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


b A braking device


cRevolution registering device


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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