Home / Mechanical Engineering / Compressors,Gas Dynamics and Gas Turbines :: Section 4

Mechanical Engineering :: Compressors,Gas Dynamics and Gas Turbines

  1. In a two stage reciprocating compressor with intercooler, the amount of work saved with incomplete intercooling is __________ that in case of complete intercooling.

  2. A.
    less than
    B.
    more than

  3. The free air delivery is the volume of air that can be delivered by a compressor freely.

  4. A.
    True
    B.
    False

  5. The ratio of the discharge pressure to the inlet pressure of air is called

  6. A.
    compression ratio
    B.
    expansion ratio
    C.
    compressor efficiency
    D.
    volumetric efficiency

  7. A regenerator in a gas turbine improves thermal efficiency.

  8. A.
    Correct
    B.
    Incorrect

  9. The velocity of air entering in a rocket is __________ as compared to an aircraft.

  10. A.
    zero
    B.
    less
    C.
    more
    D.
    same

  11. A compressor mostly used for supercharging of I.C. engines is

  12. A.
    radial flow compressor
    B.
    axial flow compressor
    C.
    roots blower
    D.
    reciprocating compressor

  13. The workdone on a compressor will be minimum if air is taken from

  14. A.
    the atmosphere
    B.
    a source at 0° C
    C.
    a source of low temperature air
    D.
    a source of high temperature air

  15. In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into

  16. A.
    atmosphere
    B.
    vacuum
    C.
    discharge nozzle
    D.
    back to the compressor