MCQOPTIONS
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MCQOPTIONS
This section includes 100 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. |
In an Anderson bridge, the unknown inductance is measured in terms of_______________? |
| A. | known inductance and resistance |
| B. | known capacitance and resistance |
| C. | known resistance |
| D. | known inductance |
| Answer» C. known resistance | |
| 52. |
In an AC. co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be_____________? |
| A. | out of phase by 90° |
| B. | out of phase by 60° |
| C. | out of phase by 30° |
| D. | out of phase by 0° |
| E. | out of phase by 180° |
| Answer» B. out of phase by 60° | |
| 53. |
In a Weston synchronoscope, the fixed coils are connected across_______________? |
| A. | bus-bars |
| B. | incoming alternator |
| C. | a lamp |
| D. | none of the above |
| Answer» C. a lamp | |
| 54. |
In a Weston frequency meter, the magnetic axes of the two fixed coils are__________________? |
| A. | parallel |
| B. | perpendicular |
| C. | inclined at 60° |
| D. | inclined at 120° |
| Answer» C. inclined at 60° | |
| 55. |
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of_________________? |
| A. | 0.1 Hz |
| B. | 0.25 Hz |
| C. | 0.5 Hz |
| D. | 1.5 Hz |
| Answer» D. 1.5 Hz | |
| 56. |
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of___________? |
| A. | 0.1 Hz |
| B. | 0.25 Hz |
| C. | 0.5 Hz |
| D. | 1.5 Hz |
| Answer» D. 1.5 Hz | |
| 57. |
In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________? |
| A. | exactly 0° |
| B. | approximately 0° |
| C. | exactly 90° |
| D. | approximately 90° |
| Answer» D. approximately 90° | |
| 58. |
In a Schering bridge the potential of the detector above earth potential is______________? |
| A. | a few volts only |
| B. | 1 kV |
| C. | 5 kV |
| D. | 10 kV |
| Answer» B. 1 kV | |
| 59. |
In a portable instrument, the controlling torque is provided by_____________? |
| A. | spring |
| B. | gravity |
| C. | eddy currents |
| D. | all of the above |
| Answer» B. gravity | |
| 60. |
In a meggar controlling torque is provided by______________? |
| A. | spring |
| B. | gravity |
| C. | coil |
| D. | eddy current |
| Answer» D. eddy current | |
| 61. |
In a low power factor wattmeter the pressure coil is connected_______________? |
| A. | to the supply side of the current coil |
| B. | to the load side of the current coil |
| C. | in any of the two meters at connection |
| D. | none of the above |
| Answer» C. in any of the two meters at connection | |
| 62. |
In a low power factor wattmeter the compensating coil is connected_______________? |
| A. | in series with current coil |
| B. | in parallel with current coil |
| C. | in series with pressure coil |
| D. | in parallel with pressure coil |
| Answer» D. in parallel with pressure coil | |
| 63. |
In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________? |
| A. | 0° |
| B. | 60° |
| C. | 90° |
| D. | 120° |
| Answer» E. | |
| 64. |
In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________? |
| A. | unity |
| B. | 0.5 |
| C. | 0.3 |
| D. | zero |
| Answer» C. 0.3 | |
| 65. |
In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________? |
| A. | unity |
| B. | 0.8 lagging |
| C. | 0.8 leading |
| D. | zero |
| Answer» B. 0.8 lagging | |
| 66. |
If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is_________________? |
| A. | 10° |
| B. | 80° |
| C. | 120° |
| D. | 170° |
| Answer» B. 80° | |
| 67. |
If an instrument has cramped scale for larger values, then it follows________________? |
| A. | square law |
| B. | logarithmic law |
| C. | uniform law |
| D. | none of the above |
| Answer» C. uniform law | |
| 68. |
If an inductance is connected in one arm of bridge and resistances in the remaining three arms____________? |
| A. | the bridge can always be balanced |
| B. | the bridge cannot be balanced |
| C. | the bridge can be balanced if the resistances have some specific values |
| Answer» C. the bridge can be balanced if the resistances have some specific values | |
