INSTRUMENTATION 1. It provides volts/div adjustment to reduce the display amplitude by a fa ctor of 2.5. VERNIER KNOB 2.

The construction of a dual CRT with two complete electron guns contained in a single tube. This termed as DUAL BEAM OSCILLOSCOPE 3. An AC Bridge Circuit where it seems to determine the unknown capacitance and their losses. WIEN BRIDGE 4. 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 fo r the best position for viewing. POSITION CONTROL 6. The ip meters are used to measure resonant frequency of a parallel reson ant circuit. - COLPITTS OSCILLATOR 7. 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 NOISE 9. An indicating instrument whose movable coils rotate between two stationa ry coils, usually used as wattmeter. ELECTRODYNAMOMETER 10. What complex figures may be produced with sine waves having different fr equencies. LISSAJOUS FIGURES 11. The potential at the screen in the helix of the display of an oscillosco pe is typically 12kV. 12. Voss McCartney noise generator produces a sequence of randomly modulated SQUARED PULSES 13. A utility meter goes directly from the number of watts being used at tha t time 14. In indicating instruments what is the most efficient way of damping? EDD Y CURRENT DAMPING 15. One important advantage of an electrostatic meter is that IT CAN DETECT AC VOLTAGES 16. A 2kHz, 0.5 V square wave output may be taken from this terminal for use in calibrating attenuator probes PROBE ADJ 17. The thickness of a trace is approximately 5% of 1 vertical division 18. A cable fault where the insulation gets damaged and the current starts f lowing from core to earth or to cable sheath earth fault 19. A secondary electrons are collected by a graphic coating termed - AQUAD AG 20. 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 dis play the waveform REAL TIME SAMPLING 21. It allows Channel A input, Channel B input or both to be displayed on th e screen VERTICAL DISPLAY A AND B 22. What damping method is generally used in dynamometer? AIR FRICTION 23. It is formed by depositing a coating of phosphor material on the side of a tube SCREEN OF CRT 24. To measure the power supply voltage used by a circuit a voltmeter is pla ced in parallel with the circuit that works from the supply 25. An oscilloscope cannot be used to indicate ENERGY 26. Grip dip meters use what active device? VACUUM TUBE 27. A 60hHz power line frequency meter using a vibrating wave type may indic ate a frequency from - 58Hz 62 Hz 28. The measurement accuracy of a time base becomes ___________ when the tim e 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 INCREASE 30. This instrument measures temperature by electric means especially temper atures beyond mercury thermometer PYROMETER 31. Instruments that gives the quantity to be measured in terms of instrumen t constant and temperature ABSOLUTE INSTRUMENTS 32. Is the best range used for precise measurement of inductance over a wide range ANDERSON BRIDGE 33. Is a type of signal generator optimized for the use of audio application

s tone generator 34. Which loop test that has the provision of measuring the total loop resis tance VARLEY LOOP TEST 35. The electrons are accelerated again after they pass between deflecting p lates POST DEFLECTION ACCELERATION 36. The two inputs are alternately and repeatedly traced on a scribed it is said to be operating in ALTERNATE MODE 37. The meter movement in an illumination meter measures VOLTAGE 38. it is designed solely for tracing device characteristics that are commer cially available CURVE TRACERS 39. 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 magni fier expands the horizontal display by a factor of 5. - 25nsec/div 40. 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 FINDER 43. It is essentially a flat frequency response noise source and will quickl y show any anomalies in speaker systems, room acoustics and cross over networks PINK NOISE GENERATOR 44. The main advantage of FETVM over a conventional voltmeter is the fact th at FETVM - draws less current from the circuit 45. The waveform under investigation are already displayed in the screen whi ch is protected with a calibrated flat piece hard plastic called- GRATICULE 46. What ammeter is frequently used in measuring high frequency currents? THERMOCOUPLE 47. Technically, RF Field Strength meter detects the electric field of radio and microwaves at what frequency? 0.5 MHz to 3MHz 48. What ammeter is frequently used in measuring high frequency currents? THERMOCOUPLE 49. Technically, RF Field Strength meter detects the electric field of radio and microwaves at what frequency? 