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.Management Sciences
Category: Measurement and Instrumentation
The gravity controlled instrument has crowded scale because current is proportional to________________?
A. balancing weight
B. deflection angle
C. sine of deflection angle
Which of the following devices may be used for extending the range of instruments ?
A. Shunts
B. Multipliers
C. Current transformers
D. Potential transformers
E. All of the above
The two pressure coils of a single phase power factor meter have_________________?
A. the same dimensions and the same number of turns
B. the same dimension but different number of turns
C. the same number of turns but different dimensions
D. none of the above
Most common form of A.C. meters met with in every day domestic and industrial installations are______________?
A. mercury motor meters
B. commutator motor meters
C. induction type single phase energy meters
D. all of the above
In Weston synchronoscope the moving coil is connected across______________?
A. bus-bars
B. incoming alternator
C. fixed coils
D. any of the above
In a portable instrument, the controlling torque is provided by_____________?
A. spring
B. gravity
C. eddy currents
D. all of the above
The electrical power to a meggar is provided by________________?
A. battery
B. permanent magnet D.C. generator
C. AC. generator
D. any of the above
In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?
A. unity
B. 0.8 lagging
C. 0.8 leading
D. zero
Which of the following is measured by using a vector voltmeter ?
A. Amplifier gain and phase shift
B. Filler transfer functions
C. Complex insersion loss
D. All of the above
An instrument transformer is used to extend the range of______________?
A. induction instrument
B. electrostatic instrument
C. moving coil instrument
D. any of the above
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