Electrical Engineering MCQs

Page No. 69

To measure a resistance with the help of a potentiometer it is_________________?


anecessary to standardise the potentiometer

✖


bnot necessary to standardise the potentiometer

✓


cnecessary to use a volt ratio box in conjunction with the potentiometer

✖


d none of the above

✖



The electrical power to a meggar is provided by________________?


abattery

✖


bpermanent magnet D.C. generator

✓


cAC. generator

✖


dany of the above

✖



It is required to measure the true open circuit e.m.f. of a battery. The best device is_____________?


aD.C. voltmeter

✖


b Ammeter and a known resistance

✖


c D.C. potentiometer

✓


d None of the above

✖


View Answer D.C. potentiometer

An ohmmeter is a____________?


a moving iron instrument

✖


b moving coil instrument

✓


cdynamometer instrument

✖


dnone of the above

✖



Murray loop test can be used for location of________________?


aground fault on a cable

✖


bshort circuit fault on a cable

✖


cboth the ground fault and the short-circuit fault

✓


d none of the above

✖



In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?


aunity

✓


b0.8 lagging

✖


c0.8 leading

✖


dzero

✖


View Answer unity

Which of the following is an essential part of a motor meter ?


aAn operating torque system

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b A braking device

✖


cRevolution registering device

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d All of the above

✓


View Answer All of the above

The household energy meter is_______________?


aan indicating instrument

✖


b a recording instrument

✖


can integrating instrument

✓


dnone of the above

✖



An ammeter is a______________?


asecondary instrument

✓


babsolute instrument

✖


c recording instrument

✖


d integrating instrument

✖


View Answer secondary instrument

The switch board instruments________________?


ashould be mounted in vertical position

✓


bshould be mounted in horizontal position

✖


c either A. or B.

✖


d neither A. nor B.

✖



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