MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 250 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The most common application of float system is |
| A. | To monitor the fuel tank level in motor vehicle |
| B. | To monitor the flow of solid |
| C. | To monitor the flow of liquid |
| D. | All of these |
| Answer» B. To monitor the flow of solid | |
| 52. |
The microcomputer performs its computations in |
| A. | Analogue form |
| B. | Digital form |
| C. | Either analogue form or digital form depending on their applications |
| D. | None of these |
| Answer» C. Either analogue form or digital form depending on their applications | |
| 53. |
The method / methods suitable for the measurement of low resistance is / are |
| A. | Ammeter - voltmeter method |
| B. | Kelvin’s double bridge method |
| C. | Potentiometer method |
| D. | All of these |
| Answer» E. | |
| 54. |
The meter of a vibrating reed frequency meter depends for its indications on the |
| A. | Electrical resonance of thin flat steel reeds |
| B. | Mechanical resonance of thin flat steel reeds |
| C. | Mechanical resonance of thick flat steel reeds |
| D. | Electrical resonance of thick flat steel reeds |
| Answer» C. Mechanical resonance of thick flat steel reeds | |
| 55. |
The measurements which can be simplified by using X - Y recorders is / are |
| A. | Speed - torque characteristics of motors |
| B. | Regulation curves of power supplies |
| C. | Hysteresis curves |
| D. | All of these |
| Answer» E. | |
| 56. |
The measurement range of digital voltmeter is |
| A. | ± 1V to ± 1MV |
| B. | ± 1V to ± 1kV |
| C. | ± 1kV to ± 1MV |
| D. | ± 100 kV to ± 100MV |
| Answer» B. ± 1V to ± 1kV | |
| 57. |
The Maxwell’s Inductance - Capacitance bridge is not suitable for the measurement inductance of coil if the Q factor is |
| A. | Less than 1 |
| B. | Between 1 to 10 |
| C. | More than 10 |
| D. | Both (a) and (c) |
| Answer» E. | |
| 58. |
The magnitude of environment - induced variation from the specified calibration condition is quantified by |
| A. | Sensitivity drift |
| B. | Zero drift |
| C. | Backlash |
| D. | Both (a) & (b) |
| Answer» E. | |
| 59. |
The Lissajous patterns help in the measurement of |
| A. | Phase difference between two sine wave |
| B. | Frequency of one waveform if the frequency of other waveform is known |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 60. |
The linear variable differential transformer transducer is |
| A. | Inductive transducer |
| B. | Non - inductive transducer |
| C. | Capacitive transducer |
| D. | Resistive transducer |
| Answer» B. Non - inductive transducer | |
| 61. |
The light emitted by the zinc silicate coated fluorescent screen of cathode ray tube is usually of |
| A. | Green colour |
| B. | Yellow colour |
| C. | Blue colour |
| D. | White colour |
| Answer» B. Yellow colour | |
| 62. |
The ionization gauge an instrument used for the measurement of |
| A. | Very low pressure |
| B. | Medium pressure |
| C. | High pressure |
| D. | Very high pressure |
| Answer» B. Medium pressure | |
| 63. |
The instruments used for the measurement of pressure is / are |
| A. | Bellows |
| B. | Diaphragms |
| C. | Fiber optic pressure sensors |
| D. | All of these |
| E. | None of the above |
| Answer» E. None of the above | |
| 64. |
The instrument which works only with DC is |
| A. | Electrolytic motor |
| B. | Mercury motor |
| C. | Induction motor |
| D. | Both (a) and (b) |
| E. | None of these |
| Answer» E. None of these | |
| 65. |
The instrument which can be used only with the D.C. supply is |
| A. | PMMC instrument |
| B. | Electrodynamometer instrument |
| C. | Hot - wire instrument |
| D. | Split phase induction type instrument |
| Answer» B. Electrodynamometer instrument | |
| 66. |
The induction type single - phase watt - hour meters uses |
| A. | Control spring |
| B. | Pointer |
| C. | Brake magnet and spindle |
| D. | All of these |
| Answer» D. All of these | |
| 67. |
The indicating instruments with linear scale is |
| A. | PMMC |
| B. | Electrostatic instrument |
| C. | Dynamometer instrument |
| D. | Thermocouple instrument |
