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Mechanical Engineering :: Thermodynamics

  1. In an isolated system, neither the heat and work nor the, mass of the working substance crosses the boundary of the system.True

  2. A.

    True

    B.

    False

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  3. The compression ratio is the ratio of

  4. A.

    swept volume to total volume

    B.

    swept volume to total volume

    C.

    swept volume to clearance volume

    D.

    total volume to clearance volume

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  5. When a fluid is allowed to expand suddenly into a vaccum chamber through an orifice of large dimensions, the process is known as free expansion process.

  6. A.

    True

    B.

    False

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  7. The efficiency of Ericsson cycle is __________ Carnot cycle.

  8. A.

    greater than

    B.

    less than

    C.

    equal to

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  9. One molecule of oxygen consists of __________ atoms of oxygen.2

  10. A.

    2

    B.

    4

    C.

    8

    D.

    16

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