transformers & ac motors [15ee41t ] · 2018. 12. 30. · transformers & ac motors [15ee41t ]...

TRANSFORMERS & AC MOTORS [15EE41T ]

Question Bank – Unit Wise

Department of Electrical & Electronics Engineering, Jain Polytechnic Belagavi

Unit – 1: SINGLE PHASE TRANSFORMERS

1 Explain the working principle of transformer with neat sketch. 5 April/May-17 Nov/Dec-17

2 Explain with neat sketch the construction of core type

transformer.

5 April/May-17 Nov/Dec-17

3 Explain the operation of transformer with load with the help of

vector diagram.

6 April/May-17 April/May-18 Nov/Dec-17 Nov/Dec-18

4 Draw the equivalent circuit of transformer. 5 April/May-17 Nov/Dec-17

5 What are the various losses in transformers? 5 April/May-17 Nov/Dec-17 Nov/Dec-18

6 Derive the equation for emf induced in transformer. 5 April/May-17 April/May-18 Nov/Dec-17 Nov/Dec-18

7 Explain S.C. and O.C. tests conducted on the transformer.


8 Derive the condition for maximum efficiency of transformer.


9 Explain the necessity & conditions for parallel operation of the

transformer.

5 April/May-17 Nov/Dec-17 Nov/Dec-18

10 Classify the transformers based on construction and application. 5 April/May-18 Nov/Dec-17

11 Define with suitable equations (i) voltage regulation (ii)

Efficiency


12 Explain with neat sketch the construction of shell type

transformer.

5 Nov/Dec-18

13 Compare auto transformer with two winding transformer. 5 Nov/Dec-18

14 An ideal 25 KVA transformer has 500 turns on the primary

winding and 40 turns on secondary winding. The primary is

connected to 3000V 50Hz supply. Calculate (i) primary and

secondary currents on full load (ii) secondary emf (iii) The

maximum core flux.

5 Nov/Dec-18

15 Explain magnetic leakage in a transformer. 4 Nov/Dec-18

16 A 40KVA distribution transformer has iron loss of 500 watts and

full load copper loss of 500 watts. The transformer is supplying a

lighting load (unity power factor). The load cycle is as under full

load for 4hours; half full load for 8 hours; and no load for 12

hours. Calculate the all day efficiency of the transformer.

5 Nov/Dec-18

Unit 2 : THREE PHASE TRANSFORMERS

1 Explain the construction of three phase transformer. 5 April/May-17 Nov/Dec-17

2 Explain star-star connection of transformer. 5 April/May-17 Nov/Dec-17




3 Draw the 4 different ways of connecting primary and secondary

windings of three phase transformers and write the relation

between line and phase voltages and currents.

6 April/May-17 Nov/Dec-17 April/May-18

4 Explain Necessity of cooling of transformer and types.


5 Explain air blast cooling and oil natural cooling. 5 April/May-18 Nov/Dec-17

6 List the various types of cooling of transformer. 5 Nov/Dec-18

7 Explain the arrangement of the connection for three single phase

transformers for delta-delta.

5 Nov/Dec-18

Unit – 3: THREE PHASE INDUCTION MOTORS

1 Explain the construction and working of three phase induction

motor with diagram.


2 Explain the construction of three phase squirrel cage induction

motor with diagram.


3 Explain the construction of three phase slip ring induction motor

with diagram.


4 Explain and derive equation for starting torque produced in three

phase induction motor.


Nov/Dec-18

5 Explain how the rotating magnetic field is produced in three

phase induction motor.


6 Draw and explain slip torque curves of induction motor. 5 April/May-18 Nov/Dec-17 Nov/Dec-18

7 Write the relation between rotor power input, rotor mechanical

power developed and slip of induction motor.


8 State the condition for maximum torque in induction motor.


9 Explain with neat sketch construction of squirrel cage rotor. 5 Nov/Dec-18

10 Define the term slip. Write the equations for slip and frequency

of rotor current.

5 Nov/Dec-18

11 The power input to the rotor of a 400V 50Hz 6 pole 3phase

induction motor is 20KW. The slip is 3%. Calculate (i) The

frequency of rotor currents (ii) rotor speed (iii) rotor copper

losses.

