Lakshya Education MCQs

Question: In a single stage, single acting reciprocating air compressor, without clearance volume, the work-done is minimum during
Options:
A. Isothermal compression
B. Isentropic compression
C. Polytropic compression
D. None of these
Answer: Option A
Explanation :

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Question 1. In a single stage, single acting reciprocating air compressor without clearance volume, the work-done is maximum during
  1.     Isothermal compression
  2.     Isentropic compression
  3.     Polytropic compression
  4.     None of these
Answer: Option B
Explanation :
Question 2. In a single stage, single acting reciprocating air compressor without clearance volume, the work-done is maximum during
  1.     Isothermal compression
  2.     Isentropic compression
  3.     Polytropic compression
  4.     None of these
Answer: Option B
Explanation :
Question 3. The most efficient method of compressing air is to compress it
  1.     Isothermally
  2.     Adiabatically
  3.     Isentropically
  4.     Isochronically
Answer: Option A
Explanation :
Question 4. In a centrifugal compressor, the flow of air is ________ to the axis of compressor.
  1.     Parallel
  2.     Perpendicular
  3.     Inclined
  4.     None of these
Answer: Option B
Explanation :
Question 5. The compressor capacity is defined as 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
Answer: Option B
Explanation :
Question 6. For an irreversible gas turbine cycle, the efficiency and work ratio both depend on
  1.     Pressure ratio alone
  2.     Maximum cycle temperature alone
  3.     Minimum cycle temperature alone
  4.     Both pressure ratio and maximum cycle temperature
Answer: Option D
Explanation :

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