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Mechanical Engineering :: Thermodynamics

  1. Which of the following gas has a minimum molecular mass?

  2. A.

     Oxygen

    B.

     Nitrogen

    C.

     Hydrogen

    D.

     Methane

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  3. The atomic mass of oxygen is

  4. A.

     14

    B.

     16

    C.

     18

    D.

     121

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  5. For the same compression ratio, the efficiency of dual combustion cycle is

  6. A.

     Greater than Diesel cycle and less than Otto cycle

    B.

     Greater than Diesel cycle

    C.

     Less than Diesel cycle

    D.

     Less than Diesel cycle and greater than Otto cycle

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  7. The heating of gas at constant volume is governed by

  8. A.

     Boyle's law

    B.

     Charles' law

    C.

     Gay-Lussac law

    D.

     Avogadro's law

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  9. The door of a running refrigerator inside a room was left open. Which of the following statements is correct?

  10. A.

     The room will be cooled to the temperature inside the refrigerator

    B.

     The room will be cooled very slightly

    C.

     The room will be gradually warmed up

    D.

     The temperature of the air in room will remain unaffected

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  11. Which of the following is the extensive property of a thermodynamic system?

  12. A.

     Pressure

    B.

     Volume

    C.

     Temperature

    D.

     Density

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  13. Which of the following is an intensive property of a thermodynamic system?

  14. A.

     Mass

    B.

     Temperature

    C.

     Energy

    D.

     Volume

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  15. According to Avogadro's law, for a given pressure and temperature, each molecule of a gas

  16. A.

     Occupies same volume

    B.

     Occupies volume proportional to its specific weight

    C.

     Occupies volume inversely proportional to its molecular weight

    D.

     Occupies volume inversely proportional to its specific weight

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  17. The energy of molecular motion appears as

  18. A.

     Heat

    B.

     Potential energy

    C.

     Surface tension

    D.

     Friction

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  19. A perpetual motion machine is

  20. A.

     A thermodynamic machine

    B.

     A non-thermodynamic machine

    C.

     A hypothetical machine

    D.

     A hypothetical machine whose operation would violate the laws of thermodynamics

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