real world application. Correct Answer: A boundary condition. Question 37.Let ƒ:X → Y be an onetoone map. Then which of the following is not correct?
ƒ:X → Y ‰ :
Options: a) X may be a subset of Y X, Y b) Y may be a subset of X Y, X c) X should be equal to Y X, Y d) cardinality of X should be equal to cardinality of Y X Y Correct Answer: X should be equal to Y X, Y Question 38.ion of the partial differential equation yzp+zxq=xy is given by
yzp+zxq=xy Options: a) x2+y2=c1 and x2+z2=c2
b) x2y2=c1 and x2z2=c2
c) x2+y2=c1 and x2z2=c2
d) x2y2=c1 and x2+z2=c2 Correct Answer: x2y2=c1 and x2z2=c2 Question 39.The dimension for Torque are
Options: a) M2L2T2
b) ML2T2
c) ML2T1
d) M2L2T1
Question 40.Sound wave is a good example of
‾ Options: a) transverse waves b) longitudinal waves c) both transverse and longitudinal waves d) none of these Correct Answer: longitudinal waves Question 41.Which of the following are the characteristics of LASER beam a) Directionality b) Coherence c) Monochromaticity
a) b) c) Options: a) a & b only a & b b) a & c only a & c c) b & c only b & c d) a, b & c a, b & c Correct Answer: a, b & c a, b & c Question 42.A Qmeter uses the principle of
Q _____________
Options: a) variation of self inductance ‰ b) variation of mutual inductance ‰ c) series resonance d) None of these Correct Answer: series resonance Question 43.Two sources are said to be coherent if their emitted waves have
‰ : Options: a) same amplitude b) same wavelength c) constant phase difference d) All of these Correct Answer: All of these Question 44.There are eight images of a candle which is kept in between two plane mirrors. The angle of inclination of the plane mirror is
. . Options: a) 60°
b) 90°
c) 40°
d) 45° Correct Answer: 40° Question 45.Unit of Intensity of magnetic induction field is
: Options: a) N/Am
b) Tesla c) Wb/m2
d) All of these Correct Answer: All of these Question 46.105 Fermi is equal to
105 : Options: a) 1 meter 1 b) 100 micron 100 c) 1 angstrom unit 1 d) 1 mm 1 Correct Answer: 1 angstrom unit 1 Question 47.Which of the following is Unit of length?
‰ ?
Options: a) Lunar Month b) Kelvin ‰ c) candela d) Light year Correct Answer: Light year Question 48.Metals can ________ the light beams.
______________ Options: a) Reflect b) Refract c) Transmit d) Any Correct Answer: Reflect Question 49.Metals can transmit these ____.
____________ Options: a) Radio ways b) Visible light ‾ c) Microwaves d) xrays x Correct Answer: xrays x Question 50.Snell's law relates ____________.
____________ ‰‰ Options: a) Light relfection b) Light refraction c) Light transmission d) Light Absorption Correct Answer: Light refraction Question 51.Multiple reflections are called
: Options: a) reverberations b) refraction c) echo d) compressions Correct Answer: reverberations Question 52.Sum of protons and neutrons in an atom gives off
_________
Options: a) nucleon number ‰ b) mass number c) atomic number d) both nucleon number and mass number ‰ Correct Answer: both nucleon number and mass number ‰ Question 53.Hydrogen atom has an approximate diameter of
________ Options: a) 109m
b) 1010m
c) 910m
d) 1011m Correct Answer: 109m Question 54.Elements which have same number of protons but different number of neutrons are called as
, : Options: a) isotopes b) isomers c) allotropes d) allomers Correct Answer: isotopes Question 55.Proton number is denoted by symbol
: Options: a) A
b) Z
c) P
d) N Correct Answer: Z Question 56.An electron can never be found inside nucleus', this statement is according to
‰ ‰ ___________ Options: a) Heisenberg uncertainty principle b) Bernoulli's equation c) bohrs model d) both Heisenberg uncertainty principle and Bernoulli's equation Correct Answer: Heisenberg uncertainty principle Question 57.For an RLC circuit, R= 20 Ω, L= 0.6 H, the value of C (in mF) for Critically damped, overdamped, under damped condition respectively will be
RLC R= 20 Ω, L= 0.6 H. , C (mF ) Options: a) 6, >6, <6
b) 6, <6, >6
c) >6, 6, <6
Question 58.
Options: a) RL impedance function RL b) RL admittance function RL c) LC impedane function LC d) LC admittane function LC Correct Answer: RL impedance function RL Question 59.A 12 mA current source has an internal resistance, RS of 1.2 kΩ. The equivalent voltage source is
12 mA RS 1.2 kΩ Options: a) 1.44 V
b) 14.4 V
c) 7.2 V
d) 72 mV Correct Answer: 14.4 V Question 60.The equivalent inductance is between I and I' is
I I' ‰
Options: a) L1 + L2
c) L1 + L2 +2M
d) L1 + L2 2M Correct Answer: L1 + L2 +2M Question 61.The ratio of r.m.s value to average value is called
: Options: a) amplitude factor b) form factor c) crest factor d) peak factor Correct Answer: form factor Question 62.Given two coupled inductors L1 and L2, their mutual inductance M satisfies
‰ ‰ L1 L2 ‰ :
Options: a)
Correct Answer:
Question 63.When the relative permeability of a meterial is slightly less than 1, is called a
1 , , Options: a) diamagnetic material b) paramagnetic material c) ferromagnetic material d) None of these Correct Answer: diamagnetic material Question 64.Capacitance of a network can be increased by putting
Options: a) Capacitor in Series b) Capacitor in Parallel c) Capacitor Anywhere in the network d) Putting Resistor in Series Correct Answer: Capacitor in Parallel Question 65.In Thevenin's Model the Resistance Rth is defined as
(Thevenin's Model) Rth Options: a) Open circuit impedance between two points b) Close Circuit impedance between two points c) Impedance calculated by replacing voltage/ current source with their impedance / d) None of these Correct Answer: Impedance calculated by replacing voltage/ current source with their impedance / Question 66.The conductor used for High Quality surface to surface contacts is
Options: a) Silver b) Copper c) Aluminium d) Gold
Correct Answer: Gold Question 67.A circuit component that opposes the change in circuit voltage is
: Options: a) resistance b) capacitance c) inductance ‰ d) All of these Correct Answer: capacitance Question 68.In an RL series circuit, the power factor is
RL ‰ : Options: a) leading b) lagging c) zero d) unity Correct Answer: lagging Question 69.If the atomic number of germanium is 32, the number of electrons in the outer most shell will be
32 ‰ : Options: a) 2
b) 3
c) 4
d) 6 Correct Answer: 4 Question 70.The Ohm's law for magnetic circuit is
: Options: a) reluctance = flux/mmf
b) mmf=reluctance
c) mmf = flux/reluctance
d) mmf=flux x reluctance Correct Answer: mmf=reluctance Question 71.The major drawback of a primary cell is that
Options: a) chemical action is not reversible b) chemical action is reversible c) electrolyte used is very costly ‰ d) not portable Correct Answer: electrolyte used is very costly ‰ Question 72.The current in capacitive circuits _______ the voltage
‰ ,
Options: a) Lags b) Leads c) Inphase with d) None of these Correct Answer: Leads Question 73.The relative permiabilty μr is given by
μr Options: a) B / μo . H
b) B/H
c) H/B
d) None Correct Answer: B / μo . H Question 74.In a transformer, the ratio of primary to secondary is 9:4. If power input is P, what will be the ratio of power output to the power input
9:4 . ‰ (Power) P ‰ ‰ ? Options: a) 4:9
b) 9:4
c) 5:4
d) 1:1 Correct Answer: 1:1 Question 75.The ________ is defined as the time the output is active divided by the total period of the output signal.