| 69. |
For measuring current at high frequency we should use_______________? |
| A. | moving iron instrument |
| B. | electrostatic instrument |
| C. | thermocouple instrument |
| D. | none of the above |
| Answer» D. none of the above | |
| 70. |
For measuring a very high resistance we should use_______________? |
| A. | Kelvin’s double bridge |
| B. | Wheat stone bridge |
| C. | Meggar |
| D. | None of the above |
| Answer» D. None of the above | |
| 71. |
For measurements on high voltage capacitors, the suitable bridge is_______________? |
| A. | Wein bridge |
| B. | Modified De Santy’s bridge |
| C. | Schering bridge |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 72. |
For measurement of mutual inductance we can use________________? |
| A. | Anderson bridge |
| B. | Maxwell’s bridge |
| C. | Heaviside bridge |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 73. |
For measurement of inductance having high value, we should use______________? |
| A. | Maxwell’s bridge |
| B. | Maxwell Wein bridge |
| C. | Hay’s bridge |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 74. |
For handling greater currents induction wattmeters are used in conjunction with______________? |
| A. | potential transformers |
| B. | current transformers |
| C. | power transformers |
| D. | either of the above |
| E. | none of the above |
| Answer» C. power transformers | |
| 75. |
E.m.f. of a Weston cell is accurately measured by________________? |
| A. | electrostatic voltmeter |
| B. | hot wire voltmeter |
| C. | isothermal voltmeter |
| D. | electrodynamic voltmeter |
| Answer» B. hot wire voltmeter | |
| 76. |
Damping of the Ballistic galvanometer is made small to_______________? |
| A. | get first deflection large |
| B. | make the system oscillatory |
| C. | make the system critically damped |
| D. | get minimum overshoot |
| Answer» B. make the system oscillatory | |
| 77. |
Commonly used standard capacitor is______________? |
| A. | spherical type |
| B. | concentric cylindrical type |
| C. | electrostatic type |
| D. | multilayer parallel plate type |
| Answer» C. electrostatic type | |
| 78. |
Commonly used instruments in power system measurement are_______________? |
| A. | induction |
| B. | moving coil or iron |
| C. | rectifier |
| D. | electrostatic |
| Answer» B. moving coil or iron | |
| 79. |
Basically a potentiometer is a device for________________? |
| A. | comparing two voltages |
| B. | measuring a current |
| C. | comparing two currents |
| D. | measuring a voltage |
| E. | none of the above |
| Answer» B. measuring a current | |
| 80. |
An ohmmeter is a____________? |
| A. | moving iron instrument |
| B. | moving coil instrument |
| C. | dynamometer instrument |
| D. | none of the above |
| Answer» C. dynamometer instrument | |
| 81. |
An instrument transformer is used to extend the range of______________? |
| A. | induction instrument |
| B. | electrostatic instrument |
| C. | moving coil instrument |
| D. | any of the above |
| Answer» B. electrostatic instrument | |
| 82. |
An induction wattmeter can be used for_________________? |
| A. | both D.C. and A.C. |
| B. | D.C. only |
| C. | A.C. only |
| D. | any of the above |
| Answer» C. A.C. only | |
| 83. |
An induction meter can handle current up to_____________? |
| A. | 10 A |
| B. | 30 A |
| C. | 60 A |
| D. | 100 A |
| Answer» E. | |
| 84. |
An ammeter is a______________? |
| A. | secondary instrument |
| B. | absolute instrument |
| C. | recording instrument |
| D. | integrating instrument |
| Answer» B. absolute instrument | |
| 85. |
Alternating current is measured by_______________? |
| A. | induction ammeter |
| B. | permanent magnet type ammeter |
| C. | electrostatic ammeter |
| D. | moving iron repulsion type voltmeter |
| Answer» B. permanent magnet type ammeter | |
| 86. |
According to application, instruments are classified as_____________? |
| A. | switch board |
| B. | portable |
| C. | both A. and B. |
| D. | moving coil |
| E. | moving iron |
| Answer» D. moving coil | |
