Air Compressor - Air Compressor objective questions and answers


36. In an axial flow compressor the ratio of pressure in the rotor blades to the pressure rise in the compression in one stage.......


   A.What factor

   B.Slip factor

   C.Degree of reaction

   D.Pressure coefficient


✔ View Answer


C.Degree of reaction

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37. The compressor efficiency is the .......


   A.Isothermal HP/indicated HP

   B.Isothermal HP/shaft HP

   C.Total output/air input

   D.Compression work/motor input


✔ View Answer


A.Isothermal HP/indicated HP

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38. Separators in compressor installations are located.........


   A.Before intercooler

   B.After intercooler

   C.After receiver

   C.Between after cooler and air receiver


✔ View Answer


D.Between after cooler and air receiver

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39. An air compressor may be controlled by......


   A.Throttle control

   B.Clearance control

   C.Blow-off control

   D.Any of the above


✔ View Answer


D.Any of the above

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40. For a compressor least work will be done if the compression is .......


   A.Isentropic

   B.Isothermal

   C.Polytropic

   D.None of this


✔ View Answer


B.Isothermal

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