________ Options: a) on time b) off time c) duty cycle d) active ratio Correct Answer: duty cycle Question 76.The operation of a JFET involves
JFET ‰ : Options: a) A flow of minority carriers b) A flow of majority carriers c) Recombination d) Negative Resistance ″ Correct Answer: A flow of majority carriers Question 77.A BJT is a ________controlled device and the JFET is a ________ controlled device
__________ JFET ___________
Options: a) voltage, voltage , b) voltage, current , c) current, voltage , d) current, current , Correct Answer: current, voltage , Question 78.An astable 555 timer has the following number of stable states
555 ‰ : Options: a) 0
b) 1
c) 2
d) 3 Correct Answer: 0 Question 79.The impurity commonly used for realizing the base region of a silicon NPN transistor is
NPN : Options: a) Silicon b) Antimony c) Germanium d) Boron Correct Answer: Boron Question 80.When a transistor is fully switched ON, it is said to be
: ON , Options: a) shorted b) saturated c) open d) cutoff Correct Answer: saturated Question 81.The positive swing of the output signal in a transistor circuit starts clipping first when Qpoint of the circuit moves
‰ ‰ QPoint Options: a) to the centre of the load line b) twothird way up the load line c) towards the saturation point d) towards the cutoff point Correct Answer: towards the cutoff point Question 82.The common mode ratio of an ideal diffamp is
diffamp
Options: a) zero b) infinity c) less than unity d) greater than unity Correct Answer: infinity Question 83.The leakage current of a PN diode is cuased by
PN Options: a) heat energy b) chemical energy c) barrier potential (barrier potential) d) majority carriers Correct Answer: heat energy Question 84.Which of the following is Primary memory
‰ ? Options: a) Hard disk b) Pen Drive c) On Board Memory d) None of these Correct Answer: On Board Memory Question 85.Common Emitter Amplifier is also known as
Options: a) Current Amplifier b) Voltage Amplifier c) Power Amplifier ‰ d) Frequency Modulator Correct Answer: Voltage Amplifier Question 86.Which of the following Biasing is mostly used for BJT
‰ BJT Options: a) Fixed Biasing b) Voltage Divider c) Collector to Base Biasing ‰ d) Fixed Biasing with Emitter Resistance Correct Answer: Voltage Divider Question 87.In a classB amplifier the output current flows for ______
‰ .
Options: a) 90°
b) 180°
c) More than 180° and less than 270° 180° 270° d) 360° Correct Answer: 180° Question 88.In a multistage amplifier, the intermediate stages are always in
, _________ Options: a) CB configuration CB ‰ b) CE configuration CE ‰ c) CC configuration CC ‰ d) may have any configuration ‰ Correct Answer: CE configuration CE ‰ Question 89.At resonance, the impedance of a parallel tuned circuit formed by capacitor C (lossless) and inductor L (with series resistance R) approximately equals
, C () ‰ L ( R ) _________ Options: a) L/CR
b) LC/R
c) LR/C
d) 1/LCR Correct Answer: L/CR Question 90.The class B pushpull circuit can deliver 100 W ac output power. What should be the minimum power rating of each transistor?
B 100 w ? Options: a) 20 W
b) 40 W
c) 10 W
d) 80 W Correct Answer: 20 W Question 91.A relay is
: Options: a) A mechanical switch ‰ b) An electronic switch ‰ ‰ c) An electromechanical switch ‰ d) none of these Correct Answer: An electromechanical switch ‰ Question 92.The dc resistance of a crystal diode is ________ its ac resistance
, ____________ Options: a) the same as b) more than c) less than d) none of these Correct Answer: less than
Question 93.In the logic circuit of fig. the redundant gate is
?
Options: a) 1
d) 4 Correct Answer: 2 Question 94.Three Boolean opertors are
: Options: a) NOT, OR,AND
b) NOT, NAND, OR
c) NOR, OR, NOT
d) NOR, NAND, NOT Correct Answer: NOT, OR,AND Question 95.The full adder can be made out of
Options: a) Two Halfadders b) Two Halfadders and a NOT gate NOT c) Two Halfadders and an AND gate AND d) Two Halfadders and an OR gate OR Correct Answer: Two Halfadders and an OR gate OR Question 96.Sampleandhold circuits in analogto digital converters (ADCs) are designed to:
(ADCs) : Options: a) sample and hold the output of the binary counter during the conversion process b) stabilize the comparator's threshold voltage during the conversion process ‰ c) stabilize the input analog signal during the conversion process ‰ d) sample and hold the D/A converter staircase waveform during the conversion process / Correct Answer: stabilize the input analog signal during the conversion process ‰ Question 97.One application of a digital multiplexer is to facilitate:
_________ Options: a) Serialtoparallel conversion b) Data generation c) Parity checking d) Data selector ‰
Correct Answer: Data selector ‰ Question 98.The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?
A = 1100 B = 1001 ? Options: a) A > B = 1, A < B = 0, A < B = 1
b) A > B = 0, A < B = 1, A = B = 0
c) A > B = 1, A < B = 0, A = B = 0
d) A > B = 0, A < B = 1, A = B = 1 Correct Answer: A > B = 1, A < B = 0, A = B = 0 Question 99.LCDs have response time of the order of
LCDs Options: a) is few ns ns b) tens of ns ns c) a few milliseconds d) hundred of milliseconds Correct Answer: hundred of milliseconds Question 100.Popular application of flipflop are
‰‰ ‰ : Options: a) counters b) shift registers c) transfer register d) all of these Correct Answer: all of these Question 101.The process of deliberately adding impurity to a semiconductor material is called
? Options: a) impurification ‰‰ b) pollution c) deionisation d) doping Correct Answer: doping Question 102.Which of the following is a unit of memory
‰ ? Options: a) RAM
b) KB
c) Bit
d) Byte Correct Answer: RAM Question 103.Binary numbers can be converted into Hexadecimal numbers by grouping bits into group of ____ starting from _________and represented each group as Hexadecimal number
, .
Options: a) Three bits, Right Most bit , b) Three bits, Left Most bit , c) Four bits, Right Most bit , d) Sixteen bits, Left Most bit , Correct Answer: Four bits, Right Most bit , Question 104.A 'n' bit flash type ADC requires maximum of ______ to complete conversion
'n' ‰ . Options: a) "n" Clock pulses "n" b) "2n+1" Clock pulses "2n+1" c) one clock pulse d) "2n1" Clock pulses "2n1" Correct Answer: one clock pulse Question 105.Race around condition occur in JK Flip Flop is due to
.. ‰‰‰ ‰ Options: a) The clock time period is less than propagation delay b) The clock time period is greater than propagation delay c) Due to triggering d) None Correct Answer: The clock time period is greater than propagation delay Question 106.Divide by 78 counter can be realized using
78 . Options: a) 6 number of mod13 counters 13 6 b) 13 number of mod6 counters 6 13 c) 13 number of mod13 counters 13 13 d) one mod13 counter followed by one mod6 counter 13 6 Correct Answer: one mod13 counter followed by one mod6 counter 13 6 Question 107.The circuit used for parallel to serial conversion of data is known as
Options: a) decoder b) demultiplexer c) multivibrator d) multiplexer Correct Answer: multiplexer Question 108.MOS logic gates have no current hogging problem because the gate terminal has
MOS _____________
Options: a) low input impedance b) zero impedance c) compensating effect d) high impedance Correct Answer: compensating effect Question 109.A flipflop can store
‰‰ ‰ __________ Options: a) 1 bit of data 1 b) 2 bits of data 2 c) 3 bits of data 3 d) 4 bits of data 4 Correct Answer: 4 bits of data 4 Question 110.Which one of the logic families has maximum fanout capacity?
‰ ? Options: a) RTL
b) ECL
c) MOS
d) CMOS Correct Answer: CMOS Question 111.The speed of a motor generator set consisting of 6pole induction motor and a 4pole dc generator fed from a 3 phase 50 Hz supply is _____________ rpm.
6 4 3 – 50 Hz ________ rpm Options: a) 1000
b) 600
c) 1500
d) 3000 Correct Answer: 600 Question 112.A rotary converter generally
Options: a) Combines the function of an induction motor and a dc generator b) Has a set of slip rings at both ends c) Has one armature and 2 fields d) Is a synchronous motor and a dc generator combined Correct Answer: Is a synchronous motor and a dc generator combined Question 113.In a 3phase, 3wire unbalanced load, power cannot be measured by two wattmeters
3 , 3 , ‰ Options: a) TRUE b) FALSE c) Cannot be said d) None of these
Correct Answer: FALSE Question 114.The insulation resistance test is performed with
_____________ Options: a) Ohmmeter b) Megger c) Earth Tester d) Wheaston Bridge Correct Answer: Megger Question 115.In case of Circuit Breakers if the length of arc increases, its resistance is
, : Options: a) decreases b) increases c) remain same d) some times increases or decreases Correct Answer: increases Question 116.One ton of refrigeration (1 TR) means that the heat removing capacity is
(1TR) _______ Options: a) 21kJ/min
b) 210kJ/min
c) 420kJ/min
d) 210kJ/sec Correct Answer: 210kJ/min Question 117.Load saturation characteristics of a DC generator gives relation between
DC ‰ Options: a) V and Ia V Ia b) E and Ia E Ia c) Eo and If Eo If d) V and If V If Correct Answer: V and If V If Question 118.Charger used to charge the Batteries of Car are
Options: a) Fast Chargers b) Trickle Chargers c) Pulse chargers d) Inductive chargers ‰‰ Correct Answer: Pulse chargers Question 119.In a 3 Φ phase balance star connected load, if one of the supply phases gets broken, the phase current & line current will become______________ & ____________times to the preveious value respectively
3 Φ ________ _________ :
Options: a) 1,1/√3
c) 2/√3, 2/√33
d) √3/2, √33/2 Correct Answer: √3/2, √33/2 Question 120.In a d.c. generator the generated e.m.f. is directly proportional to the ______________
‾ _______________ Options: a) field current b) number of armature parallel paths c) number of dummy coils d) pole flux ‰ Correct Answer: pole flux ‰ Question 121.In a d.c. motor which of the following can sustain the maximum temperature rise ?
