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.Management Sciences
Category: Measurement and Instrumentation
Instrument transformers are_______________?
A. potential transformers
B. current transformers
C. both A. and B.
D. power transformers
is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another_______________?
A. Tangent galvanometer
B. Meggar
C. Current transformer
D. None of the above
The multiplier and the meter coil in a voltmeter are in________________?
A. series
B. parallel
C. series-parallel
D. none of the above
Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to_____________?
A. improve its ventilation
B. eliminate creeping at no load
C. increase its deflecting torque
D. increase its braking torque
The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?
A. load impedance is high
B. load impedance is low
C. supply voltage is low
D. none of the above
The ratio of maximum displacement deviation to full scale deviation of the instrument is called_______________?
A. static sensitivity
B. dynamic deviation
C. linearity
D. precision or accuracy
The chemical effect of current is used in ______________?
A. D.C. ammeter hour meter
B. D.C. ammeter
C. D.C. energy meter
D. none of the above
For measurement of inductance having high value, we should use______________?
A. Maxwell’s bridge
B. Maxwell Wein bridge
C. Hay’s bridge
D. Any of the above
A Weston frequency meter is_____________?
A. moving coil instrument
B. moving iron instrument
C. dynamometer instrument
D. none of the above
Commonly used instruments in power system measurement are_______________?
A. induction
B. moving coil or iron
C. rectifier
D. electrostatic
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