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Mechanical Engineering :: Thermodynamics

  1. Boyle's law states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

  2. A.

    Agree

    B.

    Disagree


  3. The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is always __________ one.

  4. A.

    equal to

    B.

    less than

    C.

    greater than


  5. The isothermal and adiabatic processes are regarded as

  6. A.

    reversible process

    B.

    irreversible process

    C.

    reversible or irreversible process

    D.

    none of these


  7. The variables which control the physical properties of a perfect gas are

  8. A.

    pressure exerted by the gas

    B.

    volume occupied by the gas

    C.

    temperature of the gas

    D.

    all of these


  9. The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by

  10. A.

    Kelvin

    B.

    Joule

    C.

    Clausis

    D.

    Gay-Lussac