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Turbofan engine employs

A. One air stream

B. Two or more air streams

C. No air stream

D. Solid fuel firing

Correct Answer : B.


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  1. The type of rotary compressor used in gas turbines, is of
  2. The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called
  3. A turboprop is preferred to turbojet because
  4. Cylinder clearance in a compressor should be
  5. A machine used to raise the pressure of air is called
  6. A simple turbojet engine is basically
  7. The ratio of specific weight/h.p. of gas turbine and I.C engines may be typically of the order of
  8. In the axial flow gas turbine, the work ratio is the ratio of
  9. Separators are generally used in air compressor installations
  10. Maximum delivery pressure is a rotary air compressor is of the order of
  11. The net work input required for compressor with increase in clearance volume
  12. A centrifugal compressor works on the principle of
  13. Isothermal compression efficiency can be attained by running the compressor
  14. Gas turbine as compared to internal combustion engine
  15. In a single stage, single acting reciprocating air compressor, without clearance volume, the workdone…
  16. The most efficient method of compressing air is to compress it
  17. The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ =…
  18. The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is…
  19. Inter-cooling in gas turbine results in
  20. Work ratio of a gas turbine may be improved by
  21. Rotary compressors are suitable for
  22. Reheating in a gas turbine
  23. In a reciprocating air compressor, the compression work per kg of air
  24. The mean effective pressure of the compressor is the
  25. Pick up the correct statement
  26. In jet propulsion power unit, the inlet duct of diverging shape is used in order to
  27. When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades…
  28. For maximum work, the reheating should be done to an intermediate pressure of (Where p₁ = Maximum…
  29. Pressure ratio in gas turbines is the ratio of
  30. The combustion efficiency of a gas turbine using perfect combustion chamber is of the order of