Cylinder clearance in a compressor should be _________________?

Related Mcqs:

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. Clearance volume in actual reciprocating compressors is essential __________________?

   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

8. Isothermal compression efficiency, even when running at high speed, can be approached by using A. multi-stage compression B. cold water spray C. both A. and B. above D. fully insulating the cylinder E. high stroke_________________?

   Isothermal compression efficiency, even when running at high speed, can be approached by using
   A. multi-stage compression
   B. cold water spray
   C. both A. and B. above
   D. fully insulating the cylinder
   E. high stroke

9. A centrifugal compressor works on the principle of__________________?

   A. conversion of pressure energy into kinetic energy
   B. conversion of kinetic energy into pres¬sure energy
   C. centripetal action
   D. generating pressure directly
   E. combination of A. and D.

10. Diffuser in a compressor is used to _____________________?

    A. increase velocity
    B. make the flow stream-line
    C. convert pressure energy into kinetic energy
    D. convert kinetic energy into pressure energy
    E. increase degree of reaction