‰ ‰ ? Options: a) armature winding b) field winding c) commutator d) slip ring Correct Answer: field winding Question 122.The brushes in d.c. machines are made of carbon
Options: a) to reduce the size of brushes b) to reduce the wear and tear of commutator c) to increase the efficiency of the commutator d) None of these Correct Answer: to reduce the wear and tear of commutator Question 123.Transmission lines are generally operated at
: Options: a) 132 KV to 220 KV 132 220 b) 30 KV to 66 KV 30 66 c) upto 11 KV only 11 d) 0.415 KV to 11 KV 0.415 11 Correct Answer: 30 KV to 66 KV 30 66 Question 124.When Microwave signals follow the curvature of the earth, this is known as
,
Options: a) the Faraday effect b) ducting c) tropospheric scatter ‰ d) ionospheric reflection ‰ Correct Answer: ducting Question 125.In an FM system, if modulating voltage is constant and modulation frequency is lowered
FM ‰ Options: a) Relative amplitude of distant sidebands increases b) Relative amplitude of distant sidebands decreases c) frequency deviation increases d) frequency deviation decreases Correct Answer: Relative amplitude of distant sidebands increases Question 126.In a circular waveguide the dominant mode is
Options: a) TE01
b) TE11
c) TE20
d) TE21 Correct Answer: TE11 Question 127.The modulation index of an FM signal, having a carrier swing of 100 KHZ with modulation signal frequency is 8 KHZ is
FM , 8 KHz ‰ 100 KHz , : Options: a) 6.25
b) 12.5
c) 16.8
d) 2.85 Correct Answer: 12.5 Question 128.Data rate supported by Standard Ethernet is
__________ Options: a) 10 Mbps
b) 100 Mbps
c) 1000 Mbps
d) 10 Gbps Correct Answer: 10 Mbps Question 129.The number of channels available in MF band (300 kHz 3 MHz) for AM modulating signal of 20 kHz is
20 kHz AM MF (300 kHz 3 MHz) Options: a) 135
b) 67
c) 150
d) 15 Correct Answer: 67
Question 130.In PCM, if the number of quantization levels is increased from 4 to 64, then the bandwidth requirement will approximately be increased __________ times
PCM , 4 64 , _________ Options: a) 8
b) 16
c) 32
d) 3 Correct Answer: 3 Question 131.The intermediate frequency of a superhet receiver in 450 KHz. If it is tuned to 1200 KHz, the image frequency will be
450 KHz 1200 KHz ___________ Options: a) 750 KHz
b) 900 KHz
c) 1650 KHz
d) 2100 KHz Correct Answer: 2100 KHz Question 132.The thermal noise is due to random ______________
_______________ Options: a) motion of atoms and molecules b) vibration of atoms about their mean position inside the conducting medium c) motion of free electrons ‰ d) none of these Correct Answer: motion of free electrons ‰ Question 133.The height of the transmitting antenna is 225 m above ground level, its radio horizon will be ______________
225 _____________ Options: a) 120 Km
b) 76 Km
c) 60 Km
d) 225 Km Correct Answer: 60 Km Question 134.In radio receivers tube EM 84 is used as _______________
EM 84 _____________ Options: a) magic eye b) full wave rectifier c) audio amplifier d) none of these Correct Answer: magic eye Question 135.A transmission line has a VSWR of 2, the reflection coefficient is __________
VSWR 2 ______________ Options: a) 0
b) 0.25
c) 0.333333333333333
d) 0.5
Correct Answer: 0.333333333333333 Question 136.Sound loudness is represented by
: Options: a) Frequency of sound signal b) Magnitude of sound signal c) both frequency and magnitude of sound signal d) Phase difference of the signal Correct Answer: both frequency and magnitude of sound signal Question 137.Which of the following is incorrect?
? Options: a) SWR is a measure of mismatch between the load and the line SWR b) When a complex load is connected to a transmission line, standing waves result even if magnitude of load impedance is equal to characteristic impedance of line. ‾ c) A short circuited line less than λ/4 long behaves as a pure inductance λ/4 d) None of these Correct Answer: None of these Question 138.The voltage wave in a lossless transmission line has the maximum magnitude of 6 volt and minimum magnitude of 2.4 volt. The reflection coefficient of the transmission line is
6 2.4 Options: a) 0.43
b) 2.33
c) 1.4
d) 0.71 Correct Answer: 0.43 Question 139.A transmission line is distortionless if
Options: a) RL = 1/GC
b) RL = GC
c) LG = RC
d) RG = LC Correct Answer: LG = RC Question 140.A transmission line has the characteristic impedance Z0 and the voltage standing wave ratio is S . The line impedance on the transmission line at voltage maximum and minimum are respectively
Z0 VSWR S Options: a) Z0S, Z0/S
b) Z0/S, Z0S
c) Z0S, Z0S
d) Z0/S, Z0/S Correct Answer: Z0S, Z0S Question 141.If a transmission line of length less than λ / 4 is short circuited, it behaves as
λ / 4 :
Options: a) Pure capacitive reactance b) Pure inductive reactance. ‰‰ c) Parallel resonant circuit d) Series resonant circuit. Correct Answer: Pure inductive reactance. ‰‰ Question 142.A two port network is symmetrical if
Options: a) A'=B'
b) B'=C'
c) A'C'=B'D'
d) A'=D' Correct Answer: A'=D' Question 143.A transducer converts
Options: a) mechanical energy into electrical energy b) mechanichal displacement into electrical signal c) one form of energy into another form of energy d) electrical energy into mechanical form Correct Answer: one form of energy into another form of energy Question 144.For higher Voltage three phase transmission
Options: a) Thick Neutral Wire is used b) Thin Neutral Wire is used c) No Neutral wire is used d) None of these Correct Answer: No Neutral wire is used Question 145.The Length of IP Address in IPV6 is
IPV6 IP Options: a) 128 Bits 128 b) 256 Biits 256 c) 64 Bits 64 d) 32 Bits 32 Correct Answer: 128 Bits 128 Question 146.High pass T Filter has
T
Options: a) Low input impedance at low frequencies b) High input impedance at high frequencies c) High output impedance at low frequencies d) Low input impedance at high frequencies Correct Answer: Low input impedance at high frequencies Question 147.Which of the following expression shows correct function for 'Y' parameter in a two port network?
Y ? Options: a) (V1,V2)=f(I1, I2)
b) I1, I2)=f(V1,V2)
c) (V1,I1)=f(V2 I2)
d) (V1,I2)=f(I1, V2) Correct Answer: I1, I2)=f(V1,V2) Question 148.For a two port reciprocal network , the three transmission parameters are given by, A=3/5, B=7/5, C=4/5, what is the value of D?
, , A=3/5, B=7/5, C=4/5 , D ______________ Options: a) 1
b) 3/5
c) 53/15
d) 1/2 Correct Answer: 53/15 Question 149.Effective impedance in parallel resonance is given by
: Options: a) R
b) L/RC
c) C/LR
d) LC/R Correct Answer: L/RC Question 150.Kelvin's double bridge is used to measure low resistances because
‰ ( ) Options: a) it has high sensitivity ′ b) there is no thermoelectric emf ‰‰‰ c) resistance variation due to temperature d) effect of contact and lead resistances is eliminated Correct Answer: effect of contact and lead resistances is eliminated Question 151.A substance that changes its MB_Electrical resistance when light falls on it, is known as
: Options: a) Photo Voltaic substance b) Photo conductive substance ‰‰ c) Both d) None of these Correct Answer: Photo conductive substance ‰‰
Question 152.Which of the following is true?
‰ ? Options: a) Accuracy can be achieved without precision , , b) Precision can be without accuracy , c) Both Accuracy can be achieved without precision & Precision can be without accuracy , , , d) None of these Correct Answer: Precision can be without accuracy , Question 153.A set of readings has a wide range and therefore it has ______
______________ Options: a) high precision b) high accuracy c) low accuracy d) low precision Correct Answer: low precision Question 154.A volt meter has a resistance of 2000Ω, When it is connected across a d.c. circuit its power consumption is 2 MW. Suppose this voltmeter is replaced by a voltmeter of 4000Ω resistance, the power consumption will be
2000Ω ‰ 2mw 4000Ω ‰ ______ Options: a) 4 mw 4 b) 1mw 1 c) 2 mw 2 d) none of these Correct Answer: 1mw 1 Question 155.Which one of the following is an active transdeucer?
