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Chemical Engineering :: Process Control and Instrumentation

Process Control and Instrumentation - Section 1
Process Control and Instrumentation - Section 2
Process Control and Instrumentation - Section 3
Process Control and Instrumentation - Section 4
Process Control and Instrumentation - Section 5
Process Control and Instrumentation - Section 6
Process Control and Instrumentation - Section 7

  1. The inverse Laplace transform of the function is

    2. A.
    1 + et
    B.
    1 - et
    C.
    1 + e-t
    D.
    1 - e-t

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  2. Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity ?

    3. A.
    CO2
    B.
    N2
    C.
    O2
    D.
    CO

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  3. Emf generated in a thermocouple depends on the temperature

    4. A.
    of cold junction only.
    B.
    of hot junction only.
    C.
    difference between hot and cold junctions.
    D.
    difference between cold junction and atmospheric temperature.

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  4. Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

    5. A.
    increase of pressure
    B.
    increase of thermal conductivity
    C.
    volumetric expansion
    D.
    differential linear expansion

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  5. The Laplace transform of a sinusoidal function (eg; sin at) is represented by the curve

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  6. Number of poles in a system with transfer function is

    7. A.
    2
    B.
    5
    C.
    3
    D.
    1

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  7. Radiation thermometer can not measure the temperature

    8. A.
    inside a pressure vessel.
    B.
    of an object without coming in contact with it.
    C.
    of liquid oxygen.
    D.
    of moving objects at high temperature.

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  8. Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.

    9. A.
    antimony
    B.
    gold
    C.
    silver
    D.
    nickel

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  9. Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?

    10. A.
    CO2
    B.
    O2
    C.
    NO
    D.
    NO2

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  10. Dilatometer is used to measure

    11. A.
    stress
    B.
    strain
    C.
    deflection
    D.
    contraction/expansion due to changes in temperature

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