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Mechanical Engineering :: Thermodynamics

  1. The value of gas constant (R) in S. I. units is

  2. A.

    0.287 J/kgK

    B.

    2.87 J/kgK

    C.

    28.7 J/kgK

    D.

    287 J/kgK


  3. In the first law of thermodynamics, the total energy of the system remains constant.

  4. A.

    True

    B.

    False


  5. The efficiency of Diesel cycle increases with

  6. A.

    decrease in cut-off

    B.

    increase in cut-off

    C.

    constant cut-off

    D.

    none of these


  7. Coal gas is obtained by mixing coal and gas at ambient conditions.

  8. A.

    Yes

    B.

    No


  9. According to Avogadro's law, the density of any two gases is __________ their molecular masses, if the gases are at the same temperature and pressure.

  10. A.

    equal to

    B.

    directly proportional to

    C.

    inversely proportional to