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In jet engines, paraffin is usually used as the fuel because of its

A. High calorific value

B. Ease of atomisation

C. Low freezing point

D. Both (A) and (C) above

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  1. The pressure ratio in gas turbines is of the order of
  2. The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade…
  3. Intercooling in gas turbines
  4. Efficiency of gas turbine is increased by
  5. Pressure ratio in gas turbines is the ratio of
  6. The material commonly used for air craft gas turbine is
  7. A compressor mostly used for supercharging of I.C. engines is
  8. In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged…
  9. The volume of air sucked by the compressor during its suction stroke is called
  10. Aeroplanes employ following type of compressor
  11. Work ratio of a gas turbine may be improved by
  12. A simple turbojet engine is basically
  13. The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
  14. Isothermal compression though most efficient, but is not practicable because
  15. Rotary compressor is best suited for
  16. Which is false statement about multistage compression?
  17. The air-fuel ratio in gas turbines is of the order of
  18. The ratio of workdone per cycle to the stroke volume of the compressor is known as
  19. The output of a gas turbine is 300 KW and its efficiency is 20 percent, the heat supplied is
  20. The maximum delivery pressure in a rotary air compressor is
  21. A rocket engine for the combustion of its fuel
  22. The inlet pressure is always ________ the discharge pressure.
  23. Which of the following plants is smallest and lightest for generating a given amount of power?
  24. For an irreversible gas turbine cycle, the efficiency and work ratio both depend on
  25. A closed gas turbine in which fuel is burnt directly in the air is not possible because of
  26. The pressure of air at the beginning of the compression stroke is ________ the atmospheric pressure.
  27. The effective power of gas turbines is increased by adding the following in compressor
  28. To avoid moisture troubles, the branch connections from compressed air lines should be taken from
  29. The type of rotary compressor used in aeroplanes, is of
  30. A compressor at high altitudes will require ________ power.