1. gauge discharge pressure to the gauge intake pressure
2. absolute discharge pressure to the ab-solute intake pressure
3. pressures at discharge and suction corresponding to same temperature
4. stroke volume and clearance volume
absolute discharge pressure to the ab-solute intake pressure
1. to accommodate Valves in the cylinder head
2. to provide cushioning effect
3. to attain high volumetric efficiency
4. to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head
to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head
1. increases
2. decreases
3. remains same
4. increases/decreases depending on compressor capacity
remains same
1. compressor efficiency
2. isothermal efficiency
3. volumetric efficiency
4. mechanical efficiency
mechanical efficiency
1. the ratio of stroke volume to clearance volume
2. the ratio of the air actually delivered to the amount of piston displacement
3. reciprocal of compression ratio
4. index of compressor performance
the ratio of the air actually delivered to the amount of piston displacement
1. 20-30%
2. 40-50%
3. 60-70%
4. 70-90%
70-90\%
1. increases with increase in compression ratio
2. decreases with increase in compression ratio
3. in not dependent upon compression ratio
4. may increase/decrease depending on compressor capacity
decreases with increase in compression ratio
1. increases with increase in compression ratio
2. decreases with increase in compression ratio
3. is not dependent upon compression ratio
4. may increase/decrease depending on compressor capacity
is not dependent upon compression ratio
1. it allows maximum compression to be achieved
2. it greatly affects volumetric efficiency
3. it results in minimum work
4. it permits isothermal compression
it greatly affects volumetric efficiency
1. centrifugal compressor
2. axial compressor
3. pumps
4. all of the above
all of the above