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ECE :: Measurements and Instrumentation

  1. Which of these instruments has highest power consumption?

  2. A.
    Dynamometer
    B.
    Electrostatic
    C.
    Moving coil
    D.
    Hot wire

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  3. If A = 629 ± 8 and B = 131 ± 3, A - B with range of doubt is

  4. A.
    498 ± 8
    B.
    498 ± 4
    C.
    498 ± 11
    D.
    498 ± 13

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  5. Assertion (A): If the reading of an instrument is low, the error is large.

    Reason (R): The error of an instrument is certain percentage of its full scale deflection.

  6. A.
    Both A and R are true and R is correct explanation of A
    B.
    Both A and R are true but R is not correct explanation of A
    C.
    A is true R is false
    D.
    A is false R is true

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  7. A thermocouple instrument can be used over a very wide frequency range.

  8. A.
    True
    B.
    False

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  9. A vibration galvanometer is a

  10. A.
    moving coil instrument
    B.
    moving iron instrument
    C.
    dynamometer instrument
    D.
    induction instrument

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  11. In a phase shifting transformer the currents in the two stator winding are in phase.

  12. A.
    True
    B.
    False

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  13. A power factor meter has

  14. A.
    one current and one pressure circuit
    B.
    one current circuit and two pressure circuits
    C.
    two current circuits and two pressure circuits
    D.
    two current circuits and one pressure circuit

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  15. In a semiconductor strain gauge, the ohmic electrical contacts are generally made of

  16. A.
    copper wire
    B.
    gold wire
    C.
    aluminium wire
    D.
    nickel wire

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  17. To measure dielectric loss you would use

  18. A.
    Anderson bridge
    B.
    Kelvin bridge
    C.
    Schering bridge
    D.
    Maxwell's bridge

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  19. Minute cracks in metals and minute faults in welded joints can be detected using

  20. A.
    IR rays
    B.
    UV rays
    C.
    a rays
    D.
    X-ray/γ-rays

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