5 Nov/Dec-18




Unit 4 : STARTING AND SPEED CONTROL OF INDUCTION MOTORS

1 Explain the necessity of starter in Induction motor. 5 April/May-17 Nov/Dec-17 Nov/Dec-18

2 Explain the effect of change in supply voltage on starting torque

and speed of an induction motor.


3 Explain with neat sketch the construction and working of DOL

starter.


4 Explain with neat sketch the construction and working of star

delta starter.


5 Explain speed control of 3-phase induction motor by variable

frequency method.


6 Explain speed control of 3-phase induction motor by change of

poles.


7 Explain different methods of speed control of induction motors.


8 Explain the rotor rheostat speed control of slip ring induction

motor.

5 Nov/Dec-18

9 Explain with neat sketch the working of auto transformer starter. 5 Nov/Dec-18

Unit – 5: SYNCHRONOUS MOTORS

1 Explain the construction and working of synchronous motor.


2 Explain comparison between synchronous motor with induction

motor.


3 Explain hunting in synchronous motor and how it can be

prevented.


Nov/Dec-18

4 Explain the effect of change in excitation at constant load in

synchronous motors.


5 Explain why synchronous motor is not self starting. 5 April/May-18 Nov/Dec-17

6 Explain V curves with sketch.


7 Explain the principle of operation of synchronous motor. 5 Nov/Dec-18

8 List the applications of synchronous motor. 3 Nov/Dec-18

Unit – 6: SINGLE PHASE INDUCTION MOTORS

1 Explain the construction, principle of operation, characteristics

of Single phase Capacitors start and run induction motor.






of Single phase capacitors start capacitor run induction motor.



of Single phase resistance split induction motor.


4 Explain Magnetic Levitation 5 April/May-18 Nov/Dec-17 Nov/Dec-18

5 Explain Induction Generators. 5 April/May-18 Nov/Dec-17

6 Explain the principle of working & characteristics of linear

induction motor.


7 Explain the construction and working of shaded pole

induction motors.

5

April/May-18 Nov/Dec-17 Nov/Dec-18

Electrical Measurements and Measuring Instruments (15EE42T)

Question Bank- Unit wise

Department of Electrical and Electronics Engineering , Jain Polytechnic Belagavi

Question Bank

Sl.No Question Mark Year

UNIT-1 1 Define error? Mention the types of errors. 5 (Nov/dec-17)(Apr/May 17)

(Apr/may-18)

2 Define a).precision b).accuracy c).sensitivity d).resolution e).tolerance

5 Nov/dec-17

3 Explain i) Deflecting system ii) controlling system iii) Damping system

7 Nov/dec-17

4 Explain classification of Electrical Measurements and give example for each

5 (Apr/May 17)

5 Explain the necessity of torque in instruments. List the types of torque.

5 Apr/may-18)

6 Explain different types of effects used to produce

deflecting torque in analog instrument

5 (Nov/Dec18)

7 Explain spring control method of producing control

torque in an analog instrument

5 Nov/Dec18)

UNIT-2 1 List merits and demerits of MC Instruments 5 (Apr/May 17), Nov/Dec18) 2 List merits and demerits of MI Instruments 5 Apr/May 17) , (Apr/may-18

3 Explain the use of shunts for range extension of dc ammeter

5 (Nov/dec-17)(Apr/May 17)

4 Explain the calibration of voltmeter using potentiometer with a neat circuit arrangement

5 (Apr/May 17)

5 Design a shunt to extend the range of DC ammeter

from 1000 mA to 6 amps .The internal resistance of

meter is 15 ohms

5 (Apr/May 17)

6 Explain the construction and operation of PMMC type moving coil Instruments with neat

sketch

10 (Apr/May 17), (Nov/dec-17)

7 List applications of Moving coil instruments 3 Apr/May 17)

8 List the types of errors in moving iron instruments 3 (Nov/dec-17) 9 Moving coil meter takes 25mA to produce a full

scale deflection and resistance of meter is 10 ohm

.Design a suitable scheme so as to use instrument as

an i) Ammeter reading o-20 A and as

ii) Voltmeter reading 0-20 volts

4 (Nov/dec-17)

10 Describe the calibration a moving coil voltmeter with a neat circuit diagram

5 (Nov/dec-17)

11 Compare moving coil instruments and moving iron instruments

5 (Nov/dec-17)

12 Explain the construction and operation of repulsion

type moving iron instrument with

with a neat diagram.

