Home / Mechanical Engineering / Thermodynamics :: section-8

Mechanical Engineering :: Thermodynamics

  1. The first law of thermodynamics is the law of

  2. A.

     Conservation of mass

    B.

     Conservation of energy

    C.

     Conservation of momentum

    D.

     Conservation of heat


  3. Stirling and Ericsson cycles are

  4. A.

     Quasi-static cycles

    B.

     Reversible cycles

    C.

     Semi-reversible cycles

    D.

     Irreversible cycles


  5. The behavior of super-heated vapour is similar to that of

  6. A.

     Perfect gas

    B.

     Air

    C.

     Steam

    D.

     Ordinary gas


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

  8. A.

     Sulphur

    B.

     Nitrogen

    C.

     Oxygen

    D.

     Carbon


  9. The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is

  10. A.

     29.27 kgfm/mol °K

    B.

     8314 kgfm/mol °K

    C.

     848 kgfm/mol °K

    D.

     427 kgfm/mol °K


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

  12. A.

     0.287 J/kgK

    B.

     2.87 J/kgK

    C.

     28.7 J/kgK

    D.

     287 J/kgK


  13. In an ideal gas turbine plant, it is assumed that the compression and expansion processes are

  14. A.

     Isothermal

    B.

     Isentropic

    C.

     Polytropic

    D.

     None of these


  15. The hard coke is obtained when carbonization of coal is carried out at

  16. A.

     500° to 700°C

    B.

     700° to 900°C

    C.

     300° to 500°C

    D.

     900° to 1100°C


  17. The unit of energy is S. I. units is

  18. A.

     Joule (J)

    B.

     Joule meter (Jm)

    C.

     Watt (W)

    D.

     Joule/meter (J/m)


  19. The universal gas constant (or molar constant) of a gas is the product of

  20. A.

     Molecular mass of the gas and the gas constant

    B.

     Atomic mass of the gas and the gas constant

    C.

     Molecular mass of the gas and the specific heat at constant pressure

    D.

     Molecular mass of the gas and the specific heat at constant volume