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Mechanical Engineering :: Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines - section-1
  1. If the flow of air through the compressor is perpendicular to its axis, then it is a

    2. A.

     Reciprocating compressor
    B.

     Centrifugal compressor
    C.

     Axial flow compressor
    D.

     Turbo compressor

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  2. A rocket works with maximum overall efficiency when air craft velocity is equal to the

    3. A.

     Jet velocity
    B.

     Twice the jet velocity
    C.

     Half the jet velocity
    D.

     Average of the jet velocity

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  3. The volumetric efficiency of a compressor

    4. A.

     Increases with decrease in compression ratio
    B.

     Decreases with decrease in compression ratio
    C.

     Increases with increase in compression ratio
    D.

     Decreases with increase in compression ratio

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  4. The ratio of specific weight/h.p. of gas turbine and I.C engines may be typically of the order of

    5. A.

     1: 1
    B.

     2: 1
    C.

     4: 1
    D.

     1: 6

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  5. A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.

    6. A.

     Same
    B.

     Lower
    C.

     Higher
    D.

     None of these

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  6. Aeroplanes employ following type of compressor

    7. A.

     Radial flow
    B.

     Axial flow
    C.

     Centrifugal
    D.

     None of the above

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