Related Mcqs:

1. 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

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. 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

5. 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

6. 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

7. 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

8. 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

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. 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