8 (Apr/may-18, Nov/Dec18)

13 List the types of range extension used for DC meters 2 (Apr/may-18 14 Draw the circuit of range extension of DC ammeter,

DC voltmeter AC ammeter and AC Voltmeter

8 (Apr/may-18)




15 Find the value of multiplier required of internal

resistance of voltmeter is 20 ohm, full scale

deflection with a voltage of 20 mili volt and voltage

to be measured is 5 volt

2 (Apr/may-18)

16 Derive the expression of shunt resistance in

extending the range of DC ammeter

5 (Apr/may-18)

17 Explain the calibration of ammeter using dc

potentiometer with a neat circuit arrangement

5 Nov/Dec18)

18 Explain range extension of DC voltmeter using

multiplier with circuit diagram

5 Nov/Dec18)

19 Explain the term burden as referred to instrument

transformer

5 Nov/Dec18)

20 A moving coil meter having a resistance of 20 ohm

given full scale deflection when a current of 10 mA

is passed through it.Design this instrument to used

for measurement of

i) Current upto 1 A ii) Voltage upto 5 v

6 Nov/Dec18)

UNIT-3 1 Explain the construction and operation of a

dynamometer type wattmeter a with neat

diagram

6 (Apr/May 17), (Apr/may-

18)

2 Explain the construction and operation of single phase induction type energy meter

with a neat diagram

7 (Nov/dec-17), (Apr/May 17), (Apr/may-18)

3 List and explain errors in wattmeters. 7 (Apr/May 17), Nov/Dec18)

4 Explain with circuit diagram two wattmeter method of three phase power measurement in star connected

load

4 (Apr/May 17), Nov/Dec18)

5 A 3 phase 500v motor load has a power factor of 0.4

.two wattmeter connected to measure the input they

show the input to be 30kw ,find the reading of each

wattmeter w1 and w2

5 (Nov/dec-17

6 A balanced three phase star connected load draws

power from 430 v suly. The two wattmeter connected

indicates w1=6KW and W2 =2.4 KW .calculate

power and power factor of the circuit

5 (Apr/May 17)

7 The reading of the two wattmeter connected across

the load are 400 W and 1KW ,determine power and

power factor of the load

5 Apr/may-18)

8 Explain the errors and adjustments which are made in

a single phase induction type energy meter

10 Nov/Dec18)

UNIT-4 1 Explain the measurement of unknown inductance

using maxwell’s bridge

5 (Nov/dec-17), Nov/Dec18)

2 Explain the measurement of unknown resistance using Wheat stone’s bridge

5 (Apr/May 17), Apr/may-18)




3 Draw the circuit of maxwells bridge and Kelvin double bridge and label the parameter

5 Apr/may-18)

4 If the three arms of the wheat stone’s bridge are

having resistances of 5KΩ,10KΩ,15 KΩ

respectively, find the value of resistance required to

balance the bridge.

3 (Nov/dec-17),

5 The Schering bridge employs a standard air capacitor

C2 of 100pF a non reactive resistance R1 of 300Ω in

parallel with variable capacitor C4 and variable

resistanceR3.Balance is obtained with C4=0.4μF and

R3=250Ω calculate the capacitance Cx and resistance

Rx.

5 (Apr/May 17), Nov/Dec18)

UNIT-5 1 Compare analog and digital meters 5 (Apr/May 17), Apr/may-

18), Nov/Dec18)

2 List merits and demerits of digital tachometer 5 (Apr/May 17), 3 List applications of LCR meter 3 Nov/dec-17) (Apr/May 17),

Nov/Dec18)

4 Explain operation of digital tong tester with neat

block diagram.

7 (Apr/May 17), (Nov/dec-

17), Nov/Dec18)

5 Explain the operation of digital P.f. meter with neat block diagram.

7 (Apr/May 17), Apr/may-18)

6 List merits and de-merits of digital synchroscope. 3 (Apr/May 17) 7 Explain the operation of digital frequency meter with

neat block diagram.

10 Nov/dec-17), Apr/may-18),

Nov/Dec18)

8 List merits and de-merits of digital non contact type

tachometer

3 Nov/dec-17)

9 Explain the operation of digital synchroscope with

neat block diagram..

