INSTRUMENTATION1. It provides volts/div adjustment to reduce the display amplitude by a factor of 2.5. �VERNIER KNOB2. The construction of a dual CRT with two complete electron guns contained in a single tube. This termed as � DUAL BEAM OSCILLOSCOPE3. An AC Bridge Circuit where it seems to determine the unknown capacitance and their losses. WIEN BRIDGE4. Basically a power meter that can be constructed from � ELECTRODYNAMOMETER.5. Its purpose is to move each waveform up and down vertically to set it for the best position for viewing. POSITION CONTROL6. The ip meters are used to measure resonant frequency of a parallel resonant circuit. - COLPITTS OSCILLATOR7. Most RF meters have isolation of about � 0.1 Hz to 10 Hz.8. The sound heard when a TV is tuned to a non-existent station � WHITE NOISE9. An indicating instrument whose movable coils rotate between two stationary coils, usually used as wattmeter. � ELECTRODYNAMOMETER10. What complex figures may be produced with sine waves having different frequencies. LISSAJOUS FIGURES11. The potential at the screen in the helix of the display of an oscilloscope is typically 12kV.12. Voss McCartney noise generator produces a sequence of randomly modulated � SQUARED PULSES13. A utility meter goes directly from � the number of watts being used at that time14. In indicating instruments what is the most efficient way of damping? � EDDY CURRENT DAMPING15. One important advantage of an electrostatic meter is that � IT CAN DETECT AC VOLTAGES16. A 2kHz, 0.5 V square wave output may be taken from this terminal for use in calibrating attenuator probes � PROBE ADJ17. The thickness of a trace is approximately � 5% of 1 vertical division18. A cable fault where the insulation gets damaged and the current starts flowing from core to earth or to cable sheath � earth fault19. A secondary electrons are collected by a graphic coating termed - AQUADAG20. A sampling that is used in digital oscilloscope that only collects a few sample points of the signal in a single pass and then uses interpolation to display the waveform � REAL TIME SAMPLING21. It allows Channel A input, Channel B input or both to be displayed on the screen � VERTICAL DISPLAY A AND B22. What damping method is generally used in dynamometer? � AIR FRICTION23. It is formed by depositing a coating of phosphor material on the side of a tube � SCREEN OF CRT24. To measure the power supply voltage used by a circuit a voltmeter � is placed in parallel with the circuit that works from the supply25. An oscilloscope cannot be used to indicate � ENERGY26. Grip dip meters use what active device? � VACUUM TUBE27. A 60hHz power line frequency meter using a vibrating wave type may indicate a frequency from - 58Hz � 62 Hz28. The measurement accuracy of a time base becomes ___________ when the time base magnifier is set to its maximum position. - +/- 7%29. Suppose a certain current in a galvanometer causes the needle to deflect 20o and then this current is doubled the needle deflection � WILL INCREASE30. This instrument measures temperature by electric means especially temperatures beyond mercury thermometer � PYROMETER31. Instruments that gives the quantity to be measured in terms of instrument constant and temperature � ABSOLUTE INSTRUMENTS32. Is the best range used for precise measurement of inductance over a wide range � ANDERSON BRIDGE33. Is a type of signal generator optimized for the use of audio application

s � tone generator34. Which loop test that has the provision of measuring the total loop resistance � VARLEY LOOP TEST35. The electrons are accelerated again after they pass between deflecting plates � POST DEFLECTION ACCELERATION36. The two inputs are alternately and repeatedly traced on a scribed it is said to be operating in � ALTERNATE MODE37. The meter movement in an illumination meter measures � VOLTAGE38. it is designed solely for tracing device characteristics that are commercially available � CURVE TRACERS39. Determine the minimum time/division sensitivity for an oscilloscope that is to be used to investigate a 50 MHz waveform. Assume that the time base magnifier expands the horizontal display by a factor of 5. - 25nsec/div40. The input impedance of the oscilloscope at the front panel is typically 1M? in parallel with 30 pF.41. To increase the measuring capability of a moving iron ac ammeter a __________ should be used � different number of turns of operating coil.42. It is used to locate a display that has been shifted off the screen � BEAM FINDER43. It is essentially a flat frequency response noise source and will quickly show any anomalies in speaker systems, room acoustics and cross over networks � PINK NOISE GENERATOR44. The main advantage of FETVM over a conventional voltmeter is the fact that FETVM - draws less current from the circuit45. The waveform under investigation are already displayed in the screen which is protected with a calibrated flat piece hard plastic called- GRATICULE46. What ammeter is frequently used in measuring high frequency currents? - THERMOCOUPLE47. Technically, RF