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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. Crompton potentiometer has

    2. A.
    14 coils and a slide wire all having the same resistance
    B.
    14 coils and a slide wire but the resistance of slide wire is half that of each coil
    C.
    14 coils each of different resistance
    D.
    14 coils out of which 7 coils have resistance which is twice that of remaining 7 coils

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  2. Assertion (A): For best results the system of a D'Arsonval galvanometer should be slightly under damped.

    Reason (R): Degree of damping affects the time taken by the instrument to come to final position.

    3. 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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  3. Assertion (A): An RTD uses platinum coil.

    Reason (R): Platinum is a very stable material.

    4. 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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  4. Which of the following, is not a piezoelectric material?

    5. A.
    Rochelle salt
    B.
    Quartz
    C.
    Lithium sulphate
    D.
    Sodium bicarbonate

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  5. Harmonic distortion analyser

    6. A.
    measures amplitude of each harmonic
    B.
    measures rms value of fundamental frequency component
    C.
    measures rms value of all harmonics except fundamental frequency
    D.
    displays rms value of each harmonic on screen of CRO

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  6. The scale of thermocouple instrument is linear.

    7. A.
    True
    B.
    False

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  7. Which of the following combinations is not used in thermocouple transducer measurement of temperature?

    8. A.
    Iron-constantan
    B.
    Chromel-aluminium
    C.
    Copper-constantan
    D.
    Iron-silver

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  8. The dynamic characteristics of capacitive transducer are similar to those of

    9. A.
    LP filter
    B.
    HP filter
    C.
    notch filter
    D.
    band stop filter

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  9. The electrical power to a megger is provided by

    10. A.
    battery
    B.
    inverter
    C.
    permanent magnet dc generator
    D.
    ac generator

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  10. The precision of an instrument indicates its ability to reproduce a certain reading with a given

    11. A.
    drift
    B.
    resolutions
    C.
    shift
    D.
    consistency

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