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ECE :: Measurements and Instrumentation

  1. To measure moisture in wood, the most suitable method is

  2. A.
    electric conduction
    B.
    electrical-capacitive
    C.
    absorption of radiation
    D.
    equilibrium-moisture Vs humidity

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  3. An E transformer is a

  4. A.
    displacement transducer
    B.
    velocity transducer
    C.
    acceleration transducer
    D.
    pressure transducer

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  5. In which of the following instruments is the deflecting torque proportional to where L is inductance of coil and Q is deflection

  6. A.
    PMMC
    B.
    electrostatic
    C.
    moving iron
    D.
    both (a) and (b)

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  7. In a low power factor wattmeter, the resistance of pressure coil is more than in ordinary wattmeter.

  8. A.
    True
    B.
    False

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  9. The moving iron instruments are generally repulsion type.

  10. A.
    True
    B.
    False

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  11. It is required to measure pressure using LVDT. The additional device needed is

  12. A.
    strain gauge
    B.
    pitot tube
    C.
    bourden tube
    D.
    rotameter

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  13. Which of the following quantities have same dimension in emu and esu?

    1. Current
    2. Electrical power
    3. Electrical energy
    Select the answer as per following codes

  14. A.
    1 only
    B.
    1 and 2
    C.
    2 and 3
    D.
    1 and 3

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  15. In a dynamometer instrument, the moving coil is pressure coil.

  16. A.
    True
    B.
    False

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  17. Load cell uses

  18. A.
    piezoelectric crystal
    B.
    capacitor
    C.
    mutual inductance
    D.
    strain gauge

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  19. Assertion (A): A dc potentiometer measures the true open circuit emf of a source.

    Reason (R): At balance point, a dc potentiometer does not draw any current from the source.

  20. 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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