A. the ratio of stroke volume to clearance volume
B. the ratio of the air actually delivered to the amount of piston displacement
C. reciprocal of compression ratio
D. index of compressor performance
E. proportional to compression ratio
Related Mcqs:
- Volumetric efficiency of air compressors is of the order of________________?
A. 20-30%
B. 40-50%
C. 60-70%
D. 70-90%
E. 90-100% - Volumetric efficiency of a compressor without clearance volume________________?
A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. is not dependent upon compressin ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable - Volumetric efficiency of a compressor with clearance volume ________________?
A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. in not dependent upon compression ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable - The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation___________________?
A. 0.1%
B. 0.5%
C. 1.0%
D. 5%
E. 10%. - As the value of index ‘«’ is decreased, the volumetric efficiency will___________________?
A. increase
B. decrease
C. remain unaffected
D. may increase/decrease depending on compressor clearance
E. none of the above - The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature__________________?
A. 0.1%
B. 0.5%
C. 1%
D. 5%
E. 10%. - There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would__________________?
A. remain same
B. decrease
C. increase
D. unpredictable
E. none of the above - The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is_____________________?
A. less
B. more
C. same
D. more/less depending on compressor capacity
E. unpredictable - The maximum propulsion efficiency of a turbojet is attained at around following speed __________________?
A. 550 km/hr
B. 1050km/hr
C. 1700 km/hr
D. 2400km /hr
E. 4000 km/hr - The efficiency of jet engine is__________________?
A. higher at ground
B. higher at high altitudes
C. same at all altitudes
D. higher at high speed
E. lower at low speed
