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ECE :: Measurements and Instrumentation

Measurements and Instrumentation - Section 1
Measurements and Instrumentation - Section 2
Measurements and Instrumentation - Section 3
Measurements and Instrumentation - Section 4
Measurements and Instrumentation - Section 5
Measurements and Instrumentation - Section 6
Measurements and Instrumentation - Section 7
Measurements and Instrumentation - Section 8
Measurements and Instrumentation - Section 9
Measurements and Instrumentation - Section 10
Measurements and Instrumentation - section-11
Measurements and Instrumentation - Section-12

  1. A single phase energy meter operates on induction principle.

    2. A.
    True
    B.
    False

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  2. The accuracy of measurement using CRO is about

    3. A.
    ± 0.5%
    B.
    ± 0.05 %
    C.
    ± 1%
    D.
    ± 3%

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  3. The channel required for FM telemetry is

    4. A.
    same as required for AM telemetry
    B.
    smaller than that required by AM telemetry
    C.
    100 times that required for AM telemetry
    D.
    10 times that required for AM telemetry

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  4. Assertion (A): Absolute instruments are used in standard laboratories.

    Reason (R): Absolute instruments do not require calibration.

    5. 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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  5. Assertion (A): A 3 phase wattmeter consists of two wattmeters mounted in one case.

    Reason (R): Power measurement in a 3 phase circuit can be conveniently done by two wattmeter method.

    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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  6. A digital voltmeter can count from 0 to 9999. If full scale reading is 9.999 V, the resolution of full scale reading is

    7. A.
    0.001
    B.
    1000
    C.
    2 digit
    D.
    1 mV

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  7. The most serious problems in ac bridge measurement is

    8. A.
    eddy currents
    B.
    leakage current
    C.
    residual magnetism
    D.
    stray fields

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  8. Assertion (A): An electrostatic voltmeter is free from hysteresis and eddy current errors.

    Reason (R): An electrostatic voltmeter has a number of fixed and moving vanes in parallel.

    9. 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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  9. The pointer of an indicating instrument should be

    10. A.
    very light
    B.
    very heavy
    C.
    neither heavy nor light
    D.
    heavy

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  10. The resistance of resistance strain gauge is about

    11. A.
    5 Ω
    B.
    50 Ω
    C.
    120 Ω
    D.
    0.5 Ω

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