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Mechanical Engineering :: Thermodynamics

  1. Addition of heat at constant pressure to a gas results in

  2. A.

     Raising its temperature

    B.

     Raising its pressure

    C.

     Raising its volume

    D.

     Raising its temperature and doing external work

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  3. Which of the following items is not a path function?

  4. A.

     Heat

    B.

     Work

    C.

     Kinetic energy

    D.

     Thermal conductivity

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  5. An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is

  6. A.

     Feasible

    B.

     Impossible

    C.

     Possible

    D.

     Possible, but with lot of sophistications

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  7. The absolute zero pressure can be attained at a temperature of

  8. A.

     0°C

    B.

     -273°C

    C.

     273 K

    D.

     None of these

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  9. Molecular volume of any perfect gas at 600 × 103 N/m² and 27°C will be

  10. A.

     4.17 m3/kg mol

    B.

     400 m3/kg mol

    C.

     0.15 m3/kg mol

    D.

     41.7 m3/kg mol

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  11. For the same maximum pressure and temperature,

  12. A.

     Otto cycle is more efficient than Diesel cycle

    B.

     Diesel cycle is more efficient than Otto cycle

    C.

     Dual cycle is more efficient than Otto and Diesel cycles

    D.

     Dual cycle is less efficient than Otto and Diesel cycles

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  13. Mixture of ice and water form a

  14. A.

     Closed system

    B.

     Open system

    C.

     Isolated system

    D.

     Heterogeneous system

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  15. The entropy may be expressed as a function of

  16. A.

     Pressure and temperature

    B.

     Temperature and volume

    C.

     Heat and work

    D.

     All of these

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  17. A molecule consisting of one atom is known as

  18. A.

     Mono-atomic

    B.

     Di-atomic

    C.

     Tri-atomic

    D.

     Poly-atomic

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  19. One molecule of oxygen consists of __________ atoms of oxygen.

  20. A.

     2

    B.

     4

    C.

     8

    D.

     16

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