Field Strength meter detects the electric field of radio and microwaves at what frequency? � 0.5 MHz to 3MHz48. What ammeter is frequently used in measuring high frequency currents? - THERMOCOUPLE49. Technically, RF Field Strength meter detects the electric field of radio and microwaves at what frequency? � 0.5 MHz to 3MHz50. The grid potential control is also known as � BRIGHTNESS CONTROL51. Because of the ten-fold attenuation of attenuation probes this probe is usually referred to as � 10:1 probe52. A grid is composed of � nickel cup53. What is that device which depends on the action of a movable permanent magnet in aligning itself in the resultant field produced either by a fixed permanent magnet and an adjacent coil or coils carrying current or by two or more current-carrying coils whose axes are displaced by a fixed angle? - moving-magnet instrument54. Moving iron instrument have a scale function that is � squared55. Is an adjustable period of time during which the oscilloscope cannot trigger this feature is useful when you are triggering complex waveform shapes so that the oscilloscope only triggers on the first eligible point � TRIGGER HOLD OFF56. Most RF meter can use which antennas? �A, B, Ca. Logarithmic periodic antennab. Ultra broadband isotropicc. Telescopic antenna57. The sawtooth voltage of a horizontal sweep generator is produced by � sweep generators circuit58. Which of the following is not a function of a fuse? � to be sure there is enough current available for an appliance to work right.59. White noise has a frequency characteristic that traces the power level by ______ with each increasing octave � 3dB60. A thermal type of maximum demand that is based on the effect of increasing temperature � WRIGHT MAXIMUM DEMAND INDICATOR61. A pulse waveform with 3.3kohms noise resistance is to be displayed on an

oscilloscope with an input capacitance of 15pF. Determine the shortest pulse width that can be displayed without noticeable distortion being introduced by the combination of Rs and Ci - 1.09microsecond62. The grid potential is adjustable to approximately - -2000V to -2050V63. A device used to mechanically measure the output power of a motor.- DYNAMOMETER64. A3 and A1 focusing electrodes are held as GROUND POTENTIAL65. It continuously adjusts the triggering point of the input wave � trigger level66. The voltage required to produce 1 division of deflection at the screen is referred to as DEFLECTION FACTOR67. it determines the number of horizontal divisions occupied by each cycle of the displayed wave � horizontal time/div68. Which dynamometer instrument has a uniform scale � WATTMETER69. The focusing electrodes A1, A2 and A3 are sometimes referred to as � electron lens70. it defines the highest and lowest waveform frequency of an oscilloscope that may be displayed with no more than 3 dB of attenuation � frequency response71. the Schmitt is designed to have upper and lower trigger points slightly above and below this is called � zero crossing detector72. the Schmitt generator is composed of 2 major components namely � NON INVERTING, SCHMITT TRIGGER CIRCUIT73. Which of the following will not cause a major error in an ohmmeter meter - a small change in the resistance to be measured74. Calculate the value of C1 required to compensate a 10:1 probe when the oscilloscope input capacitance is 30 pF and the coaxial capacitance is 100pF � 14.4pF75. An ammeter shunt is useful because � it allows measurement for wide range of currents76. Voltmeters should generally have � LARGE INTERNAL RESISTANCE77. What test is used to locate the ground fault of a signal cable �LAVIER�S TEST78. To use an analog oscilloscope, we need to adjust what basic setting to accommodate an incoming signal � A, B, C onlya. Reclination or amplification of the signalb. The time basec. The triggering of the oscilloscoped. The focus and intensity control79. A typical frequency counter � is usually accurate to 6 digits or more80. The triode section of a tube is usually consist of � any of these: grid anode cathode81. Maxwell�s bridge is very suitable for accurate measurement of � medium inductance82. In a moving coil ammeter, a ________ is connected in series with the coil to compensate for temperature variations - swamping resistor83. It is an internal triggering force which means that the time base is triggered from one of the input waveforms. � INT button84. In digital oscilloscope, the number of waveform points used to make a waveform record is called the � RECORD LENS85. The measurement accuracy of the time base is typically stated as - +/- 5%86. The scale of a hot wire instrument is a _____ function � squared 87. Voltage measurement in a high impedance circuit requires a voltmeter with � high input impedance88. It�s an electrostatic voltmeter in which an assembly of figure 8 shape metal plates rotates between the plates of a stationary assembly when the voltage is applied between the assemblies the length of the arc of rotation is proportional to the electrostatic attraction and thus to the applied voltage � KELVIN VOLTMETER89. The change in the direction of a compass needle when a current carrying