‰ ______________ ? Options: a) Strain guage b) Selsyn c) Photovotaic cell d) Photo emissive cell ‰ Correct Answer: Photovotaic cell Question 156.Pirani gauge is useful for measurement of pressure between __________
____________ Options: a) 101 to 103 mm of Hg
b) 101 to 106 mm of Hg
c) 101 to 109 mm of Hg
d) 101 to 1012 mm of Hg Correct Answer: 101 to 103 mm of Hg Question 157.When an amplifier is overdriven and clips the input signal, the type of distortion occurs is _______________
‰ _______________
Options: a) frequency distrotion b) amplitude distrotion c) phase distortion d) crossover distrotion Correct Answer: amplitude distrotion Question 158.A voltage using a 20 micro Amp meter movement has a sensitivity of
20 Options: a) 20 micro ohm/volt 200 / b) 1000 ohm/volt 1000 / c) 20,000 ohm/volt 20000 / d) 50,000 ohm/volt 50000 / Correct Answer: 20,000 ohm/volt 20000 / Question 159.Lissajons pattern can be used for determining
___________ Options: a) Voltage amplitude b) Amplitude distortion c) Frequency distortion d) Phase shift Correct Answer: Frequency distortion Question 160.The connecting probe in CRO causes
: Options: a) loading b) distortion in the wave c) loading and distortion in the wave both d) None of these Correct Answer: distortion in the wave Question 161.Energy meter is a
___________ Options: a) recording instrument b) integrating instrument c) indicating instrument d) none of these Correct Answer: integrating instrument Question 162.The pressure coil of an energy meter has
_____________
Options: a) few turns of thin wire b) few turns of thick wire c) many turns of thin wire d) many turns of thick wire Correct Answer: many turns of thin wire Question 163. The root locus plot for a system is given below. The open loop transfer function G(s)H(s) corresponding to this plot is given by
G(s)H(s)
Options: a)
Correct Answer:
Question 164.A system with gain margin close to unity or a phase margin close to zero is
_______________ Options: a) highly stable. b) oscillatory. c) relatively stable. ‰‰ d) unstable. Correct Answer: relatively stable. ‰‰ Question 165.
Options: a) Type 0, Order 1 0, 1 b) Type 0, Order 2 0, 2 c) Type 1, Order 1 1, 1 d) Type 1, Order 0 1, 0
Correct Answer: Type 0, Order 2 0, 2 Question 166.The frequency at which the magnitude of the open loop transfer function is unity
‰‰ : Options: a) gain cross over frequency b) phase cross over frequency c) corner frequency d) phase frequency Correct Answer: gain cross over frequency Question 167.In an open loop control system
Options: a) control action is independent of the output ‰‰ b) control action depends on human judgement ‰‰ c) internal system changes are automatically taken care of d) both control action is independent of the output and control action depends on human judgement ‰‰ ‰‰ Correct Answer: both control action is independent of the output and control action depends on human judgement ‰‰ ‰‰ Question 168.In a closed loop control system
′ Options: a) control action depends on the output and also on the input command ‰‰ b) output signal is feedback to be compared with the reference signal c) the accuracy is better than in open loop system d) All of these Correct Answer: All of these Question 169.The unity circle of Nyquist plot corresponds to the 0db line for the Bode plot for ___________
______________ Options: a) high frequencies b) low frequencies c) medium frequencies d) all frequencies Correct Answer: all frequencies Question 170.The medium in pneumatic system is ____________
______________ Options: a) liquied b) helium c) oil d) air Correct Answer: liquied
Question 171.The node in the signal flow graph performs
: Options: a) Addition of signals from all incoming branches only b) Transmitting sum of all incoming signals to outgoing branches c) All of these d) None of these Correct Answer: None of these Question 172.The transfer function of a system is used to calculate ___
‰‰ _____________ Options: a) Type of the system b) The output for a given input c) Time constant ‰ d) None of these Correct Answer: The output for a given input Question 173.Nyquist stability test is a graphical method and its advantages are
Options: a) Applicable to experimental results or frequency response of open loop system b) Closed loop stability can be predicted from open loop results ′ ‰ c) It indicates how to stabilize an unstable system d) All of these Correct Answer: Applicable to experimental results or frequency response of open loop system Question 174.A servo system is absolutely unstable if
: Options: a) There are no stable compon
EXAM DATE : 28092016 EXAM NAME : BSNL Online Examination 2016 TOTAL MARKS : 200
Question 1.Pick the Antonym for the word " Urge" Options: a) persue b) deter c) request d) instruct Correct Answer: deter Question 2.Pick the most suitable one word substitute for "Doctor for skin disease" Options: a) Dermatologist b) Cardiologist c) Psychiatrist d) Paediatrician Correct Answer: Dermatologist Question 3.Which of the choices given below should replace the phrase given in bold in the following sentence to make the sentence grammatically meaningful and correct. Sharon made it to work in the nicks of times, or else she would have missed the meeting Options: a) nick of time b) nicked time c) nick and time d) no correction required Correct Answer: nick of time Question 4.Change the following sentences into passive voice : The invigilator was reading out the instructions. Options: a) The instructions were being read out by the invigilator. b) The instructions had been read out by the invigilator. c) The instructions had been read by the invigilator. d) The instructions were read by the invigilator. Correct Answer: The instructions were being read out by the invigilator. Question 5.Find out the correct spelt word from the choices given : Options: a) Embaras b) Embarras c) Embarrass d) Embarrass Correct Answer: Embarrass Question 6.Choose the word which is the exact OPPOSITE of the given words:
EXORBITANT Options: a) barbaric b) famished c) counterfeit d) moderate Correct Answer: moderate Question 7.Choose the appropriate word in the blank from the given alternatives. The box was _____ heavy for that little child to carry. Options: a) very b) too c) enough d) much Correct Answer: too Question 8.Change the direct narration to indirect narration : He said to his father, "Please increase my pocketmoney."
Options: a) He pleaded his father to please increase my pocket money. b) He requested his father to increase his pocketmoney. c) He asked his father to increase his pocketmoney. d) He told his father, "Please increase the pocketmoney" Correct Answer: He requested his father to increase his pocketmoney. Question 9.Select one word which is closest in meaning to the statement in the question : One who is indifferent to all pleasure and pain Options: a) Stern b) Stoic c) Egoistic d) Eccentric Correct Answer: Stoic Question 10.Choose the appropriate options to complete the sentences: What ____________ to Varun? He said he _______________ here at eight o'clock. Options: a) might have happened / will be b) should have happened / has been c) may happen / will have been d) can have happened / would be Correct Answer: can have happened / would be Question 11.The half girl friend book is written by
______ ‰ Options: a) A P J Abdul Kalam ‾ b) Salman Rushidi c) Durjoy Datta ‰ d) Chetan Bhagat Correct Answer: Chetan Bhagat Question 12.Who is the first Indian to become CEO of Google
CEO Options: a) Indra Nooyi b) Sundar Pichai c) Satya Nadella d) Mark Zuckerberg Correct Answer: Sundar Pichai Question 13."Wings of Fire" is an autobiography by which political leader
" " ″ ? Options: a) Fidel Castro b) A P J Abdul Kalam ‾ c) Mahatma Gandhi ″ d) Winston Churchill Correct Answer: A P J Abdul Kalam ‾ Question 14.Which Indian movie has won International Federation of Film Critics award at 68th Cannes festival?
68 ‰ ?
Options: a) Lunch Box b) Masaan c) Piku d) Messenger of God Correct Answer: Masaan Question 15.The Planet which is most near to Sun is:
, : Options: a) Earth b) Mars c) Mercury d) Jupitor Correct Answer: Mercury Question 16.The Ist woman President of United Nations General Assembly was
? Options: a) Margaret Thatcher b) Vijayalakshmi Pandit ′ c) Eleanor Roosvelt d) Srimaro Bandaranaike Correct Answer: Vijayalakshmi Pandit ′ Question 17.The longest dam of India
Options: a) Bhakra Dam b) Nagarjuna Sagar Dam c) Hirakuda dam d) Kosi Dam Correct Answer: Hirakuda dam Question 18.What is the name of the mobile application launched by Telecom Ministry to aid digital literacy ?
Options: a) Arihant b) Rashta c) Disha d) Manzil Correct Answer: Disha Question 19.In National Film Awards, the Nargis Dutt Award is given to:
?
