Volumetric efficiency of a compressor without clearance volume________________?

Related Mcqs:

1. 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

2. 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%.

3. 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%.

4. 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

5. 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

6. Cylinder clearance in a compressor should be _________________?

   A. as large as possible
   B. as small as possible
   C. about 50% of swept volume
   D. about 100% of swept volume
   E. none of the above

7. 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

8. 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

9. 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%

10. Volumetric efficiency is_____________________?

    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