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Chemical Engineering :: Process Control and Instrumentation

  1. When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is

  2. A.
    same in both the phases.
    B.
    zero in both the phases.
    C.
    more in vapour phase.
    D.
    more in liquid phase.

  3. COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about

  4. A.
    0.5
    B.
    3.5
    C.
    4.5
    D.
    8.5

  5. On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will

  6. A.
    increase
    B.
    decrease
    C.
    remain same
    D.
    increase in summer and will decrease in winter

  7. Domestic refrigerator usually works on the __________ refrigeration cycle.

  8. A.
    Carnot
    B.
    air
    C.
    absorption
    D.
    vapour-ejection

  9. Gibbs-Duhem equation

  10. A.
    states that n1dμ1 + n2dμ2 + ....njdμj = 0, for a system of definite composition at constant temperature and pressure.
    B.
    applies only to binary systems.
    C.
    finds no application in gas-liquid equilibria involved in distillation.
    D.
    none of these

  11. Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is

  12. A.
    1
    B.
    4
    C.
    2
    D.
    3

  13. The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant Cv), depends upon its

  14. A.
    pressure
    B.
    volume
    C.
    temperature
    D.
    all (a), (b) & (c).

  15. "When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs". This phenomenon is related to the

  16. A.
    Gibbs-Duhem equation
    B.
    Gibbs-Helmholtz equation
    C.
    Third law of thermodynamics
    D.
    Joule-Thomson effect

  17. The internal energy of an ideal gas does not change in a reversible __________ process.

  18. A.
    isothermal
    B.
    adiabatic
    C.
    isobaric
    D.
    isometric

  19. A/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.

  20. A.
    isolated
    B.
    closed
    C.
    open
    D.
    none of these