Options: a) A film for wholesome entertainment b) Best film on Natonal Integraton ‰ c) Best Child Film ‰ d) Best film on social issues ‰ Correct Answer: Best film on Natonal Integraton ‰ Question 20.Which of the following is the name of currency of a country
‰ ? Options: a) Peru b) Syria c) Lira d) Zambia ‰ Correct Answer: Lira Question 21.The transfer function of the block diagram of Fig
‰‰ :
Options: a)
Correct Answer:
Question 22.If two lines are perpendicular then the product of their Gradient is
Options: a) 1
b) 1
c) 0
d) None of these Correct Answer: 1 Question 23.
Options: a)
Correct Answer:
Question 24.The Second Order Derivative of a function at Maximum Level is
() Options: a) Constant Value ‰ b) Not related to function ‰‰ c) None of the Above d) Both Constant Value & Not related to function ‰ ‰‰ Correct Answer: None of the Above Question 25.
Options: a) tan1 eπ/4
b) tan eπ/4
c) tan eπ/2
d) none Correct Answer: tan1 eπ/4
Question 26.Find the value of k, if the equation 3x2 +8xy+ky2 = 0 represents perpendicular lines
/ 3x2 +8xy+ky2 = 0 ‰ ' k ' ?
Options: a) 3
b) 3
c) 0
d) 8 Correct Answer: 3 Question 27.The equation of the hyperbola of eccentricity 3 and the distance between whose foci 24 is
() ( ) 3 (foci) 24 () Options: a) x2 8y2 = 128
b) 8x2 y2 = 128
c) 16x2 y2 = 128
d) None Correct Answer: x2 8y2 = 128 Question 28.The point (4,2) lies on a circle. What is the length of the radius of this circle if the center is located at (8,10)?
(4,2) ‰ (8,10) ‰ ? Options: a) √48
b) √80
c) √108
d) √288 Correct Answer: √80 Question 29.Which point satisfies the linear quadratic system y = x + 3 and y = 5 x2?
‰ y = x + 3 y = 5 x2 ? Options: a) (2, 1)
b) (2, 1)
c) (1, 2)
d) (4, 1) Correct Answer: (2, 1) Question 30.Find the slope of a line perpendicular to the line whose equation is 2y + 6x = 24.
2y + 6x = 24 Options: a) 3
b) 6
c) 1/3
d) 1/6 Correct Answer: 1/3 Question 31.Find the midpoint of the segment connecting the points (a, b) and (5a, 7b).
(a, b) (5a, 7b) Options: a) (3a, 3b)
b) (2a, 3b)
c) (3a, 4b)
d) (2a, 4b) Correct Answer: (3a, 3b) Question 32.Which of the following is TRUE regarding the graphs of the equations of a linear quadratic system?
‰ ?
Options: a) the graphs may intersect in two locations. b) the graphs may intersect in one location. c) the graphs may not intersect. d) all three choices are true. Correct Answer: all three choices are true. Question 33.A lawn service company offers services within an 20 mile radius of their office. When the service area is represented graphically with the office located at (0,0), the equation that represents the service area is:
20 (0,0) : Options: a) x2 + y2 = 20
b) x2 + y2 = 40
c) x2 + y2 = 400
d) x2 + y2 = 4000 Correct Answer: x2 + y2 = 400 Question 34.Mathematically, what is a differential?
, ? Options: a) A gear box on the back end of your car. b) A word used a lot on a popular medical television series. ‾ c) A method of directly relating how changes in an independent variable affect changes in a dependent variable. , d) A method of directly relating how changes in a dependent variable affect changes in an independent variable. , Correct Answer: A method of directly relating how changes in an independent variable affect changes in a dependent variable. , Question 35.At what value of q is the concavity of w(q) = 2, if w(q) = q4 16?
w(q) = q4 16, w w(q) = 2 ? Options: a) At q = fourth root of 14. q = 14 b) At q = 0. q=0 c) Never w(q) is always concave down. , w(q) d) Never w(q) is always concave up. , w(q) Correct Answer: Never w(q) is always concave up. , w(q) Question 36.What is needed to fully determine an antidifferentiated function?
? Options: a) A lot of luck. b) A boundary condition. c) What its value is at (0, 0). (0,0) d) Its real world application. Correct Answer: A boundary condition. Question 37.Let ƒ:X → Y be an onetoone map. Then which of the following is not correct?
ƒ:X → Y ‰ :
Options: a) X may be a subset of Y X, Y b) Y may be a subset of X Y, X c) X should be equal to Y X, Y d) cardinality of X should be equal to cardinality of Y X Y Correct Answer: X should be equal to Y X, Y Question 38.ion of the partial differential equation yzp+zxq=xy is given by
yzp+zxq=xy Options: a) x2+y2=c1 and x2+z2=c2
b) x2y2=c1 and x2z2=c2
c) x2+y2=c1 and x2z2=c2
d) x2y2=c1 and x2+z2=c2 Correct Answer: x2y2=c1 and x2z2=c2 Question 39.The dimension for Torque are
Options: a) M2L2T2
b) ML2T2
c) ML2T1
d) M2L2T1
Question 40.Sound wave is a good example of
‾ Options: a) transverse waves b) longitudinal waves c) both transverse and longitudinal waves d) none of these Correct Answer: longitudinal waves Question 41.Which of the following are the characteristics of LASER beam a) Directionality b) Coherence c) Monochromaticity
a) b) c) Options: a) a & b only a & b b) a & c only a & c c) b & c only b & c d) a, b & c a, b & c Correct Answer: a, b & c a, b & c Question 42.A Qmeter uses the principle of
Q _____________
Options: a) variation of self inductance ‰ b) variation of mutual inductance ‰ c) series resonance d) None of these Correct Answer: series resonance Question 43.Two sources are said to be coherent if their emitted waves have
‰ : Options: a) same amplitude b) same wavelength c) constant phase difference d) All of these Correct Answer: All of these Question 44.There are eight images of a candle which is kept in between two plane mirrors. The angle of inclination of the plane mirror is
. . Options: a) 60°
b) 90°
c) 40°
d) 45° Correct Answer: 40° Question 45.Unit of Intensity of magnetic induction field is
: Options: a) N/Am
b) Tesla c) Wb/m2
d) All of these Correct Answer: All of these Question 46.105 Fermi is equal to
105 : Options: a) 1 meter 1 b) 100 micron 100 c) 1 angstrom unit 1 d) 1 mm 1 Correct Answer: 1 angstrom unit 1 Question 47.Which of the following is Unit of length?
‰ ?
Options: a) Lunar Month b) Kelvin ‰ c) candela d) Light year Correct Answer: Light year Question 48.Metals can ________ the light beams.
______________ Options: a) Reflect b) Refract c) Transmit d) Any Correct Answer: Reflect Question 49.Metals can transmit these ____.
____________ Options: a) Radio ways b) Visible light ‾ c) Microwaves d) xrays x Correct Answer: xrays x Question 50.Snell's law relates ____________.
____________ ‰‰ Options: a) Light relfection b) Light refraction c) Light transmission d) Light Absorption Correct Answer: Light refraction Question 51.Multiple reflections are called
: Options: a) reverberations b) refraction c) echo d) compressions Correct Answer: reverberations Question 52.Sum of protons and neutrons in an atom gives off
_________
Options: a) nucleon number ‰ b) mass number c) atomic number d) both nucleon number and mass number ‰ Correct Answer: both nucleon number and mass number ‰ Question 53.Hydrogen atom has an approximate diameter of
________ Options: a) 109m
b) 1010m
c) 910m
d) 1011m Correct Answer: 109m Question 54.Elements which have same number of protons but different number of neutrons are called as
, : Options: a) isotopes b) isomers c) allotropes d) allomers Correct Answer: isotopes Question 55.Proton number is denoted by symbol
: Options: a) A
b) Z
c) P
d) N Correct Answer: Z Question 56.An electron can never be found inside nucleus', this statement is according to
‰ ‰ ___________ Options: a) Heisenberg uncertainty principle b) Bernoulli's equation c) bohrs model d) both Heisenberg uncertainty principle and Bernoulli's equation Correct Answer: Heisenberg uncertainty principle Question 57.For an RLC circuit, R= 20 Ω, L= 0.6 H, the value of C (in mF) for Critically damped, overdamped, under damped condition respectively will be
RLC R= 20 Ω, L= 0.6 H. , C (mF ) Options: a) 6, >6, <6
b) 6, <6, >6
c) >6, 6, <6
Question 58.
