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MCQs

Total Questions : 164 | Page 2 of 17 pages
Question 11. Slip factor in a centrifugal compressor indicates the amount of air leaked from the storage vessel.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> No
Answer: (b).No
Question 12. A turbo-prop is preferred to turbo-jet because
  1.    it has high propulsive efficiency at high speeds
  2.    it can fly at super sonic speeds
  3.    it can fly at high elevations
  4.    it has high power for take off
 Discuss Question
Answer: Option D. -> it has high power for take off
Answer: (d).it has high power for take off
Question 13. The ratio of the isentropic work to the Euler's work is known as pressure coefficient.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Yes
Answer: (a).Yes
Question 14. A 3 m³/min compressor means that it
  1.    compresses 3 m³/min of standard air
  2.    compresses 3 m³/ min of free air
  3.    delivers 3 m³/ min of compressed air
  4.    delivers 3 m³/ min of compressed air at delivery pressure
 Discuss Question
Answer: Option B. -> compresses 3 m³/ min of free air
Answer: (b).compresses 3 m³/ min of free air
Question 15. The air power of the compressor is also known as
  1.    indicated power
  2.    brake power
  3.    frictional power
  4.    none of these
 Discuss Question
Answer: Option A. -> indicated power
Answer: (a).indicated power
Question 16. The degree of reaction is usually kept __________ for all types of axial flow compressors.
  1.    0.2
  2.    0.3
  3.    0.4
  4.    0.5
 Discuss Question
Answer: Option D. -> 0.5
Answer: (d).0.5
Question 17. The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
  1.    pressure drop across the valves
  2.    superheating in compressor
  3.    clearance volume and leakages
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 18. The mean effective pressure of the compressor is the
  1.    actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
  2.    volume of air delivered by the compressor
  3.    volume of air sucked by the compressor during its suction stroke
  4.    none of the above
 Discuss Question
Answer: Option D. -> none of the above
Answer: (d).none of the above
Question 19. For minimum work in multi-stage compression, the workdone on all stages should be equal.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Yes
Answer: (a).Yes
Question 20. A compressor at high altitudes will require __________ power.
  1.    same
  2.    less
  3.    more
  4.    None of these
 Discuss Question
Answer: Option B. -> less
Answer: (b).less

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