Electrical Engineering MCQs

Page No. 67

The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a _________________?


asingle-phase winding


btwo-phase winding


cthree-phase winding


dany of the above


View Answer two-phase winding

Basically a potentiometer is a device for________________?


acomparing two voltages


bmeasuring a current


ccomparing two currents


dmeasuring a voltage



A voltage of about 200 V can be measured__________________?


adirectly by a D.C. potentiometer


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


ca D.C. potentiometer in conjunction with a known resistance


dnone of the above



In a meggar controlling torque is provided by______________?


aspring


bgravity


ccoil


deddy current


View Answer coil

In a low power factor wattmeter the pressure coil is connected_______________?


ato the supply side of the current coil


bto the load side of the current coil


cin any of the two meters at connection


d none of the above



The scale of a rectifier instrument is_________________?


alinear


bnon-linear


ceither A. or B.


dneither A. nor B.


View Answer linear

The resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?


aalmost zero


b low


chigh


d none of the above


View Answer high

In a low power factor wattmeter the compensating coil is connected_______________?


ain series with current coil


bin parallel with current coil


c in series with pressure coil


d in parallel with pressure coil



An induction wattmeter can be used for_________________?


a both D.C. and A.C.


bD.C. only


cA.C. only


d any of the above


View Answer D.C. only

A dynamometer wattmeter can be used for______________?


aboth D.C. and A.C.


bD.C. only


cA.C. only


dany of the above


View Answer both D.C. and A.C.

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