Top 150+ Solved Measurement and Instrumentation MCQ Questions Answer
Q. For measuring a very high resistance we should use
a. Kelvin's double bridge
b. Wheat stone bridge
c. Meggar
d. None of the above
Q. The electrical power to a meggar is provided by
a. battery
b. permanent magnet D.C. generator
c. AC. generator
d. any of the above
Q. Murray loop test can be used for location of
a. ground fault on a cable
b. short circuit fault on a cable
c. both the ground fault and the short-circuit fault
d. none of the above
Q. Which of the following devices should be used for accurate measurement of low D.C.voltage ?
a. Small range moving coil voltmeter
b. D.C. potentiometer
c. Small range thermocouple voltmeter
d. None of the above
Q. It is required to measure the true open circuit e.m.f. of a battery. The best device is
a. D.C. voltmeter
b. Ammeter and a known resistance
c. D.C. potentiometer
d. None of the above
Q. A voltage of about 200 V can be measured
a. directly by a D.C. potentiometer
b. a D.C. potentiometer in conjunction with a volt ratio box
c. a D.C. potentiometer in conjunction with a known resistance
d. none of the above
Q. A direct current can be measured by
a. a D.C. potentiometer directly
b. a D.C. potentiometer in conjunction with a standard resistance
c. a D.C. potentiometer in conjunction with a volt ratio box
d. none of the above
Q. To measure a resistance with the help of a potentiometer it is
a. necessary to standardise the potentiometer
b. not necessary to standardise the potentiometer
c. necessary to use a volt ratio box in conjunction with the potentiometer
d. none of the above
Q. A phase shifting transformer is used in conjunction with
a. D.C. potentiometer
b. Drysdale potentiometer
c. A.C. co-ordinate potentiometer
d. Crompton potentiometer
Q. Basically a potentiometer is a device for
a. comparing two voltages
b. measuring a current
c. comparing two currents
d. measuring a voltage
Q. In order to achieve high accuracy, the slide wire of a potentiometer should be
a. as long as possible
b. as short as possible
c. neither too small not too large
d. very thick
Q. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supplyfor the potentiometer in taken
a. from a source which is not the same as the unknown voltage
b. from a battery
c. from the same source as the unknown voltage
d. any of the above
Q. The stator of phase shifting transformer for use in conjunction with an A.C. potentiometerusually has a
a. single-phase winding
b. two-phase winding
c. three-phase winding
d. any of the above