Home / Chemical Engineering / Chemical Engineering Thermodynamics :: Section 5

Chemical Engineering :: Chemical Engineering Thermodynamics

  1. The heat capacities for the ideal gas state depend upon the

  2. A.
    pressure
    B.
    temperature
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Which of the following will increase the volume of a real gas by four times ?

  4. A.
    Doubling the absolute temperature as well as pressure of the gas.
    B.
    Reducing pressure to one fourth at constant temperature.
    C.
    Reducing temperature to one fourth at constant pressure.
    D.
    Reducing the temperature to half and doubling the pressure.

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. Pick out the wrong statement.

  6. A.
    A refriferation cycle violates the second law of thermadynamics.
    B.
    Refrigeration cycle is normally represented by a temperature vs. entropy plot.
    C.
    In a refrigerator, work required decreases as the temperature of the refrigerator and the temperature at which heat is rejected increases.
    D.
    One ton of refrigeration is equivalent to the rate of heat absorption equal to 3.53 kW.

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. The equation, PV = nRT, is best obeyed by gases at

  8. A.
    low pressure & high temperature.
    B.
    high pressure & low temperature.
    C.
    low pressure & low temperature.
    D.
    none of these.

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. Which of the following liquid metals has the highest thermal conductivity ?

  10. A.
    Molten sodium
    B.
    Molten lead
    C.
    Mercury
    D.
    Molten potassium

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Which of the following has the least thermal efficiency ?

  12. A.
    Steam engine
    B.
    Carnot engine
    C.
    Diesel engine
    D.
    Otto engine

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the

  14. A.
    process must be isobaric.
    B.
    temperature must decrease.
    C.
    process must be adiabatic.
    D.
    both (b) and (c).

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Pick out the wrong statement.

  16. A.
    The values of are zero for a real gas at its critical point.
    B.
    Heat transferred is equal to the change in the enthalpy of the system, for a constant pressure, non-flow, mechanically reversible process.
    C.
    Thermal efficiency of a Carnot engine depends upon the properties of the working fluid besides the source & sink temperatures.
    D.
    During a reversible adiabatic process, the entropy of a substance remains constant.

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as

  18. A.
    P + F - C = 2
    B.
    C = P - F + 2
    C.
    F = C - P - 2
    D.
    P = F - C - 2

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. The value of Cp & Cv respectively for monoatomic gases in Kcal/kg Mole . °K are

  20. A.
    5 & 3
    B.
    3.987 & 1.987
    C.
    1.987 & 0.66
    D.
    0.66 & 1.987

    View Answer

    Workspace

    Discuss Discuss in Forum