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Practice Test: Question Set - 01

1. The spring material used in a spring control device should have the following property.
    (A) Should be nonmagnetic
    (B) Most be of low temperature coefficient
    (C) Should have low specific resistance
    (D) All of the above

2. For handling greater currents induction watt-meters are used in conjunction with
    (A) Potential transformers
    (B) Current transformers
    (C) Power transformers
    (D) Either of the above

3. The chemical effect of current is used in
    (A) D.C. ammeter hour meter
    (B) D.C. ammeter
    (C) D.C. energy meter
    (D) None of the above

4. The multiplier and the meter coil in a voltmeter are in
    (A) Series
    (B) Parallel
    (C) Series-parallel
    (D) None of the above

5. The pressure coil of a wattmeter should be connected on the supply side of the current coil when
    (A) Load impedance is high
    (B) Load impedance is low
    (C) Supply voltage is low
    (D) None of the above

6. When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is
    (A) Short-circuited
    (B) All right
    (C) Faulty
    (D) None of the above

7. Which of the following devices should be used for accurate measurement of low D.C. voltage?
    (A) Small range moving coil voltmeter
    (B) D.C. potentiometer
    (C) Small range thermocouple voltmeter
    (D) None of the above

8. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken
    (A) From a source which is not the same as the unknown voltage
    (B) From a battery
    (C) From the same source as the unknown voltage
    (D) Any of the above

9. 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

10. The two pressure coils of a single phase power factor meter have
    (A) The same dimensions and the same number of turns
    (B) The same dimension but different number of turns
    (C) The same number of turns but different dimensions
    (D) None of the above

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