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  1. __________ law of thermodynamics ascertains the direction of a particular spontaneous process.

  2. A.
    Zeroth
    B.
    First
    C.
    Second
    D.
    Third

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  3. At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

  4. A.
    72
    B.
    92
    C.
    142
    D.
    192

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  5. The expression, nCv(T2 - T1), is for the __________ of an ideal gas.

  6. A.
    work done under adiabatic condition
    B.
    co-efficient of thermal expansion
    C.
    compressibility
    D.
    none of these

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  7. Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?

  8. A.
    Freon
    B.
    Liquid sulphur dioxide
    C.
    Methyl chloride
    D.
    Ammonia

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  9. Internal energy is equal to the heat absorbed in case of a/an __________ process.

  10. A.
    constant volume
    B.
    polytropic
    C.
    adiabatic
    D.
    constant pressure

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  11. The first law of thermodynamics is a restatement of the law of conservation of

  12. A.
    mass
    B.
    energy
    C.
    momentum
    D.
    none of these

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  13. Joule-Thomson co-efficient for a perfect gas is

  14. A.
    zero
    B.
    positive
    C.
    negative
    D.
    none of these

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  15. In an adiabatic process, the

  16. A.
    heat transfer is zero.
    B.
    temperature change is zero.
    C.
    work done is a path function.
    D.
    enthalpy remains constant.

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  17. A nozzle is a device, which

  18. A.
    increases kinetic energy and decreases pressure.
    B.
    reduces kinetic energy and increases pressure.
    C.
    reduces both kinetic energy and pressure.
    D.
    increases both kinetic energy and pressure.

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  19. Duringthe phase transition, __________ changes.

  20. A.
    pressure
    B.
    volume
    C.
    temperature
    D.
    all (a), (b) and (c)

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