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Mechanical Engineering :: Thermodynamics

  1. The processes occuring in open system which permit the transfer of mass to and from the system, are known as

  2. A.

    flow processes

    B.

    non-flow processes

    C.

    adiabatic processes

    D.

    none of these


  3. Which of the following has the minimum atomic mass?

  4. A.

    Oxygen

    B.

    Sulphur

    C.

    Nitrogen

    D.

    Carbon


  5. Workdone in a free expansion process is

  6. A.

    zero

    B.

    minimum

    C.

    maximum

    D.

    positive


  7. The pressure exerted by an ideal gas is __________ of the kinetic energy of all the molecules contained in a unit volume of gas.

  8. A.

    one-half

    B.

    one-third

    C.

    two-third

    D.

    three-fourth


  9. The compression ratio for petrol engines is

  10. A.

    3 to 6

    B.

    5 to 8

    C.

    15 to 20

    D.

    20 to 30