Electrical And Electronic Measurement MCQs

Question 1

In CRT aquadag carries

Accepted Answer

aqueous solution of araphite

Answer

sweep voltage

Answer

secondary emission electrons

Answer

none of these

Question 2

Strain gauge LVDT and thermocouple may be classified as

Accepted Answer

analogue transducers

Answer

active transducers

Answer

primary transducers

Answer

none of these

Question 3

In a dual beam oscilloscope

Accepted Answer

there are two seperate vertical inputs and there is only one set of horizontal deflection plates

Answer

there are two seperate vertical inputs and two separate horizontal inputs

Answer

there is only one vertical input but there are two separate horizontal deflection plates

Answer

there is only one vertical and one horizontal input

Question 4

If the transients during switching of a power supply are to be studied, which of the following oscilloseope will be preferred?

Accepted Answer

Storage oscilloscope

Answer

An ordinary oscilloscope with high frequency sweep generator

Answer

Dual beam oscilloscope

Answer

Dual trace oscilloscope

Question 5

A signal of 10 mV at 75 MHz is to be measured with which of the following instruments?

Accepted Answer

Cathode ray oscilloscope

Answer

VTVM

Answer

Moving iron voltmeter

Answer

Digital multimeter

Question 6

Which voltmeter would you select for measuring 50 V direct current?

Accepted Answer

Electrostatic voltmeter

Answer

Moving coil voltmeter

Answer

Hot-wire voltmeter

Answer

Electrodynamometer

Question 7

In a piezoelectric crystal oscillator, the oscillation or tuning frequency is linearly proportional to the

Accepted Answer

inverse of the square root of the mass of the crystal

Answer

mass of the crystal

Answer

square root of the mass of the crystal

Answer

square of the mass of the crystal

Question 8

If the practical units of voltage and current wave each made 20 times as large as they are at present what would be the consequent alteration in the size of the unit of capacitance?

Accepted Answer

nil

Answer

200 times

Answer

60 times

Answer

20 times

Question 9

A thermo-couple ammeter gives full-scale deflection of bA. When it reads one fifth of the scale, the current will be

Accepted Answer

4.47 A

Answer

2A

Answer

4A

Answer

5.78 A