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Mechanical Engineering :: Thermodynamics

  1. Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to

  2. A.

     T

    B.

     J

    C.

     J²

    D.

     Vr


  3. A cycle consisting of __________ and two isothermal processes is known as Stirling cycle.

  4. A.

     Two constant pressure

    B.

     Two constant volume

    C.

     Two isentropic

    D.

     One constant pressure, one constant volume


  5. A cycle consisting of _________ and two isothermal processes is known as Stirling cycle.

  6. A.

     Two isentropic

    B.

     One constant pressure, one constant volume

    C.

     Two constant volumes

    D.

     Two constant pressures


  7. The behavior of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

  8. A.

     Boyle's law

    B.

     Gay-Lussac law

    C.

     Charles' law

    D.

     All of these


  9. The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

  10. A.

     Ru × T

    B.

     1.5 Ru × T

    C.

     2 Ru × T

    D.

     3 Ru × T


  11. The general law for the expansion or compression of gases, is

  12. A.

     pv = C

    B.

     pv = m R T

    C.

     pvn = C

    D.

     pvγ = C


  13. In an isothermal process

  14. A.

     There is no change in enthalpy

    B.

     There is no change in internal energy

    C.

     There is no change in temperature

    D.

     All of these


  15. The hyperbolic process is governed by

  16. A.

     Avogadro's law

    B.

     Boyle's law

    C.

     Charles' law

    D.

     Gay-Lussac law


  17. An isothermal process is governed by

  18. A.

     Gay-Lussac law

    B.

     Charles' law

    C.

     Boyle's law

    D.

     Avogadro's law


  19. When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as

  20. A.

     Thermodynamic law

    B.

     Thermodynamic process

    C.

     Thermodynamic cycle

    D.

     None of these