Menu
Home / Chemical Engineering / Process Control and Instrumentation :: Section 2

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. Pick out the wrong statement

    2. A.
    Proportional controller is normally used for level control in industrial applications.
    B.
    CSTR can be considered as a distributed parameter system.
    C.
    Distributed parameter approach gives partial differential equation.
    D.
    Non-linear behaviour is exemplified by an on-off controller.

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. Range of hydrogen gas constant volume themometer is __________ °C.

    3. A.
    -10 to 20
    B.
    0 to 100
    C.
    100 - 500
    D.
    400 - 1000

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. The __________ of a vapor pressure thermometer is a primary element.

    4. A.
    pointer
    B.
    Bourdon tube
    C.
    bulb
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. The time constant of a first order process with resistance R and capacitance C is

    5. A.
    R + C
    B.
    R - C
    C.
    RC
    D.
    1/RC

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. A sinusoidal variation in the input passing through a linear first order system

    6. A.
    becomes more oscillatory (frequency increases).
    B.
    becomes less oscillatory (frequency decreases).
    C.
    gets amplified (magnitude increases).
    D.
    gets attenuated (magnitude decreases).

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.

    7. A.
    0-100
    B.
    < 0
    C.
    > 100.
    D.
    > 50

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. What is the overall transfer function (C/R) of the following block diagram if G = G1. G2. G3 and H = H1.H2.

    8. View Answer

    Workspace

    Discuss Discuss in Forum

  8. Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.

    9. A.
    mercury thermometer
    B.
    bimetallic thermometer
    C.
    radiation pyrometer
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. Accurate temperature measurement performance of a radiation pyrometer can not be affected, if the

    10. A.
    enhancement or attentuation of redia-tion occurs in the sighting path.
    B.
    object and surrounding are at almost the same temperature.
    C.
    object has varying emissivity.
    D.
    object is transparent.

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

    11. A.
    Peltier
    B.
    Thomson
    C.
    Seebeck
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers