Electrical Engineering MCQs

Page No. 68

The multiplier and the meter coil in a voltmeter are in________________?


aseries


b parallel


c series-parallel


dnone of the above


View Answer series

For measuring current at high frequency we should use_______________?


amoving iron instrument


belectrostatic instrument


c thermocouple instrument


dnone of the above



The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?


a load impedance is high


bload impedance is low


csupply voltage is low


d none of the above



The adjustment of position of shading bands, in an energy meter is done to provide______________?


afriction compensation


bcreep compensation


cbraking torque


dnone of the above


View Answer friction compensation

For measuring a very high resistance we should use_______________?


a Kelvin’s double bridge


bWheat stone bridge


c Meggar


dNone of the above


View Answer Meggar

The operating voltage of a meggar is about_______________?


a6 V


b12 V


c40 V


d 100 V


View Answer 100 V

When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is____________?


ashort-circuited


ball right


c faulty


dNone of them


View Answer all right

In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?


a as long as possible


bas short as possible


cneither too small not too large


d very thick



A direct current can be measured by________________?


aa D.C. potentiometer directly


ba D.C. potentiometer in conjunction with a standard resistance


ca D.C. potentiometer in conjunction with a volt ratio box


dnone of the above



Which of the following devices should be used for accurate measurement of low D.C. voltage ?


aSmall range moving coil voltmeter


bD.C. potentiometer


cSmall range thermocouple voltmeter


dNone of the above


View Answer D.C. potentiometer

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