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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 generated voltage is equally dependent on three resistances R1, R2, R3 and its value is V = (R1R2)/R3. If tolerance of each resistor is 0.1%, the maximum error in voltage is

    2. A.
    0.3%
    B.
    ± 0.3%
    C.
    0.1%
    D.
    ± 0.1%

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  2. Assertion (A): A thermocouple transducer is based on Seeback effect.

    Reason (R): In a thermocouple transducer used for temperature measurement, the cold junction is usually kept in ice bath.

    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. In an Anderson bridge the unknown inductance is measured in terms of

    4. A.
    known inductance and resistance
    B.
    known inductance
    C.
    known capacitance and resistance
    D.
    known capacitance

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  4. In a Ballistic galvanometer

    5. A.
    inertia is small and damping is also small
    B.
    inertia is large and damping is critical
    C.
    inertia is large and damping is small
    D.
    both inertia and damping are large

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  5. Which instrument needs creep compensation?

    6. A.
    Dynamometer wattmeter
    B.
    Induction wattmeter
    C.
    Energy meter
    D.
    Both (b) and (c)

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  6. When deflecting torque and braking torque in an energy meter are zero,

    7. A.
    the disc rotates at steady speed
    B.
    the disc is stationary
    C.
    the disc accelerates
    D.
    the disc retards

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  7. The sensitivity of a voltmeter using 0-5 mA meter movement is

    8. A.
    50 Ω/V
    B.
    100 Ω/V
    C.
    200 Ω/V
    D.
    500 Ω/V

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  8. Two meters X and Y require 40 mA and 50 mA for full scale deflection. Then

    9. A.
    X is more sensitive
    B.
    Y is more sensitive
    C.
    both are equally sensitive
    D.
    it is not possible to determine from given data

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  9. A dual trace CRO has

    10. A.
    one electron gun
    B.
    two electron guns
    C.
    one electron gun with one two pole switch
    D.
    two electron guns with one two pole switch

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  10. For measuring mutual inductance we can use

    11. A.
    Anderson bridge
    B.
    Maxwell's bridge
    C.
    Heaviside bridge
    D.
    Either (a) or (b)

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