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Mining industry usually employs following motive power

A. A.C. electric motor

B. Compressed air

C. Petrol engine

D. Diesel engine

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  1. Euler's equation can be used for
  2. For perfect intercooling in a two stage compressor
  3. Gas turbine works on
  4. If the flow of air through the compressor is parallel to its axis, then the compressor is
  5. A centrifugal compressor works on the principle of
  6. If the flow of air through the compressor is perpendicular to its axis, then it is a
  7. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in…
  8. Volumetric efficiency of a compressor with clearance volume
  9. Volumetric efficiency of a compressor decreases with ________ in compression ratio.
  10. The temperature of air at the beginning of the compression stroke is ________ the atmospheric temperature.
  11. Propulsion efficiency of the following order is obtained in practice
  12. In open cycle turbojet engines used in military aircraft, reheating the exhaust gas from the turbine…
  13. The volume of air sucked by the compressor during its suction stroke is called
  14. The overall isothermal efficiency of the compressor is defined as the ratio of
  15. In air breathing jet engine, the jet is formed by expanding
  16. The weight per horse power ratio for gas in Turbine as compared to I.C. engine and steam turbine is
  17. Reciprocating air compressor is best suited for
  18. The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
  19. A rocket works with maximum overall efficiency when air craft velocity is equal to the
  20. In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to
  21. Propulsive efficiency is defined as ratio of
  22. In a single acting reciprocating compressor, the suction, compression and delivery of air takes place…
  23. Pick up the correct statement
  24. The type of rotary compressor used in aeroplanes, is of
  25. Diffuser in a compressor is used to
  26. The closed cycle in gas turbines
  27. The air is delivered ________ in one revolution in case of a three lobbed rotor.
  28. Water gas is produced by
  29. The advantage of multistage compression over single stage compression is
  30. A gas turbine used in air craft should have