0.5 MHz to 3MHz 50. The grid potential control is also known as BRIGHTNESS CONTROL 51. Because of the ten-fold attenuation of attenuation probes this probe is usually referred to as 10:1 probe 52. A grid is composed of nickel cup 53. What is that device which depends on the action of a movable permanent m agnet in aligning itself in the resultant field produced either by a fixed perma nent magnet and an adjacent coil or coils carrying current or by two or more cur rent-carrying coils whose axes are displaced by a fixed angle? - moving-magnet i nstrument 54. Moving iron instrument have a scale function that is squared 55. Is an adjustable period of time during which the oscilloscope cannot tri gger this feature is useful when you are triggering complex waveform shapes so t hat the oscilloscope only triggers on the first eligible point TRIGGER HOLD OFF 56. Most RF meter can use which antennas? A, B, C a. Logarithmic periodic antenna b. Ultra broadband isotropic c. Telescopic antenna 57. The sawtooth voltage of a horizontal sweep generator is produced by swee p generators circuit 58. 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 b y ______ with each increasing octave 3dB 60. A thermal type of maximum demand that is based on the effect of increasi ng temperature WRIGHT MAXIMUM DEMAND INDICATOR 61. 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 wi dth that can be displayed without noticeable distortion being introduced by the combination of Rs and Ci - 1.09microsecond 62. The grid potential is adjustable to approximately -2000V to -2050V 63. A device used to mechanically measure the output power of a motor.- DYNA MOMETER 64. A3 and A1 focusing electrodes are held as GROUND POTENTIAL 65. It continuously adjusts the triggering point of the input wave trigger l evel 66. The voltage required to produce 1 division of deflection at the screen i s referred to as DEFLECTION FACTOR 67. it determines the number of horizontal divisions occupied by each cycle of the displayed wave horizontal time/div 68. Which dynamometer instrument has a uniform scale WATTMETER 69. The focusing electrodes A1, A2 and A3 are sometimes referred to as elec tron lens 70. it defines the highest and lowest waveform frequency of an oscilloscope that may be displayed with no more than 3 dB of attenuation frequency response 71. the Schmitt is designed to have upper and lower trigger points slightly above and below this is called zero crossing detector 72. the Schmitt generator is composed of 2 major components namely NON INVER TING, SCHMITT TRIGGER CIRCUIT 73. Which of the following will not cause a major error in an ohmmeter mete r - a small change in the resistance to be measured 74. Calculate the value of C1 required to compensate a 10:1 probe when the o scilloscope input capacitance is 30 pF and the coaxial capacitance is 100pF 14.4 pF 75. An ammeter shunt is useful because it allows measurement for wide range of currents 76. Voltmeters should generally have LARGE INTERNAL RESISTANCE 77. What test is used to locate the ground fault of a signal cable LAVIER S TES T 78. To use an analog oscilloscope, we need to adjust what basic setting to a ccommodate an incoming signal A, B, C only a. Reclination or amplification of the signal b. The time base c. The triggering of the oscilloscope d. The focus and intensity control 79. A typical frequency counter is usually accurate to 6 digits or more 80. The triode section of a tube is usually consist of any of these: grid an ode cathode 81. Maxwell s bridge is very suitable for accurate measurement of medium induc tance 82. In a moving coil ammeter, a ________ is connected in series with the coi l to compensate for temperature variations - swamping resistor 83. It is an internal triggering force which means that the time base is tri ggered from one of the input waveforms. INT button 84. In digital oscilloscope, the number of waveform points used to make a wa veform record is called the RECORD LENS 85. 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 wit h high input impedance 88. It s an electrostatic voltmeter in which an assembly of figure 8 shape met al plates rotates between the plates of a stationary assembly when the voltage i s applied between the assemblies the length of the arc of rotation is proportion al to the electrostatic attraction and thus to the applied voltage KELVIN VOLTME TER 89. The change in the direction of a compass needle when a current carrying

