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Study MCQ
Electronics Mechanic
AC AND DC MEASURING INSTRUMENTS
Set 5
Set 5
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Q4138
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What is the purpose of damping torque in PMMC meter?
A
Control the pivot point
B
Control the jewel bearing
C
Control the magnetic field
D
Control the swinging of the coil
Q4139
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Why the soft iron pieces in the moving iron meter is tongue shaped?
A
To generate heat
B
To damp the oscillations
C
To achieve uniformity of scale
D
To produce magnetic attraction
Q4140
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How the sensitivity of voltmeter is determined?
A
FSD current
B
Meter coil resistance
C
Ohms per volt rating
D
Maximum voltage measurement
Q4141
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What is the name of the procedure carried out to ensure the trustworthy standards of the measuring instrument?
A
Calibration
B
Range test
C
Re-alignment
D
Testing standards
Q4142
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How the accuracy of amplitude and frequency measured by CRO is checked?
A
By sine wave signal
B
By function generator
C
By complex wave form
D
By built-in calibration signal
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