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.Management Sciences
Category: Measurement and Instrumentation
In a Weston synchronoscope, the fixed coils are connected across_______________?
A. bus-bars
B. incoming alternator
C. a lamp
D. none of the above
For handling greater currents induction wattmeters are used in conjunction with______________?
A. potential transformers
B. current transformers
C. power transformers
D. either of the above
E. none of the above
To measure radio frequency, the suitable frequency meter is_______________?
A. Weston frequency meter
B. reed vibrator frequency meter
C. heterodoxy frequency meter
D. electrical resonance frequency meter
Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?
A. Absolute instruments
B. Indicating instruments
C. Recording instruments
D. Integrating instruments
In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
A. 0°
B. 60°
C. 90°
D. 120°
An induction wattmeter can be used for_________________?
A. both D.C. and A.C.
B. D.C. only
C. A.C. only
D. any of the above
Wagner earthing device is used to eliminate errors due to________________?
A. electrostatic coupling
B. electromagnetic coupling
C. both A. and B.
D. none of the above
For measurement of mutual inductance we can use________________?
A. Anderson bridge
B. Maxwell’s bridge
C. Heaviside bridge
D. Any of the above
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