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.Management Sciences
Category: Measurement and Instrumentation
Which of the following is an essential part of a motor meter ?
0
A. An operating torque system
B. A braking device
C. Revolution registering device
D. All of the above
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of___________?
A. 0.1 Hz
B. 0.25 Hz
C. 0.5 Hz
D. 1.5 Hz
The switch board instruments________________?
A. should be mounted in vertical position
B. should be mounted in horizontal position
C. either A. or B.
D. neither A. nor B.
In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________?
A. exactly 0°
B. approximately 0°
C. exactly 90°
D. approximately 90°
In an Anderson bridge, the unknown inductance is measured in terms of_______________?
A. known inductance and resistance
B. known capacitance and resistance
C. known resistance
D. known inductance
In majority of instruments damping is provided by______________?
A. fluid friction
B. spring
C. eddy currents
D. all of the above
In a Weston synchronoscope, the fixed coils are connected across_______________?
A. bus-bars
B. incoming alternator
C. a lamp
D. none of the above
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