wire is brought near is ELECTROMAGNETIC DEFLECTION 90. A blank is a device that produces simple repetitive waveforms function g enerator 91. In digital oscilloscopes, the sample points from A, B, C are stored in m emory as WAVEFORM POINTS 92. A V.U. meter is never used in measurements of energy 93. It is defined as the amplitude of the input voltage that may be displaye d on the screen sensitivity 94. The bridge circuit that is best to be used if the phase angle of the ind uctance under test is large- HAY BRIDGE 95. For a waveform with the peak to peak amplitude 5 screen divisions this g ives a reading accuracy of - +/-1% 96. most oscilloscopes have a rear connection for intensity modulation input s this is usually termed as z-axis modulation 97. the force between two electrically charged objects is called ELECTROSTAT IC FORCE 98. it connects the input signal and ground to the input terminal that allow s each trace to be set to a convenient 0 position on screen GROUND BUTTONS 99. the central conductor carries the input signal and the circular conduct or is grounded so that it acts as a screen to help prevent unwanted signals to b e picked up by the oscilloscope input this referred to as 1:1 probe 100. error in ohmmeter reading is due to battery aging 101. this instrument refers to the one which measures the intensity of radiat ion received from any portion of the sky - PYRANOMETER 102. RF meter is/or usually used mainly - to quickly spot rf distribution sy stem problems 103. A2 is sometimes referred to as FOCUS RING 104. It is used to focus the control to a fine line FOCUS CONTROL 105. What damping method is used in induction type ammeters ELECTROSTATIC DAM PING 106. The result of potential difference between anodes is that EQUIPOTENTIAL LINES 107. Induction type instruments are mostly used as watt power meter 108. Instruments use deflection gives the magnitude of electrical quantity to be measured directly secondary instruments 109. 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 ________ shou ld be used AYRTON SHUNT 112. RF field strength meter expresses the field strength as power density f rom 0.001 2000 microwatts /square cm 113. Situated between the horizontal and vertical plates ISOLATION SHIELD 114. Used to adjust the brightness of the display INTENSITY CONTROL 115. A Kelvin electrostatic voltmeter uses what method of damping? - fluid fr iction 116. Dynamometers are mostly used as - wattmeter 117. Phosphors used on the screens are - insulators 118. Which bridge circuit that determines the unknown capacitance in terms of its capacitance and resistance Owen Bridge 119. The two inputs are alternately and repeatedly traced on a scribed but us es a much higher switching frequency CHOP MODE 120. Cathode is typically held at approximately: -2kV 121. Multitone generator outputs several tone simultaneously and are used to check for intermodulation distortion 122. A2 potential is adjustable around: -2kV 123. The meter movement in an elimination meter measures voltage 124. Torque produced due to the effects of current or voltage in instruments DEFLECTING TORQUE 125. RF Meters has a resolution of about 0.1Hz-10Hz 126. 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/V 128. For a dynamometer to be able to measure high current, a ___ should be us ed. - current transformer 129. One advantage of electromagnet meter over a permanent magnet meter is th at - the electromagnet meter is more rugged. 130. Electrical instruments below is the most sensitive PMMC 131. What is this measuring instrument that uses the force of repulsion betwe en fixed and movable magnetized iron vanes, or the force between a coil and a pi voted vane-shaped piece of soft iron to move the indicating pointer? - vane-type instrument 132. A sophisticated signal generator which allows the user to generate arbit rary waveforms within published limits of frequency range, accuracy and output l evel arbitrary waveform generators. 133. In using noise generators we cannot reconnect the generator to your prea mplifier and slowly advance the level control until the sound level is at about: 65 dB 134. Which of the ammeter below has the no insertion error CLAMP METER 135. Attenuator probes attenuates the signal usually by a factor of 10 136. A cathode is composed of nickel 137. The bridge circuit is used to determine the unknown capacitance by compa ring 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 t he 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