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Electronic Mechanic
Electronic Mechanic Set-1
AC and DC Measuring Instruments
20

AC and DC Measuring Instruments MCQ with Answers

20) Which frame is used for winding the coil of PMMC meter?

Steel frame

Wooden frame

Ceramic frame

Aluminium frame

Answer is:

Aluminium frame

AC and DC Measuring Instruments MCQ with Answers

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Related AC and DC Measuring Instruments MCQ with Answers

21) What is the purpose of damping torque in PMMC meter?

Control the pivot point

Control the jewel bearing

Control the magnetic field

Control the swinging of the coil

Answer is:

Control the swinging of the coil

22) Why the soft iron pieces in the moving iron meter is tongue shaped?

To generate heat

To damp the oscillations

To achieve uniformity of scale

To produce magnetic attraction

Answer is:

To achieve uniformity of scale

23) How the sensitivity of voltmeter is determined?

FSD current

Meter coil resistance

Ohms per volt rating

Maximum voltage measurement

Answer is:

Ohms per volt rating

24) What is the name of the procedure carried out to ensure the trustworthy standards of the measuring instrument?

Calibration

Range test

Re-alignment

Testing standards

Answer is:

Calibration

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