BEE Measurement and Instrumentation 2

Question 1

Which bridge circuit is most commonly used to measure inductance?

Accepted Answer

Maxwell bridge

Answer

The Maxwell bridge balances inductance against a known capacitance and resistance to measure unknown inductance values.

Question 2

A current transformer (CT) should never be operated with its secondary:

Accepted Answer

Open-circuited

Answer

An open-circuited CT secondary causes dangerously high voltages due to the high magnetizing current in the primary.

Question 3

The sensitivity of a voltmeter is expressed in:

Accepted Answer

Ohms per volt

Answer

Voltmeter sensitivity (Ω/V) indicates how much resistance the meter presents per volt of full-scale deflection; higher is better.

Question 4

In a CRO, the time base is generated by:

Accepted Answer

A sawtooth wave generator

Answer

The sawtooth (ramp) wave sweeps the electron beam linearly across the screen at a controlled rate to create the time axis.

Question 5

Which error results from the loading effect of a voltmeter on a circuit?

Accepted Answer

Systematic error

Answer

Loading error is a systematic error because it consistently affects every measurement in the same direction due to the meter's finite input impedance.

BEE - Bachelor of Electrical Engineering Practice Test

BEE - Bachelor of Electrical Engineering Practice Test

BEE Measurement and Instrumentation 2