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Electronic Mechanic
Electronic Mechanic Set-1
AC and DC Measuring Instruments
16

AC and DC Measuring Instruments MCQ with Answers

16) Which meter movement is not affected by stray magnetic fields?

PMMC meter

Thermo couple meter

MI meter - attraction type

MI meter - Repulsion type

Answer is:

PMMC meter

AC and DC Measuring Instruments MCQ with Answers

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Related AC and DC Measuring Instruments MCQ with Answers

17) Which characteristics enable the deflection of pointer in the attraction type moving iron meter?

Weight of the soft iron pieces

Deflection is inversely proportional to current

Deflection is independent of current direction

Deflecting and controlling torques are

Answer is:

Deflection is independent of current direction

18) Which band of frequency is used for RADAR in frequency spectrum allotted by the International Telecommunication Union (ITU)?

ITU band - 4

ITU band - 6

ITU band - 8

ITU band - 10

Answer is:

ITU band - 10

19) Which control is used in repulsion type moving iron instrument to keep the pointer at zero position?

Spring control

Air damping control

Magnetic repulsion control

Magnetic attraction control

Answer is:

Spring control

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

Steel frame

Wooden frame

Ceramic frame

Aluminium frame

Answer is:

Aluminium frame

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