| Answer» B. Electrostatic instrument | |
| 68. |
The high resistances are found in |
| A. | Insulation resistance of cables and wires |
| B. | Resistance of shunt field winding and the multipliers |
| C. | Resistance of armature windings of electrical machine |
| D. | Resistance of series field winding of a dc machine |
| Answer» B. Resistance of shunt field winding and the multipliers | |
| 69. |
The heater wire of thermocouple instruments are made of smaller area of cross section to |
| A. | reduce the skin effect |
| B. | reduce temperature error |
| C. | reduce frequency error |
| D. | increase inductance |
| Answer» B. reduce temperature error | |
| 70. |
The gravity controlled instruments has to be kept |
| A. | Vertical |
| B. | Horizontal |
| C. | Inclined at 45 degree |
| D. | Inclined at 75 degree |
| Answer» B. Horizontal | |
| 71. |
The full scale current of a galvanometer with internal resistance of 800 ohm is 8 A. what will be the multiplying power of 80 ohm shunt with this galvanometer? |
| A. | 8 |
| B. | 9 |
| C. | 10 |
| D. | 11 |
| Answer» E. | |
| 72. |
The full range of audibility in audio frequency oscillator is |
| A. | 0 to 20 Hz |
| B. | 20 Hz to 2 kHz |
| C. | 20 Hz to 20 kHz |
| D. | 20 Hz to 20 MHz |
| Answer» D. 20 Hz to 20 MHz | |
| 73. |
The frequency errors in induction instruments can be compensated by the use of |
| A. | Non inductive shunt in both ammeters and voltmeters |
| B. | Non inductive shunt in case of ammeters and are generally self compensated in case of voltmeters |
| C. | Self compensated in case of both ammeters and voltmeters |
| D. | Self compensated in case of ammeters and non inductive shunt in case of voltmeters |
| Answer» C. Self compensated in case of both ammeters and voltmeters | |
| 74. |
The frequency and supply voltage of induction wattmeters are |
| A. | Constant, constant |
| B. | Constant, variable |
| C. | Variable, constant |
| D. | Variable, variable |
| Answer» B. Constant, variable | |
| 75. |
The flow meter which is replacing the differential pressure meters in its applications is |
| A. | Vortex - shedding flow meters |
| B. | Electromagnetic flow meters |
| C. | Ultrasonic flow meters |
| D. | All of these |
| Answer» B. Electromagnetic flow meters | |
| 76. |
The example of low resistance is / are |
| A. | Resistance of armature windings of electrical machine |
| B. | Resistance of series field winding of a dc machine |
| C. | Resistances of shunts and lead wires |
| D. | All of these |
| Answer» E. | |
| 77. |
The error between mean of finite data set and mean of infinite data set is known as |
| A. | True error of the mean |
| B. | Standard error of the mean |
| C. | Finite error |
| D. | Infinite error |
| Answer» C. Finite error | |
| 78. |
The electrostatic effect is utilized for |
| A. | Ammeters |
| B. | Voltmeters |
| C. | D.C. ampere - hour meters |
| D. | Wattmeters |
| Answer» C. D.C. ampere - hour meters | |
| 79. |
The electromagnetic effect is generally utilized for |
| A. | Ammeters |
| B. | Voltmeters |
| C. | Wattmeters and watt - hour meters |
| D. | All of these |
| Answer» E. | |
| 80. |
The electrodynamic frequency meters have |
| A. | Linear scale and their readings does not depends on voltage |
| B. | Linear scale and their readings depends on voltage |
| C. | Non linear scale and their readings does not depends on voltage |
| D. | Non linear scale and their readings depends on voltage |
| Answer» B. Linear scale and their readings depends on voltage | |
| 81. |
The dynamometer wattmeters are |
| A. | More accurate on DC supply |
| B. | More accurate on AC supply |
| C. | Equally accurate on both AC and DC supply |
| D. | None of these |
| Answer» D. None of these | |
| 82. |
The displacement measuring instruments is / are |
| A. | Potentiometer |
| B. | LVDT |
| C. | RVDT |
| D. | All of these |
| Answer» E. | |
| 83. |
The different types of analog recorders are |
| A. | Graphic recorders |
| B. | Oscillographic recorders |
| C. | Magnetic tape recorders |
| D. | All of these |
| Answer» E. | |
| 84. |
The dielectric loss of pure capacitor is equal to |
