Electrical Measurement and Instrumentation MCQ

Electrical measurement and instrumentation refers to the use of instruments (such as voltmeters, ammeters, oscilloscope) for measuring electrical units and quantities such as voltage, current, and, resistance.

A voltmeter connects in

A voltmeter connects in:

  1. Series
  2. Parallel
  3. Both of these
  4. Any of above

Correct answer: 2. Parallel


The ammeter connects in

The ammeter connects in:

  1. Series
  2. Parallel
  3. Both of these
  4. Any of above

Correct answer: 1. Series


The loading effect of voltmeter is reduced using

The loading effect of voltmeter is reduced using:

  1. Low internal resistance
  2. Medium internal resistance
  3. High internal resistance
  4. None of these

Correct answer: 3. High internal resistance


Ammeter loading effects are reduced using

Ammeter loading effects are reduced using:

  1. Low internal resistance
  2. Medium internal resistance
  3. High internal resistance
  4. None of these

Correct answer: 1. Low internal resistance


The psophometer is used to measure

The psophometer is used to measure:

  1. AF signal level
  2. Speed of motors
  3. Q factor of circuits
  4. Frequency spectrum

Correct answer: 1. AF signal level

The pointer of an indicating instrument should be made of

The pointer of an indicating instrument should be made of:

  1. Copper
  2. Aluminum
  3. Silver
  4. Steel

Correct answer: 2. Aluminum

Aluminum is light and it doesn’t increase the weight of the moving system, therefore the pointer of indicating instruments should be made of aluminum

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