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High air-fuel ratio is used in gas turbines

A. To increase the output

B. To increase the efficiency

C. To save fuel

D. To reduce the exit temperature

Correct Answer : D.


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  2. Gas turbine as compared to internal combustion engine
  3. The volumetric efficiency of a compressor
  4. In n₁ and n₂ are the indices of compression for the first and second stage of compression,…
  5. The pressure of air at the beginning of the compression stroke is ________ the atmospheric pressure.
  6. Compression efficiency is compared against
  7. Standard air is the air at
  8. The gas in cooling chamber of a closed cycle gas turbine is cooled at
  9. A rocket works with maximum overall efficiency when air craft velocity is equal to the
  10. The volume of air sucked by the compressor during its suction stroke is called
  11. Pick up the wrong statement about advantages of multistage compression
  12. The work ratio of simple gas turbine cycle depends on
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  14. In a reciprocating air compressor, the compression work per kg of air
  15. If the flow of air through the compressor is perpendicular to its axis, then it is a
  16. Inter-cooling in gas turbine results in
  17. In gas turbines, high thermal efficiency is obtained in
  18. The work ratio of a gas turbine plant is defined as the ratio of
  19. The temperature of air at the beginning of the compression stroke is ________ the atmospheric temperature.
  20. In a double acting compressor, the air is compressed
  21. The efficiency and work ratio of a gas turbine plant can be increased by
  22. Which of the following statement is correct?
  23. The output of a gas turbine is 300 KW and its efficiency is 20 percent, the heat supplied is
  24. The compressed air may be used
  25. The blades of gas turbine are made of
  26. A closed gas turbine in which fuel is burnt directly in the air is not possible because of
  27. The pressure ratio of an ideal vaned compressor with increase in mass flow rate
  28. The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is…
  29. For minimum work in multistage compression, assuming same index of compression in all stages
  30. In a centrifugal compressor, the flow of air is ________ to the axis of compressor.