Options: a) RL impedance function RL b) RL admittance function RL c) LC impedane function LC d) LC admittane function LC Correct Answer: RL impedance function RL Question 59.A 12 mA current source has an internal resistance, RS of 1.2 kΩ. The equivalent voltage source is
12 mA RS 1.2 kΩ Options: a) 1.44 V
b) 14.4 V
c) 7.2 V
d) 72 mV Correct Answer: 14.4 V Question 60.The equivalent inductance is between I and I' is
I I' ‰
Options: a) L1 + L2
c) L1 + L2 +2M
d) L1 + L2 2M Correct Answer: L1 + L2 +2M Question 61.The ratio of r.m.s value to average value is called
: Options: a) amplitude factor b) form factor c) crest factor d) peak factor Correct Answer: form factor Question 62.Given two coupled inductors L1 and L2, their mutual inductance M satisfies
‰ ‰ L1 L2 ‰ :
Options: a)
Correct Answer:
Question 63.When the relative permeability of a meterial is slightly less than 1, is called a
1 , , Options: a) diamagnetic material b) paramagnetic material c) ferromagnetic material d) None of these Correct Answer: diamagnetic material Question 64.Capacitance of a network can be increased by putting
Options: a) Capacitor in Series b) Capacitor in Parallel c) Capacitor Anywhere in the network d) Putting Resistor in Series Correct Answer: Capacitor in Parallel Question 65.In Thevenin's Model the Resistance Rth is defined as
(Thevenin's Model) Rth Options: a) Open circuit impedance between two points b) Close Circuit impedance between two points c) Impedance calculated by replacing voltage/ current source with their impedance / d) None of these Correct Answer: Impedance calculated by replacing voltage/ current source with their impedance / Question 66.The conductor used for High Quality surface to surface contacts is
Options: a) Silver b) Copper c) Aluminium d) Gold
Correct Answer: Gold Question 67.A circuit component that opposes the change in circuit voltage is
: Options: a) resistance b) capacitance c) inductance ‰ d) All of these Correct Answer: capacitance Question 68.In an RL series circuit, the power factor is
RL ‰ : Options: a) leading b) lagging c) zero d) unity Correct Answer: lagging Question 69.If the atomic number of germanium is 32, the number of electrons in the outer most shell will be
32 ‰ : Options: a) 2
b) 3
c) 4
d) 6 Correct Answer: 4 Question 70.The Ohm's law for magnetic circuit is
: Options: a) reluctance = flux/mmf
b) mmf=reluctance
c) mmf = flux/reluctance
d) mmf=flux x reluctance Correct Answer: mmf=reluctance Question 71.The major drawback of a primary cell is that
Options: a) chemical action is not reversible b) chemical action is reversible c) electrolyte used is very costly ‰ d) not portable Correct Answer: electrolyte used is very costly ‰ Question 72.The current in capacitive circuits _______ the voltage
‰ ,
Options: a) Lags b) Leads c) Inphase with d) None of these Correct Answer: Leads Question 73.The relative permiabilty μr is given by
μr Options: a) B / μo . H
b) B/H
c) H/B
d) None Correct Answer: B / μo . H Question 74.In a transformer, the ratio of primary to secondary is 9:4. If power input is P, what will be the ratio of power output to the power input
9:4 . ‰ (Power) P ‰ ‰ ? Options: a) 4:9
b) 9:4
c) 5:4
d) 1:1 Correct Answer: 1:1 Question 75.The ________ is defined as the time the output is active divided by the total period of the output signal.
________ Options: a) on time b) off time c) duty cycle d) active ratio Correct Answer: duty cycle Question 76.The operation of a JFET involves
JFET ‰ : Options: a) A flow of minority carriers b) A flow of majority carriers c) Recombination d) Negative Resistance ″ Correct Answer: A flow of majority carriers Question 77.A BJT is a ________controlled device and the JFET is a ________ controlled device
__________ JFET ___________
Options: a) voltage, voltage , b) voltage, current , c) current, voltage , d) current, current , Correct Answer: current, voltage , Question 78.An astable 555 timer has the following number of stable states
555 ‰ : Options: a) 0
b) 1
c) 2
d) 3 Correct Answer: 0 Question 79.The impurity commonly used for realizing the base region of a silicon NPN transistor is
NPN : Options: a) Silicon b) Antimony c) Germanium d) Boron Correct Answer: Boron Question 80.When a transistor is fully switched ON, it is said to be
: ON , Options: a) shorted b) saturated c) open d) cutoff Correct Answer: saturated Question 81.The positive swing of the output signal in a transistor circuit starts clipping first when Qpoint of the circuit moves
‰ ‰ QPoint Options: a) to the centre of the load line b) twothird way up the load line c) towards the saturation point d) towards the cutoff point Correct Answer: towards the cutoff point Question 82.The common mode ratio of an ideal diffamp is
diffamp
Options: a) zero b) infinity c) less than unity d) greater than unity Correct Answer: infinity Question 83.The leakage current of a PN diode is cuased by
PN Options: a) heat energy b) chemical energy c) barrier potential (barrier potential) d) majority carriers Correct Answer: heat energy Question 84.Which of the following is Primary memory
‰ ? Options: a) Hard disk b) Pen Drive c) On Board Memory d) None of these Correct Answer: On Board Memory Question 85.Common Emitter Amplifier is also known as
Options: a) Current Amplifier b) Voltage Amplifier c) Power Amplifier ‰ d) Frequency Modulator Correct Answer: Voltage Amplifier Question 86.Which of the following Biasing is mostly used for BJT
‰ BJT Options: a) Fixed Biasing b) Voltage Divider c) Collector to Base Biasing ‰ d) Fixed Biasing with Emitter Resistance Correct Answer: Voltage Divider Question 87.In a classB amplifier the output current flows for ______
‰ .
Options: a) 90°
b) 180°
c) More than 180° and less than 270° 180° 270° d) 360° Correct Answer: 180° Question 88.In a multistage amplifier, the intermediate stages are always in
, _________ Options: a) CB configuration CB ‰ b) CE configuration CE ‰ c) CC configuration CC ‰ d) may have any configuration ‰ Correct Answer: CE configuration CE ‰ Question 89.At resonance, the impedance of a parallel tuned circuit formed by capacitor C (lossless) and inductor L (with series resistance R) approximately equals
, C () ‰ L ( R ) _________ Options: a) L/CR
b) LC/R
c) LR/C
d) 1/LCR Correct Answer: L/CR Question 90.The class B pushpull circuit can deliver 100 W ac output power. What should be the minimum power rating of each transistor?
B 100 w ? Options: a) 20 W
b) 40 W
c) 10 W
d) 80 W Correct Answer: 20 W Question 91.A relay is
: Options: a) A mechanical switch ‰ b) An electronic switch ‰ ‰ c) An electromechanical switch ‰ d) none of these Correct Answer: An electromechanical switch ‰ Question 92.The dc resistance of a crystal diode is ________ its ac resistance
, ____________ Options: a) the same as b) more than c) less than d) none of these Correct Answer: less than
Question 93.In the logic circuit of fig. the redundant gate is
?
Options: a) 1
d) 4 Correct Answer: 2 Question 94.Three Boolean opertors are
: Options: a) NOT, OR,AND
b) NOT, NAND, OR
c) NOR, OR, NOT
d) NOR, NAND, NOT Correct Answer: NOT, OR,AND Question 95.The full adder can be made out of
Options: a) Two Halfadders b) Two Halfadders and a NOT gate NOT c) Two Halfadders and an AND gate AND d) Two Halfadders and an OR gate OR Correct Answer: Two Halfadders and an OR gate OR Question 96.Sampleandhold circuits in analogto digital converters (ADCs) are designed to:
(ADCs) : Options: a) sample and hold the output of the binary counter during the conversion process b) stabilize the comparator's threshold voltage during the conversion process ‰ c) stabilize the input analog signal during the conversion process ‰ d) sample and hold the D/A converter staircase waveform during the conversion process / Correct Answer: stabilize the input analog signal during the conversion process ‰ Question 97.One application of a digital multiplexer is to facilitate:
_________ Options: a) Serialtoparallel conversion b) Data generation c) Parity checking d) Data selector ‰
Correct Answer: Data selector ‰ Question 98.The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?
A = 1100 B = 1001 ? Options: a) A > B = 1, A < B = 0, A < B = 1
b) A > B = 0, A < B = 1, A = B = 0
c) A > B = 1, A < B = 0, A = B = 0
d) A > B = 0, A < B = 1, A = B = 1 Correct Answer: A > B = 1, A < B = 0, A = B = 0 Question 99.LCDs have response time of the order of
LCDs Options: a) is few ns ns b) tens of ns ns c) a few milliseconds d) hundred of milliseconds Correct Answer: hundred of milliseconds Question 100.Popular application of flipflop are
‰‰ ‰ : Options: a) counters b) shift registers c) transfer register d) all of these Correct Answer: all of these Question 101.The process of deliberately adding impurity to a semiconductor material is called
? Options: a) impurification ‰‰ b) pollution c) deionisation d) doping Correct Answer: doping Question 102.Which of the following is a unit of memory
‰ ? Options: a) RAM
b) KB
c) Bit
d) Byte Correct Answer: RAM Question 103.Binary numbers can be converted into Hexadecimal numbers by grouping bits into group of ____ starting from _________and represented each group as Hexadecimal number
, .