5 Apr/may-18), Nov/Dec18)

10 List any two applications of digital meter 2 Apr/may-18)

11 Explain operation of digital trivector meter with neat

block diagram

8 Apr/may-18)

12 List any two applications of digital trivector meter 2 Apr/may-18)

13 Explain the construction and operation of digital multimeter with block diagram

10 Nov/Dec18)

UNIT-6 1 List applications of Bolometer 5 (Apr/May 17)

2 Mention the Parameter on which transducer can be selected

5 Apr/May 17), Nov/Dec18)

3 Explain the operation of thermocouple with a neat diagram

7 Nov/dec-17), Apr/May 17

4 List applications of thermocouple 3 Apr/May 17)

5 Explain the operation of LVDT with a neat circuit diagram

7 Nov/dec-17), Apr/May 17

6 List applications of Peizo-electric transducer 3 ), Apr/May 17, Nov/Dec18) 7 List types of transducer 5 Nov/dec-17), Apr/may-18)

8 List applications of LVDT 4 Nov/Dec18)




9 Explain the working of disappearing type optical

pyrometer with circuit diagram

6 Nov/Dec18)

8 Explain the operation of Bolometer used for RF

power measurement with a neat

block diagram

6 Nov/dec-17), Nov/Dec18)

9 List advantages and disadvantages of Peizo-electric transducer

4 Nov/dec-17),

10 Explain D.C.signal conditioning system with a neat block diagram.

5 Nov/dec-17),

11 Explain A.C.signal conditioning system with a neat block diagram.

5 Apr/may-18), Nov/Dec18)

12 Explain operation of optical pyrometer with a neat diagram.

8 Apr/may-18)

13 Explain operation of Peizo-electric transducer with a

neat diagram.

8 Apr/may-18)

14 Write the full form of LVDT and RVDT 2 Apr/may-18)

15 Explain the operation of opto-sensor with block diagram

4 Nov/Dec18)

COMMUNICATION AND COMPUTER NETWORKS (15EE43T)


Department of Electrical and Electronics Engineering, Jain Polytechnic Belagavi - 14

Question Bank

Sl.No Questions Marks Year

UNIT-1 : RADIO COMMUNICATION 1 Define the term 1.Simplex 2.Duplex communication 5 April/May-17

Nov/Dec-17

2 Explain the function of super heterodyne receiver with block diagram

5 April/May-17

Nov/Dec-17, April/May-18

3 State the need for modulation in communication 5 April/May-17 Nov/Dec-17, April/May-18

4 Draw the block diagram of AM transmitter & explain the operation

5 April/May-17

Nov/Dec-17, Nov/Dec-18

5 Explain the concept of amplitude modulation 5 April/May-17 Nov/Dec-17

6 Explain with a neat sketch 1. Ground wave 2. Sky

wave 3. Space wave

5 April/May-17


7 Explain the basic concept of TDM 5 April/May-17

Nov/Dec-17

8 What is frequency division multiplexing 5 April/May-17

Nov/Dec-17

9 Define modulation. List different types of modulation 5 April/May-18

10 Explain ground wave propagation with sketch 5 April/May-18 11 Define channel capacity, band width, baud rate, bit

rate

5 April/May-18

12 Sketch the electromagnetic spectrum and mark the

major segments

5 April/May-18

13 Differentiate half duplex and full duplex communication

5 April/May-18

14 Illustrate diode amplitude modulation with circuit and wave forms

8 April/May-18

15 Define TDM & FDM 2 April/May-18 16 Explain the basic communication system with the

help of block diagram.

5 Nov/Dec-18

17 Explain the diode amplitude modulator with circuit

diagram.

5 Nov/Dec-18

18 Define baseband transmission and modulation 4 Nov/Dec-18

19 Explain the working of diode detector circuit diagram with wave form.

6 Nov/Dec-18

20 Explain with block diagram transmitting end of FDM

system.

8 Nov/Dec-18

21 List the different types of transmission lines. 3 Nov/Dec-18

22 Explain sky wave and space wave propagation with neat diagram.

7 Nov/Dec-18

UNIT-2 : FIBER OPTIC COMMUNICATION 1 State the benefits of fiber optic cables 5 April/May-17

Nov/Dec-17




2 Explain the basic construction of fiber optic cable

with sketch.

