Electrical And Electronic Measurement MCQs

Question 1

Instrument accuracy is defined as

Accepted Answer

closeness with which an instrument reading approaches the true value of the quantity being measured

Answer

the measure of consistancey or reproduci-bility of the measurements

Answer

the smallest measurable input change

Answer

the ratio of the change in output signal to the change in the input signal

Question 2

Resolution of a measuring instrument is defined as

Accepted Answer

the smallest measurable input change

Answer

consistency or the reproducibility of the measurement

Answer

ability to reproduce the output in the same from as the input

Answer

ratio of the change of output signal to change in the input signal

Question 3

Reproducibility measurement of an instrument gives an indication of

Accepted Answer

precision

Answer

resolution

Answer

reliability

Answer

accuracy

Question 4

Which of the following instruments is free from hysteresis and eddy current losses?

Accepted Answer

Electrostatic instrument

Answer

M.I. instrument

Answer

Electrodynamometer type instrument

Answer

All of these

Question 5

Function of the zero-adjust control in a multimeter is to

Accepted Answer

to correct the zero point

Answer

conduct the current

Answer

change the sensitivity of the meter

Answer

to tighten up the moving parts to the casing

Question 6

The common method of measuring 3-phase balanced or unbalanced power is

Accepted Answer

two wattmeter method

Answer

one wattmeter method

Answer

three wattmeter method

Answer

none of these

Question 7

In an energy meter, steady speed of the disc is achieved when

Accepted Answer

braking torque is equal to the operating torque

Answer

braking torque is le ss than the operating torque

Answer

braking torque is twice the operating torque

Answer

braking torque is more than the operating torque

Question 8

The most common method for measurement of low resistance is

Accepted Answer

Kelvin's double bridge method

Answer

Wheatstone bridge method

Answer

potentiometer method

Answer

voltmeter-ammeter method

Question 9

For measurement of very high resistance (insulation resistance), the instrument used is

Accepted Answer

Meggar

Answer

multimeter

Answer

potentiometer

Answer

Wheatstone bridge