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Mechanical Engineering :: Thermodynamics

Thermodynamics - Section 1
Thermodynamics - Section 2
Thermodynamics - Section 3
Thermodynamics - Section 4
Thermodynamics - Section 5
Thermodynamics - Section 6
Thermodynamics - Section 7
Thermodynamics - section-8

  1. Carnot cycle has maximum efficiency for

    2. A.

    petrol engine
    B.

    diesel engine
    C.

    reversible engine
    D.

    irreversible engine

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  2. The entropy may be expressed as a function of

    3. A.

    pressure and temperature
    B.

    temperature and volume
    C.

    heat and work
    D.

    all of these

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  3. It is __________ to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.

    4. A.

    possible
    B.

    impossible

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  4. Which of the following is the correct statement?

    5. A.

    All the reversible engines have the same efficiency.
    B.

    All the reversible and irreversible engines have the same efficiency.
    C.

    Irreversible engines have maximum efficiency.
    D.

    All engines are designed as reversible in order to obtain maximum efficiency.

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  5. A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.

    6. A.

    same
    B.

    lower
    C.

    higher

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