| A. | 1 |
| B. | 0 |
| C. | Maximum |
| D. | None of these |
| Answer» C. Maximum | |
| 85. |
The devices used for flow obstruction is / are |
| A. | Orifice plate |
| B. | Venturi tube |
| C. | Flow nozzle and dall flow tube |
| D. | All of these |
| Answer» E. | |
| 86. |
The detectors used in optical sensors is |
| A. | Photodiodes |
| B. | Phototransistors |
| C. | Laser |
| D. | Only (a) and (b) |
| E. | All the above |
| Answer» E. All the above | |
| 87. |
The deflecting torque in a permanent magnet moving coil type instrument is |
| A. | Directly proportional to the angle of deflection of moving system |
| B. | Directly proportional to the current flowing through it |
| C. | Directly proportional to the current flowing through it |
| D. | Inversely proportional to the current flowing through it |
| Answer» C. Directly proportional to the current flowing through it | |
| 88. |
The deflecting torque in a moving coil instrument is |
| A. | Directly proportional to the current flowing through it |
| B. | Inversely proportional to the current flowing through it |
| C. | Inversely proportional to the square of current flowing through it |
| D. | Directly proportional to the square of current flowing through it |
| Answer» E. | |
| 89. |
The current sensitive instruments are |
| A. | PMMC |
| B. | Hot wire instruments |
| C. | Electrostatic instruments |
| D. | Both (a) and (b) |
| Answer» E. | |
| 90. |
The commonly used detector(s) in AC bridges is / are |
| A. | Head phones |
| B. | Vibration galvanometers |
| C. | Tuned amplifiers, head phones |
| D. | Head phones, tuned amplifiers, vibration galvanometers |
| Answer» E. | |
| 91. |
The bridge suitable for the measurement of capacitance is / are |
| A. | Anderson’s bridge |
| B. | Hay’s bridge |
| C. | Owen’s bridge |
| D. | None of these |
| Answer» E. | |
| 92. |
The accuracy of the deflection type instruments and of the null type instruments depends on |
| A. | Linearity, calibration of spring |
| B. | Calibration of spring, linearity and calibration of weights |
| C. | Linearity and calibration of spring, calibration of weights |
| D. | Both depends on calibration of weight |
| Answer» D. Both depends on calibration of weight | |
| 93. |
The accuracy in a bridge measurement depends on |
| A. | Sensitivity of detector |
| B. | Applied voltage |
| C. | Accuracy of indicator |
| D. | Both (a) and (b) |
| Answer» E. | |
| 94. |
The AC Bridge used for the measurement of inductance is / are |
| A. | Maxwell’s inductance bridge |
| B. | Hay’s bridge |
| C. | Anderson’s bridge, Owen’s bridge |
| D. | All of these |
| E. | None of these |
| Answer» E. None of these | |
| 95. |
Resolver works on the principal of mutual inductance variation. It is mainly used for the measurement of |
| A. | Linear displacement |
| B. | Non - linear displacement |
| C. | Rotary motion |
| D. | All of these |
| Answer» D. All of these | |
| 96. |
Resolution of an instrument is specified as an |
| A. | Absolute value |
| B. | Percentage of full scale deflection |
| C. | Either (a) or (b) |
| D. | None of these |
| Answer» D. None of these | |
| 97. |
Range or span of an instrument defines the |
| A. | Minimum value of quantity that the instrument is designed to measure |
| B. | Maximum value of quantity that the instrument is designed to measure |
| C. | Both minimum and maximum value of quantity that the instrument is designed to measure |
| D. | None of these |
| Answer» D. None of these | |
| 98. |
Random errors in a measurement system are due to |
| A. | Environmental changes |
| B. | Use of uncalibrated instrument |
| C. | Poor cabling practices |
| D. | Unpredictable effects |
| Answer» E. | |
| 99. |
Q meter is used to measure the properties of |
| A. | Inductive coils |
| B. | Non inductive coils |
| C. | Capacitive coils |
| D. | Both (a) and (c) |
| Answer» E. | |
| 100. |
Primary current in a current transformer is determined by |
| A. | The load on the system |
| B. | The load on its own secondary |
| C. | The load on its own primary |
| D. | All of these |
| Answer» B. The load on its own secondary | |