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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