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In a closed cycle gas turbine, the air is compressed

A. Isothermally

B. Polytropically

C. Isentropically

D. None of these

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  1. The compressor efficiency is the
  2. In a reciprocating air compressor, the compression work per kg of air
  3. The pressure and temperature conditions of air at the suction of compressor are
  4. Axial flow compressor resembles
  5. Aeroplanes employ following type of compressor
  6. A closed gas turbine in which fuel is burnt directly in the air is not possible because of
  7. The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation
  8. Which of the following statement is wrong?
  9. The capacity of a compressor is 5 m /min refers to
  10. Rotary compressors are used for delivering
  11. High air-fuel ratio in gas turbines
  12. The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is
  13. An air compressor may be controlled by
  14. In open cycle turbojet engines used in military aircraft, reheating the exhaust gas from the turbine…
  15. For speed above 3000 km/hour, it is more advantageous to use
  16. A machine used to raise the pressure of air is called
  17. Inter cooling in compressors
  18. As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure…
  19. In air breathing jet engine, the jet is formed by expanding
  20. The indicated work per unit mass of air delivered is
  21. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in…
  22. The volumetric efficiency of compressor with increase in compression ratio will
  23. The maximum compression ratio in an actual single stage axial flow compressor is of the order of
  24. A 3 m³/min compressor means that it
  25. Gas turbine cycle with regenerator
  26. Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on
  27. Reheating in a gas turbine
  28. A gas turbine used in air craft should have
  29. Out of the following, from where you will prefer to take intake for air compressor
  30. If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches