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.Management Sciences
Category: Measurement and Instrumentation
To measure a resistance with the help of a potentiometer it is_________________?
A. necessary to standardise the potentiometer
B. not necessary to standardise the potentiometer
C. necessary to use a volt ratio box in conjunction with the potentiometer
D. none of the above
Alternating current is measured by_______________?
A. induction ammeter
B. permanent magnet type ammeter
C. electrostatic ammeter
D. moving iron repulsion type voltmeter
The power factor of a single phase load can be calculated if the instruments available are_____________?
A. one voltmeter and one ammeter
B. one voltmeter, one ammeter and one wattmeter
C. one voltmeter, one ammeter and one energy meter
D. any of the above
Which of the following are integrating instruments ?
A. Ammeters
B. Voltmeters
C. Wattmeters
D. Ampere-hour and watt-hour meters
Damping of the Ballistic galvanometer is made small to_______________?
A. get first deflection large
B. make the system oscillatory
C. make the system critically damped
D. get minimum overshoot
In a Schering bridge the potential of the detector above earth potential is______________?
A. a few volts only
B. 1 kV
C. 5 kV
D. 10 kV
A phase shifting transformer is used in conjunction with_______________?
A. D.C. potentiometer
B. Drysdale potentiometer
C. A.C. co-ordinate potentiometer
D. Crompton potentiometer
If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is_________________?
A. 10°
B. 80°
C. 120°
D. 170°
Which of the following essential features is possessed by an indicating instrument ?
A. Deflecting device
B. Controlling device
C. Damping device
D. All of the above
Operating torques in analogue instruments are_______________?
A. deflecting and control
B. deflecting and damping
C. deflecting, control and damping
D. vibration and balancing
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