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Practice Test: Question Set - 08
1. A ________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly
- (A) Deflecting
- (B) Controlling
- (C) Damping
- (D) Any of the above
2. A potentiometer may be used for
- (A) Measurement of resistance
- (B) Measurement of current
- (C) Calibration of ammeter
- (D) All of the above
3. 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
4. To avoid the effect of stray magnetic field in A.C. bridges we can use
- (A) Magnetic screening
- (B) Wagner earthing device
- (C) Wave filters
- (D) Any of the above
5. Volt box is a component to
- (A) Extend voltage range
- (B) Measure voltage
- (C) Compare voltage in a box
- (D) None of the above
6. 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
7. 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
8. The pointer of an indicating instrument should be
- (A) Very light
- (B) Very heavy
- (C) Either (A) or (B)
- (D) Neither (A) nor (B)
9. A phase shifting transformer is used in conjunction with
- (A) D.C. potentiometer
- (B) Drysdale potentiometer
- (C) A.C. coordinate potentiometer
- (D) Crompton potentiometer
10. The desirable static characteristics of a measuring system are
- (A) Accuracy and reproducibility
- (B) Accuracy, sensitivity and reproducibility
- (C) Drift and dead zone
- (D) Static error
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