Electrical Measurements and Measuring Instruments Objective Questions - Set 08 - ObjectiveBooks

Electrical Measurements and Measuring Instruments Objective Questions - Set 08

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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