Options: a) Three bits, Right Most bit , b) Three bits, Left Most bit , c) Four bits, Right Most bit , d) Sixteen bits, Left Most bit , Correct Answer: Four bits, Right Most bit , Question 104.A 'n' bit flash type ADC requires maximum of ______ to complete conversion
'n' ‰ . Options: a) "n" Clock pulses "n" b) "2n+1" Clock pulses "2n+1" c) one clock pulse d) "2n1" Clock pulses "2n1" Correct Answer: one clock pulse Question 105.Race around condition occur in JK Flip Flop is due to
.. ‰‰‰ ‰ Options: a) The clock time period is less than propagation delay b) The clock time period is greater than propagation delay c) Due to triggering d) None Correct Answer: The clock time period is greater than propagation delay Question 106.Divide by 78 counter can be realized using
78 . Options: a) 6 number of mod13 counters 13 6 b) 13 number of mod6 counters 6 13 c) 13 number of mod13 counters 13 13 d) one mod13 counter followed by one mod6 counter 13 6 Correct Answer: one mod13 counter followed by one mod6 counter 13 6 Question 107.The circuit used for parallel to serial conversion of data is known as
Options: a) decoder b) demultiplexer c) multivibrator d) multiplexer Correct Answer: multiplexer Question 108.MOS logic gates have no current hogging problem because the gate terminal has
MOS _____________
Options: a) low input impedance b) zero impedance c) compensating effect d) high impedance Correct Answer: compensating effect Question 109.A flipflop can store
‰‰ ‰ __________ Options: a) 1 bit of data 1 b) 2 bits of data 2 c) 3 bits of data 3 d) 4 bits of data 4 Correct Answer: 4 bits of data 4 Question 110.Which one of the logic families has maximum fanout capacity?
‰ ? Options: a) RTL
b) ECL
c) MOS
d) CMOS Correct Answer: CMOS Question 111.The speed of a motor generator set consisting of 6pole induction motor and a 4pole dc generator fed from a 3 phase 50 Hz supply is _____________ rpm.
6 4 3 – 50 Hz ________ rpm Options: a) 1000
b) 600
c) 1500
d) 3000 Correct Answer: 600 Question 112.A rotary converter generally
Options: a) Combines the function of an induction motor and a dc generator b) Has a set of slip rings at both ends c) Has one armature and 2 fields d) Is a synchronous motor and a dc generator combined Correct Answer: Is a synchronous motor and a dc generator combined Question 113.In a 3phase, 3wire unbalanced load, power cannot be measured by two wattmeters
3 , 3 , ‰ Options: a) TRUE b) FALSE c) Cannot be said d) None of these
Correct Answer: FALSE Question 114.The insulation resistance test is performed with
_____________ Options: a) Ohmmeter b) Megger c) Earth Tester d) Wheaston Bridge Correct Answer: Megger Question 115.In case of Circuit Breakers if the length of arc increases, its resistance is
, : Options: a) decreases b) increases c) remain same d) some times increases or decreases Correct Answer: increases Question 116.One ton of refrigeration (1 TR) means that the heat removing capacity is
(1TR) _______ Options: a) 21kJ/min
b) 210kJ/min
c) 420kJ/min
d) 210kJ/sec Correct Answer: 210kJ/min Question 117.Load saturation characteristics of a DC generator gives relation between
DC ‰ Options: a) V and Ia V Ia b) E and Ia E Ia c) Eo and If Eo If d) V and If V If Correct Answer: V and If V If Question 118.Charger used to charge the Batteries of Car are
Options: a) Fast Chargers b) Trickle Chargers c) Pulse chargers d) Inductive chargers ‰‰ Correct Answer: Pulse chargers Question 119.In a 3 Φ phase balance star connected load, if one of the supply phases gets broken, the phase current & line current will become______________ & ____________times to the preveious value respectively
3 Φ ________ _________ :
Options: a) 1,1/√3
c) 2/√3, 2/√33
d) √3/2, √33/2 Correct Answer: √3/2, √33/2 Question 120.In a d.c. generator the generated e.m.f. is directly proportional to the ______________
‾ _______________ Options: a) field current b) number of armature parallel paths c) number of dummy coils d) pole flux ‰ Correct Answer: pole flux ‰ Question 121.In a d.c. motor which of the following can sustain the maximum temperature rise ?
‰ ‰ ? Options: a) armature winding b) field winding c) commutator d) slip ring Correct Answer: field winding Question 122.The brushes in d.c. machines are made of carbon
Options: a) to reduce the size of brushes b) to reduce the wear and tear of commutator c) to increase the efficiency of the commutator d) None of these Correct Answer: to reduce the wear and tear of commutator Question 123.Transmission lines are generally operated at
: Options: a) 132 KV to 220 KV 132 220 b) 30 KV to 66 KV 30 66 c) upto 11 KV only 11 d) 0.415 KV to 11 KV 0.415 11 Correct Answer: 30 KV to 66 KV 30 66 Question 124.When Microwave signals follow the curvature of the earth, this is known as
,
Options: a) the Faraday effect b) ducting c) tropospheric scatter ‰ d) ionospheric reflection ‰ Correct Answer: ducting Question 125.In an FM system, if modulating voltage is constant and modulation frequency is lowered
FM ‰ Options: a) Relative amplitude of distant sidebands increases b) Relative amplitude of distant sidebands decreases c) frequency deviation increases d) frequency deviation decreases Correct Answer: Relative amplitude of distant sidebands increases Question 126.In a circular waveguide the dominant mode is
Options: a) TE01
b) TE11
c) TE20
d) TE21 Correct Answer: TE11 Question 127.The modulation index of an FM signal, having a carrier swing of 100 KHZ with modulation signal frequency is 8 KHZ is
FM , 8 KHz ‰ 100 KHz , : Options: a) 6.25
b) 12.5
c) 16.8
d) 2.85 Correct Answer: 12.5 Question 128.Data rate supported by Standard Ethernet is
__________ Options: a) 10 Mbps
b) 100 Mbps
c) 1000 Mbps
d) 10 Gbps Correct Answer: 10 Mbps Question 129.The number of channels available in MF band (300 kHz 3 MHz) for AM modulating signal of 20 kHz is
20 kHz AM MF (300 kHz 3 MHz) Options: a) 135
b) 67
c) 150
d) 15 Correct Answer: 67
Question 130.In PCM, if the number of quantization levels is increased from 4 to 64, then the bandwidth requirement will approximately be increased __________ times
PCM , 4 64 , _________ Options: a) 8
b) 16
c) 32
d) 3 Correct Answer: 3 Question 131.The intermediate frequency of a superhet receiver in 450 KHz. If it is tuned to 1200 KHz, the image frequency will be
450 KHz 1200 KHz ___________ Options: a) 750 KHz
b) 900 KHz
c) 1650 KHz
d) 2100 KHz Correct Answer: 2100 KHz Question 132.The thermal noise is due to random ______________
_______________ Options: a) motion of atoms and molecules b) vibration of atoms about their mean position inside the conducting medium c) motion of free electrons ‰ d) none of these Correct Answer: motion of free electrons ‰ Question 133.The height of the transmitting antenna is 225 m above ground level, its radio horizon will be ______________
225 _____________ Options: a) 120 Km
b) 76 Km
c) 60 Km
d) 225 Km Correct Answer: 60 Km Question 134.In radio receivers tube EM 84 is used as _______________
EM 84 _____________ Options: a) magic eye b) full wave rectifier c) audio amplifier d) none of these Correct Answer: magic eye Question 135.A transmission line has a VSWR of 2, the reflection coefficient is __________
VSWR 2 ______________ Options: a) 0
b) 0.25
c) 0.333333333333333
d) 0.5
Correct Answer: 0.333333333333333 Question 136.Sound loudness is represented by
: Options: a) Frequency of sound signal b) Magnitude of sound signal c) both frequency and magnitude of sound signal d) Phase difference of the signal Correct Answer: both frequency and magnitude of sound signal Question 137.Which of the following is incorrect?