wire is brought near is ELECTROMAGNETIC DEFLECTION90. A blank is a device that produces simple repetitive waveforms � function generator91. In digital oscilloscopes, the sample points from A, B, C are stored in memory as � WAVEFORM POINTS92. A V.U. meter is never used in measurements of � energy93. It is defined as the amplitude of the input voltage that may be displayed on the screen � sensitivity94. The bridge circuit that is best to be used if the phase angle of the inductance under test is large- HAY BRIDGE95. For a waveform with the peak to peak amplitude 5 screen divisions this gives a reading accuracy of - +/-1%96. most oscilloscopes have a rear connection for intensity modulation inputs this is usually termed as � z-axis modulation97. the force between two electrically charged objects is called � ELECTROSTATIC FORCE98. it connects the input signal and ground to the input terminal that allows each trace to be set to a convenient 0 position on screen �GROUND BUTTONS99. the central conductor carries the input signal and the circular conductor is grounded so that it acts as a screen to help prevent unwanted signals to be picked up by the oscilloscope input this referred to as � 1:1 probe100. error in ohmmeter reading is due to � battery aging101. this instrument refers to the one which measures the intensity of radiation received from any portion of the sky - PYRANOMETER102. RF meter is/or usually used mainly - to quickly spot rf distribution system problems103. A2 is sometimes referred to as �FOCUS RING104. It is used to focus the control to a fine line FOCUS CONTROL105. What damping method is used in induction type ammeters � ELECTROSTATIC DAMPING106. The result of potential difference between anodes is that � EQUIPOTENTIAL LINES107. Induction type instruments are mostly used as � watt power meter108. Instruments use deflection gives the magnitude of electrical quantity to be measured directly � secondary instruments109. A thermocouple gets warm when a current flows through it 110. The accuracy of V/div sensitivity is typically specified as - +/-3%111. To prevent damage of multirange ammeter during selection a ________ should be used � AYRTON SHUNT112. RF field strength meter expresses the field strength as power density from 0.001 � 2000 microwatts /square cm113. Situated between the horizontal and vertical plates �ISOLATION SHIELD 114. Used to adjust the brightness of the display � INTENSITY CONTROL115. A Kelvin electrostatic voltmeter uses what method of damping? - fluid friction116. Dynamometers are mostly used as - wattmeter117. Phosphors used on the screens are - insulators118. Which bridge circuit that determines the unknown capacitance in terms of its capacitance and resistance � Owen Bridge119. The two inputs are alternately and repeatedly traced on a scribed but uses a much higher switching frequency � CHOP MODE120. Cathode is typically held at approximately: -2kV121. Multitone generator outputs several tone simultaneously and are used to check for intermodulation distortion122. A2 potential is adjustable around: -2kV123. The meter movement in an elimination meter measures � voltage124. Torque produced due to the effects of current or voltage in instruments � DEFLECTING TORQUE125. RF Meters has a resolution of about 0.1Hz-10Hz126. Controlling torque in PMMC - SPRING ACTION

127. If a meter of a full scale of 100mA is used as an ac voltmeter with half rectification its ac sensitivity is 4500 W/V128. For a dynamometer to be able to measure high current, a ___ should be used. - current transformer129. One advantage of electromagnet meter over a permanent magnet meter is that - the electromagnet meter is more rugged.130. Electrical instruments below is the most sensitive � PMMC131. What is this measuring instrument that uses the force of repulsion between fixed and movable magnetized iron vanes, or the force between a coil and a pivoted vane-shaped piece of soft iron to move the indicating pointer? - vane-type instrument132. A sophisticated signal generator which allows the user to generate arbitrary waveforms within published limits of frequency range, accuracy and output level � arbitrary waveform generators.133. In using noise generators we cannot reconnect the generator to your preamplifier and slowly advance the level control until the sound level is at about: 65 dB134. Which of the ammeter below has the no insertion error � CLAMP METER135. Attenuator probes attenuates the signal usually by a factor of 10136. A cathode is composed of � nickel137. The bridge circuit is used to determine the unknown capacitance by comparing it with known standard capacitance - DE SAUTY�S BRIDGE 138. In a test by Murray loop, for ground fault of 500 meters of cable having a resistance of 1?/1meter, the faulty cable is looped with the sound cable of the same length having a resistance of 2.25?/100meter. The ratio of the other two testing networks at balance are in ratio of 2.75:1