A. to accommedate Valves in the cylinder head
B. to provide cushioning effect
C. to attain high volumetric efficiency
D. to avoid mechanical bang of piston with cylinder head
E. to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head
Related Mcqs:
- 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 clearance volume of the air compressor is kept minimum because____________________?
A. it allows maximum compression to be achieved
B. it greatly affects volumetric efficiency
C. it results in minimum work
D. it permits isothermal compression
E. none of the above - 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% - During peak load periods, the best method of controlling compressors is___________________?
A. start-stop motor
B. constant speed unloader
C. relief valve
D. variable speed
E. none of the above - Rotary compressors are suitable for ____________________?
A. large discharge at high pressure
B. low discharge at high pressure
C. large discharge at low pressure
D. low discharge at low pressure
E. there is no such limitation - Maximum temprature in a gas turbine is of the order of COMPRESSORS, GAS TURBINES AND JET ENGINES______________________?
A. 2500°C
B. 2000°C
C. 1500°C
D. 1000°C
E. 700°C - An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes________________?
A. one adiabatic, two isobaric, and one constant volume
B. two adiabatic and two isobaric
C. two adiabatic, one isobaric and one constant volume
D. one adiabatic, one isobaric and two constant volume
E. two isobaric, two adiabatic and one constant volume - An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes_______________?
A. one adiabatic, two isobaric, and one constant volume
B. two adiabatic and two isobaric
C. two adiabatic, one isobaric and one constant volume,
D. one adiabatic, one isobaric and two constant volume
E. two isobaric, two adiabatic and one constant volume - 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 - The net work input required for compressor with increase in clearance volume_____________________?
A. increases
B. decreases
C. remains same
D. increases/decreases depending on com-pressor capacity
E. unpredictable