? Options: a) SWR is a measure of mismatch between the load and the line SWR b) When a complex load is connected to a transmission line, standing waves result even if magnitude of load impedance is equal to characteristic impedance of line. ‾ c) A short circuited line less than λ/4 long behaves as a pure inductance λ/4 d) None of these Correct Answer: None of these Question 138.The voltage wave in a lossless transmission line has the maximum magnitude of 6 volt and minimum magnitude of 2.4 volt. The reflection coefficient of the transmission line is
6 2.4 Options: a) 0.43
b) 2.33
c) 1.4
d) 0.71 Correct Answer: 0.43 Question 139.A transmission line is distortionless if
Options: a) RL = 1/GC
b) RL = GC
c) LG = RC
d) RG = LC Correct Answer: LG = RC Question 140.A transmission line has the characteristic impedance Z0 and the voltage standing wave ratio is S . The line impedance on the transmission line at voltage maximum and minimum are respectively
Z0 VSWR S Options: a) Z0S, Z0/S
b) Z0/S, Z0S
c) Z0S, Z0S
d) Z0/S, Z0/S Correct Answer: Z0S, Z0S Question 141.If a transmission line of length less than λ / 4 is short circuited, it behaves as
λ / 4 :
Options: a) Pure capacitive reactance b) Pure inductive reactance. ‰‰ c) Parallel resonant circuit d) Series resonant circuit. Correct Answer: Pure inductive reactance. ‰‰ Question 142.A two port network is symmetrical if
Options: a) A'=B'
b) B'=C'
c) A'C'=B'D'
d) A'=D' Correct Answer: A'=D' Question 143.A transducer converts
Options: a) mechanical energy into electrical energy b) mechanichal displacement into electrical signal c) one form of energy into another form of energy d) electrical energy into mechanical form Correct Answer: one form of energy into another form of energy Question 144.For higher Voltage three phase transmission
Options: a) Thick Neutral Wire is used b) Thin Neutral Wire is used c) No Neutral wire is used d) None of these Correct Answer: No Neutral wire is used Question 145.The Length of IP Address in IPV6 is
IPV6 IP Options: a) 128 Bits 128 b) 256 Biits 256 c) 64 Bits 64 d) 32 Bits 32 Correct Answer: 128 Bits 128 Question 146.High pass T Filter has
T
Options: a) Low input impedance at low frequencies b) High input impedance at high frequencies c) High output impedance at low frequencies d) Low input impedance at high frequencies Correct Answer: Low input impedance at high frequencies Question 147.Which of the following expression shows correct function for 'Y' parameter in a two port network?
Y ? Options: a) (V1,V2)=f(I1, I2)
b) I1, I2)=f(V1,V2)
c) (V1,I1)=f(V2 I2)
d) (V1,I2)=f(I1, V2) Correct Answer: I1, I2)=f(V1,V2) Question 148.For a two port reciprocal network , the three transmission parameters are given by, A=3/5, B=7/5, C=4/5, what is the value of D?
, , A=3/5, B=7/5, C=4/5 , D ______________ Options: a) 1
b) 3/5
c) 53/15
d) 1/2 Correct Answer: 53/15 Question 149.Effective impedance in parallel resonance is given by
: Options: a) R
b) L/RC
c) C/LR
d) LC/R Correct Answer: L/RC Question 150.Kelvin's double bridge is used to measure low resistances because
‰ ( ) Options: a) it has high sensitivity ′ b) there is no thermoelectric emf ‰‰‰ c) resistance variation due to temperature d) effect of contact and lead resistances is eliminated Correct Answer: effect of contact and lead resistances is eliminated Question 151.A substance that changes its MB_Electrical resistance when light falls on it, is known as
: Options: a) Photo Voltaic substance b) Photo conductive substance ‰‰ c) Both d) None of these Correct Answer: Photo conductive substance ‰‰
Question 152.Which of the following is true?
‰ ? Options: a) Accuracy can be achieved without precision , , b) Precision can be without accuracy , c) Both Accuracy can be achieved without precision & Precision can be without accuracy , , , d) None of these Correct Answer: Precision can be without accuracy , Question 153.A set of readings has a wide range and therefore it has ______
______________ Options: a) high precision b) high accuracy c) low accuracy d) low precision Correct Answer: low precision Question 154.A volt meter has a resistance of 2000Ω, When it is connected across a d.c. circuit its power consumption is 2 MW. Suppose this voltmeter is replaced by a voltmeter of 4000Ω resistance, the power consumption will be
2000Ω ‰ 2mw 4000Ω ‰ ______ Options: a) 4 mw 4 b) 1mw 1 c) 2 mw 2 d) none of these Correct Answer: 1mw 1 Question 155.Which one of the following is an active transdeucer?
‰ ______________ ? Options: a) Strain guage b) Selsyn c) Photovotaic cell d) Photo emissive cell ‰ Correct Answer: Photovotaic cell Question 156.Pirani gauge is useful for measurement of pressure between __________
____________ Options: a) 101 to 103 mm of Hg
b) 101 to 106 mm of Hg
c) 101 to 109 mm of Hg
d) 101 to 1012 mm of Hg Correct Answer: 101 to 103 mm of Hg Question 157.When an amplifier is overdriven and clips the input signal, the type of distortion occurs is _______________
‰ _______________
Options: a) frequency distrotion b) amplitude distrotion c) phase distortion d) crossover distrotion Correct Answer: amplitude distrotion Question 158.A voltage using a 20 micro Amp meter movement has a sensitivity of
20 Options: a) 20 micro ohm/volt 200 / b) 1000 ohm/volt 1000 / c) 20,000 ohm/volt 20000 / d) 50,000 ohm/volt 50000 / Correct Answer: 20,000 ohm/volt 20000 / Question 159.Lissajons pattern can be used for determining
___________ Options: a) Voltage amplitude b) Amplitude distortion c) Frequency distortion d) Phase shift Correct Answer: Frequency distortion Question 160.The connecting probe in CRO causes
: Options: a) loading b) distortion in the wave c) loading and distortion in the wave both d) None of these Correct Answer: distortion in the wave Question 161.Energy meter is a
___________ Options: a) recording instrument b) integrating instrument c) indicating instrument d) none of these Correct Answer: integrating instrument Question 162.The pressure coil of an energy meter has
_____________
Options: a) few turns of thin wire b) few turns of thick wire c) many turns of thin wire d) many turns of thick wire Correct Answer: many turns of thin wire Question 163. The root locus plot for a system is given below. The open loop transfer function G(s)H(s) corresponding to this plot is given by
G(s)H(s)
Options: a)
Correct Answer:
Question 164.A system with gain margin close to unity or a phase margin close to zero is
_______________ Options: a) highly stable. b) oscillatory. c) relatively stable. ‰‰ d) unstable. Correct Answer: relatively stable. ‰‰ Question 165.
Options: a) Type 0, Order 1 0, 1 b) Type 0, Order 2 0, 2 c) Type 1, Order 1 1, 1 d) Type 1, Order 0 1, 0
Correct Answer: Type 0, Order 2 0, 2 Question 166.The frequency at which the magnitude of the open loop transfer function is unity
‰‰ : Options: a) gain cross over frequency b) phase cross over frequency c) corner frequency d) phase frequency Correct Answer: gain cross over frequency Question 167.In an open loop control system
Options: a) control action is independent of the output ‰‰ b) control action depends on human judgement ‰‰ c) internal system changes are automatically taken care of d) both control action is independent of the output and control action depends on human judgement ‰‰ ‰‰ Correct Answer: both control action is independent of the output and control action depends on human judgement ‰‰ ‰‰ Question 168.In a closed loop control system
′ Options: a) control action depends on the output and also on the input command ‰‰ b) output signal is feedback to be compared with the reference signal c) the accuracy is better than in open loop system d) All of these Correct Answer: All of these Question 169.The unity circle of Nyquist plot corresponds to the 0db line for the Bode plot for ___________
______________ Options: a) high frequencies b) low frequencies c) medium frequencies d) all frequencies Correct Answer: all frequencies Question 170.The medium in pneumatic system is ____________
______________ Options: a) liquied b) helium c) oil d) air Correct Answer: liquied
Question 171.The node in the signal flow graph performs
: Options: a) Addition of signals from all incoming branches only b) Transmitting sum of all incoming signals to outgoing branches c) All of these d) None of these Correct Answer: None of these Question 172.The transfer function of a system is used to calculate ___
‰‰ _____________ Options: a) Type of the system b) The output for a given input c) Time constant ‰ d) None of these Correct Answer: The output for a given input Question 173.Nyquist stability test is a graphical method and its advantages are
Options: a) Applicable to experimental results or frequency response of open loop system b) Closed loop stability can be predicted from open loop results ′ ‰ c) It indicates how to stabilize an unstable system d) All of these Correct Answer: Applicable to experimental results or frequency response of open loop system Question 174.A servo system is absolutely unstable if
: Options: a) There are no stable compon