| 87. |
A Weston synchronoscope is a________________? |
| A. | moving coil instrument |
| B. | moving iron instrument |
| C. | dynamometer instrument |
| D. | none of the above |
| Answer» D. none of the above | |
| 88. |
A Weston frequency meter is_____________? |
| A. | moving coil instrument |
| B. | moving iron instrument |
| C. | dynamometer instrument |
| D. | none of the above |
| Answer» C. dynamometer instrument | |
| 89. |
A voltage of about 200 V can be measured__________________? |
| A. | directly by a D.C. potentiometer |
| B. | a D.C. potentiometer in conjunction with a volt ratio box |
| C. | a D.C. potentiometer in conjunction with a known resistance |
| D. | none of the above |
| Answer» C. a D.C. potentiometer in conjunction with a known resistance | |
| 90. |
A universal RLC bridge uses_________________? |
| A. | Maxwell bridge configuration for measurement of inductance and De Santas bridge for measurement of capacitance |
| B. | Maxwell Wein bridge for measurement of inductance and modified De Santy’s bridge for measurement of capacitance |
| C. | Maxwell Wein bridge for measurement of inductance and Wein bridge for measurement of capacitance |
| D. | Any of the above |
| Answer» C. Maxwell Wein bridge for measurement of inductance and Wein bridge for measurement of capacitance | |
| 91. |
A sensitive galvanometer produces large deflection for a_______________? |
| A. | small value of current |
| B. | large value of current |
| C. | large value of power |
| D. | large value of voltage |
| E. | none of the above |
| Answer» B. large value of current | |
| 92. |
A power factor meter has________________? |
| A. | one current circuit and two pressure circuits |
| B. | one current circuit and one pressure circuit |
| C. | two current circuits and one pres¬sure circuit |
| D. | none of the above |
| Answer» B. one current circuit and one pressure circuit | |
| 93. |
A potentiometer may be used for_________________? |
| A. | measurement of resistance |
| B. | measurement of current |
| C. | calibration of ammeter |
| D. | calibration of voltmeter |
| E. | all of the above |
| Answer» F. | |
| 94. |
A phase shifting transformer is used in conjunction with_______________? |
| A. | D.C. potentiometer |
| B. | Drysdale potentiometer |
| C. | A.C. co-ordinate potentiometer |
| D. | Crompton potentiometer |
| Answer» C. A.C. co-ordinate potentiometer | |
| 95. |
A multirangq instrument has________________? |
| A. | multiple shunt or series resistances inside the meter |
| B. | multicoii arrangement |
| C. | variable turns of coil |
| D. | multi range meters inside the measurement system |
| E. | any of the above |
| Answer» B. multicoii arrangement | |
| 96. |
A moving-coil permanent-magnet instrument can be used as ____________by using a low resistance shunt? |
| A. | ammeter |
| B. | voltmeter |
| C. | flux-meter |
| D. | ballistic galvanometer |
| Answer» B. voltmeter | |
| 97. |
A moving-coil permanent-magnet instrument can be used as flux-meter_____________? |
| A. | by using a low resistance shunt |
| B. | by using a high series resistance |
| C. | by eliminating the control springs |
| D. | by making control springs of large moment of inertia |
| Answer» D. by making control springs of large moment of inertia | |
| 98. |
A dynamometer wattmeter can be used for______________? |
| A. | both D.C. and A.C. |
| B. | D.C. only |
| C. | A.C. only |
| D. | any of the above |
| Answer» B. D.C. only | |
| 99. |
A direct current can be measured by________________? |
| A. | a D.C. potentiometer directly |
| B. | a D.C. potentiometer in conjunction with a standard resistance |
| C. | a D.C. potentiometer in conjunction with a volt ratio box |
| D. | none of the above |
| Answer» C. a D.C. potentiometer in conjunction with a volt ratio box | |
| 100. |
A __________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly___________? |
| A. | deflecting |
| B. | controlling |
| C. | damping |
| D. | any of the above |
| Answer» D. any of the above | |