5 April/May-17


3 List the advantages of fiber optic cable 5 Nov/Dec-17, April/May-18

4 Explain the working of photodiode optical receiver with neat sketch

5 Nov/Dec-17, Nov/Dec-18

5 Draw the diagram showing the basic elements of fiber optic communication system

5 April/May-18

6 Write the expression for characteristic impedance of co-axial cable.

5 April/May-18, Nov/Dec-18

7 Explain the working of optical transmitter with a diagram.

6 April/May-18

8 List the benefits of fiber optic cable over

conventional electric cable

5 Nov/Dec-18

UNIT-3 : MICROWAVE TECHNIQUES 1 Define the term wave guide explain its working with

sketch.


2 List common types of microwave antennas 5 April/May-17 Nov/Dec-17

3 List common types of cavity resonators with application


4 Explain with the diagram working of horn antenna 5 April/May-17 Nov/Dec-17

5 List the advantages of microwave communication 5 April/May-17 Nov/Dec-17

6 Define 1. Microstrip 2.Strip line 3.Wave guide 5 Nov/Dec-17, April/May-18

7 List the problems faced by conventional semi-conductor components in microwave frequencies &

write the remedies to overcome them.

5 April/May-18

8 Explain with a diagram working of two cavity

klystron amplifier


9 Sketch the strip line and Micro strip used in

microwave communication

5 Nov/Dec-18

UNIT-4 : SATELLITE COMMUNICATION 1 List any four applications of satellite communication 5 April/May-17


2 Explain briefly geo-synchronous orbit of satellite 6 April/May-17 Nov/Dec-17

3 Explain the working of a satellite transponder 5 April/May-17

Nov/Dec-17 4 Draw the block diagram of satellite earth station &

mark each block.

5/10 April/May-17

Nov/Dec-17, Nov/Dec-18 5 Sketch neatly & explain about satellite subsystem 5 April/May-18

Nov/Dec-17 6 Explain the function of each block of satellite sub-

system with a block diagram.

10 Nov/Dec-18

UNIT-5 : MOBILE AND DATA COMMUNICATION 1 Explain differential GPS with a diagram. 5 April/May-17





2 Explain synchronous & asynchronous data

transmission process.

5/3 April/May-17

Nov/Dec-17

3 Define the term modem & explain its operation with

neat sketch.

5 April/May-17


4 Explain with a neat sketch FSK modem. 5 April/May-17,Nov/Dec-17

Nov/Dec-18

5 Explain serial and parallel transmission. 5 April/May-17,April/May-18

Nov/Dec-18

6 Differentiate serial and parallel transmission. 5 Nov/Dec-17, April/May-18

Nov/Dec-18

7 Explain BPSK modulator with diagram. 5 Nov/Dec-17, April/May-18

Nov/Dec-18

8 Explain GSM operation/architecture with a neat block diagram.

5/10 April/May-17,April/May-18

Nov/Dec-18

9 Explain the working of mobile station. 5 April/May-17 10 Compare 2G with 3G GSM system/mobile

communication.

3/4 April/May-18, Nov/Dec-18

UNIT-6 : BASICS OF COMPUTER NETWORKS 1 List the advantages of computer network 5 April/May-17


2 Define topology & explain star topology. 5 April/May-17,April/May-18 3 Describe the characteristics of twisted pair cables in

LAN

5 Nov/Dec-17, April/May-18

4 Explain the functionality of each layer TCP/IP 5 April/May-17,April/May-18 5 List and explain gigabit Ethernet 5 Nov/Dec-17, April/May-18

6 Explain the importance of switches as a networking device.


7 Explain the function performed by bridge with neat diagram.


8 Explain the function performed by gateway, repeater, router in computer network.

5 April/May-18

9 Explain the working of FSK modem with diagram. 5 April/May-18

10 Explain the working of wireless access point (WAP) with a diagram.

5 April/May-18

11 Compare cat 5e with cat 6 transmission media 5 April/May-17 12 List advantages & disadvantages of star network

topology.


