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Free download in PDF Electrical Measuring Instruments Multiple Choice Questions with Answers for competitive exams. These objective type questions are very important for competitive exams of Engineering. These short solved questions or quizzes are provided by Gkseries.
61
If a voltmeter is connected, like an ammeter in series to the load:
[A]
The measurement reading will be too high
[B]
Almost no current will flow in the circuit
[C]
The meter will burn
[D]
An instantaneously high current will flow
Answer: Almost no current will flow in the circuit
62
Preferred material for permanent magnet is:
[A]
Stainless steel
[B]
Alnico
[C]
Tungsten steel
[D]
Soft iron
63
PMMC instrument gives uniform scale because:
[A]
It uses spring control
[B]
It uses eddy current damping
[C]
The deflection torque is proportional to the instrument current
[D]
Both (a) and (c)
64
Maxwell-Wien bridge is used to measure:
[A]
Inductance
[B]
Capacitance
[C]
Dielectric loss
[D]
Frequency
65
____ factor is the ratio of total flux to the useful flux in a magnetic circuit:
[A]
Form factor
[B]
Leakage
[C]
Utility
[D]
Dispersion
66
For eliminating the effect of earth capacitance from the bridge network we use:
[A]
Wagner’s earthing device
[B]
High voltage at low frequency
[C]
Low voltage at high frequency
[D]
Campbell-maxwell device
Answer: Wagner’s earthing device
67
The most commonly used null deflector in a power frequency ac bridge is a:
[A]
Vibration galvanometer
[B]
D’Arsanval galvanometer
[C]
Ballistic galvanometer
[D]
Tachometer
Answer: Vibration galvanometer
68
Loss of charge method is used to measure:
[A]
Low R
[B]
High R
[C]
Low L
[D]
High L
69
Megger is an instrument used for the measurement of:
[A]
High resistance and insulation resistance
[B]
Medium resistance
[C]
Low resistance
[D]
Leakage current
Answer: High resistance and insulation resistance
70
Kelvin double bridge is best suited for the measurement of:
[A]
Inductance
[B]
Capacitance
[C]
Low resistance
[D]
High resistance
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