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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. The Y plates of a CRO are excited by a voltage 2 sin 100 t and the X plates are not connected. The display would be

    2. A.
    a vertical line
    B.
    a horizontal line
    C.
    sine wave
    D.
    slant line

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  2. Heating effect of current is used in

    3. A.
    ammeters
    B.
    voltmeters
    C.
    both ammeters and voltmeters
    D.
    wattmeters

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  3. The coils of Drysdale polar potentiometer are wound non-inductively.

    4. A.
    True
    B.
    False

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  4. In figure the output V0 is

    5. A.
    2V1 + V2 - 2V3
    B.
    2(V1 + V2) - V3
    C.
    V1 + V2 + V3
    D.
    V1 + 2V2 - V3

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  5. Magnetic effect of current is used in

    6. A.
    ammeters
    B.
    voltmeters
    C.
    wattmeters
    D.
    ammeters, voltmeters, wattmeters and energy meters

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  6. Which of these instruments is dynamometers type?

    7. A.
    Wattmeter
    B.
    Power factor meter
    C.
    Frequency meter
    D.
    Both (a) and (b)

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  7. The instrument used to check insulation of household wiring is

    8. A.
    megger
    B.
    ohmmeter
    C.
    multimeter
    D.
    high resistance voltmeter

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  8. Watthour meter is an integrating instrument

    9. A.
    True
    B.
    False

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  9. An ammeter is

    10. A.
    secondary instrument
    B.
    absolute instrument
    C.
    recording instrument
    D.
    integrating instrument

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  10. It is required to measure temperature in the range of 1300-1520°C. The most suitable thermocouple is

    11. A.
    chromel constantan
    B.
    iron constantan
    C.
    chromel aluminium
    D.
    platinum-rhodium

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