13 Explain different network topology. 5 April/May-17

14 Draw the TCP/IP model layer diagram. 5 Nov/Dec-18 15 Define with an example to each:

i) LAN ii) MAN iii) WAN

6 Nov/Dec-18

16 List the different types of Ethernets. 4 Nov/Dec-18

Professional Ethics & Indian Constitution [15EE55T]

Question Bank – Unit Wise Department of Electrical & Electronics Engineering , Jain Polytechnic, Belagavi Page 1

Unit – 1 HUMAN VALUES

S

No Questions Marks Appeared in

1 Distinguish between 'morality 'and 'ethics' 5 Nov./Dec. 2017

2 List the various actions of an engineer leading to dishonesty 5 Nov./Dec. 2017

3 (a) List the civic virtues one should develop. 4

(b) List the benefits of empathy. 6+4 Nov./Dec. 2017

4 List the different types of values and give few examples for each 5 Apr./May. 2018

5 Define co-operation. What are the impediments to co-operation 5 Apr./May. 2018

6 (a) Distinguish between Morality and Ethics.

(b) Define service learning and discuss on its key components 5+5 Apr./May. 2018

7

(a) Define self-confidence and state the factors that shape the

self-confidence in a person.

(b) List different ethical theories and explain any one in detail.

5+5 Apr./May. 2018

UNIT –2 ENGINEERING ETHICS

1

Define the following terms : = 5

(a) Autonomy

(b) Authority

(c) Self respect

(d) Self esteem

(e) Corporate responsibility

1 x 5 =

5 Nov./Dec. 2017

2 Describe the various situations when moral dilemma arise and

state the various steps to solve moral dilemma 10 Nov./Dec. 2017

3 Stste the characteristics of a professional 5 Apr./May. 2018

4

(a) What is moral dilemma ? List the situations in which moral

dilemma arise. .

(b) Describe occupational crime

5+5 Apr./May. 2018

UNIT-3 SAFETY, RESPONSIBILITIES OF ENGINEERS

1 Name the techniques to reduce risk. 5 Nov./Dec. 2017



2 Describe the various virtues fulfilled under professional

responsibility 10 Nov./Dec. 2017

3 Name few techniques to reduce risk 5 Apr./May. 2018

Unit - 4 ETHICAL ISSUES IN ENGINEERING PRACTICE

1 State the duties of an Engineer as an Experimenter in

environmental ethics 5 Nov./Dec. 2017

2 Discuss the different types of problems in computer ethics 10 Nov./Dec. 2017

3 List the ill-effects of e-waste disposal on environment 5 Apr./May. 2018

4 Explain the code of ethics followed in the Institute of Electrical

and Electronics Engineers 10 Apr./May. 2018

UNIT –5HUMAN RIGHTS

1 State the constitutional provisions under Human Rights 5 Nov./Dec. 2017

2

(a) List the principles of conflict resolution.

(b) Define:

(i) Patent

(ii) Trade Mark

(iii) Trade Secret

4+6 Nov./Dec. 2017

3 Describe the steps taken to eliminate discrimination against

women in various fields 10 Nov./Dec. 2017

4 Describe patent and trade mark 5 Apr./May. 2018

5 (a) State the provisions under professional rights. 5

(b) Describe briefly copyright 5+5 Apr./May. 2018

6 Explain the Sexual Harassment at Work Place Bill - 2006. 10 Apr./May. 2018

UNIT – 6 INDIAN CONSTITUTION

1 State the powers of President. 5 Nov./Dec. 2017

2 Explain the directive principles of state policy. 5 Nov./Dec. 2017

3 Describe the federalism in Indian Constitution with division of

powers 10 Nov./Dec. 2017

4 Enumerate the composition and functions of Legislative 10 Nov./Dec. 2017



Assembly

5 Discuss the composition and functions of City Corporation. 10 Nov./Dec. 2017

6 List the salient features of Indian Constitution 5 Apr./May. 2018

7 State the functions of presiding officer of Lok Sajbha. 5 Apr./May. 2018

8 List the functions of Zilla Panchayat 5 Apr./May. 2018

9 State the Preamble and explain its significance.

10

15. (a) Explain the importance of

(i) Question Hour

(ii) Zero Hour

(b) State the functions of Election Commission of India.

4+6 Apr./May. 2018

11

Explain the formation and function of Supreme Court of India.

Write short note on :

a) Division of powers

b) Issues in Computer Ethics

5+5 Apr./May. 2018

transformers & ac motors [15ee41t ] · 2018. 12. 30. · transformers & ac motors [15ee41t ]...

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