McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering .
| 101. |
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» A. induction instrument | |
| 102. |
Wattmeter cannot be designed on the principle of |
| A. | electrostatic instrument |
| B. | thermocouple instrument |
| C. | moving iron instrument |
| D. | electrodynamic instrument |
| Answer» C. moving iron instrument | |
| 103. |
In an energymeter braking torque is produced to |
| A. | safe guard it against creep |
| B. | brake the instrument |
| C. | bring energy meter to stand still |
| D. | maintain steady speed and equal to driving torque |
| Answer» D. maintain steady speed and equal to driving torque | |
| 104. |
Various adjustments in an energy meter include |
| A. | light load or friction |
| B. | lag and creep |
| C. | overload and voltage compensation |
| D. | all of the above |
| Answer» D. all of the above | |
| 105. |
The power of a n-phase circuit can be measured by using a minimum of |
| A. | (n - 1) wattmeter elements |
| B. | n wattmeter elements |
| C. | (n + 1) wattmeter elements |
| D. | 2n wattmeter elements |
| Answer» A. (n - 1) wattmeter elements | |
| 106. |
Two holes in the disc of energymeter are drilled at the opposite sides of the spindle to |
| A. | improve its ventilation |
| B. | eliminate creeping at no load |
| C. | increase its deflecting torque |
| D. | increase its braking tcrque |
| Answer» B. eliminate creeping at no load | |
| 107. |
Which of the following is measured by using a vector voltmeter ? |
| A. | Amplifier gain and phase shift |
| B. | Filler transfer functions |
| C. | Complex insersion loss |
| D. | All of the above |
| Answer» D. All of the above | |
| 108. |
The principle on which vector voltmeter is based is |
| A. | that it works on the principle of complex variation |
| B. | that it measures the response of linear ramp voltage |
| C. | same as digital meter |
| D. | that it measures the amplitude of a single at two points and at the same time measures their phase difference |
| Answer» D. that it measures the amplitude of a single at two points and at the same time measures their phase difference | |
| 109. |
To measure radio frequency, the suitable frequency meter is |
| A. | Weston frequency meter |
| B. | reed vibrator frequency meter |
| C. | hetrodyne frequency meter |
| D. | electrical resonance frequency meter |
| Answer» C. hetrodyne frequency meter | |
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