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Mechanical Engineering :: Thermodynamics

  1. When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

  2. A.

     Zeroth law of thermodynamics

    B.

     First law of thermodynamics

    C.

     Second law of thermodynamics

    D.

     Kelvin Planck's law


  3. All perfect gases change in volume by 1/273th of its original volume at 0°C for every 1°C change in temperature, when the pressure remains constant. This statement is called

  4. A.

     Boyle's law

    B.

     Charles' law

    C.

     Gay-Lussac law

    D.

     Joule's law


  5. Which of the following statement is wrong?

  6. A.

     The closed cycle gas turbine plants are external combustion plants.

    B.

     In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.

    C.

     The advantage of efficient internal combustion is eliminated as the closed cycle has an external surface.

    D.

     In open cycle gas turbine, atmosphere acts as a sink and no coolant is required.


  7. A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as

  8. A.

     Cracking

    B.

     Carbonization

    C.

     Fractional distillation

    D.

     Full distillation


  9. The process is adiabatic, if the value of n in the equation pvn = C, is

  10. A.

     Zero

    B.

     One

    C.

     γ

    D.

     ∝


  11. First law of thermodynamics furnishes the relationship between

  12. A.

     Heat and work

    B.

     Heat, work and properties of the system

    C.

     Various properties of the system

    D.

     Various thermodynamic processes


  13. The measurement of a thermodynamic property known as temperature is based on

  14. A.

     First law of thermodynamics

    B.

     Second law of thermodynamics

    C.

     Zeroth law of thermodynamics

    D.

     None of these


  15. Measurement of temperature is based on

  16. A.

     Thermodynamic properties

    B.

     Zeroth law of thermodynamics

    C.

     First law of thermodynamics

    D.

     Second law of thermodynamics


  17. The basis for measuring thermodynamic property of temperature is given by

  18. A.

     Zeroth law of thermodynamics

    B.

     First law of thermodynamics

    C.

     Second law of thermodynamics

    D.

     Third law of thermodynamics


  19. The absolute zero temperature is taken as

  20. A.

     237°C

    B.

     -273°C

    C.

     -237°C

    D.

     273°C