Related Questions

With increase in compression ratio, the volumetric efficiency of air compressor
A Increases
B Decreases
C Remains same
D May increase or decrease (depends on the suction pressure)
Volumetric efficiency of a compressor decreases with ________ in compression ratio.
A Decrease
B Increase
C Remain same
D Does not change
The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.
A P, Q and R
B P and R
C R and S
D P, R and S
If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by
A $$1 - {\text{K}} + {\text{K}}{\left( {\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}}} \right)^{\frac{1}{{\text{n}}}}}$$
B $$1 + {\text{K}} - {\text{K}}{\left( {\frac{{{{\text{p}}_2}}}{{{{\text{p}}_1}}}} \right)^{\frac{1}{{\text{n}}}}}$$
C $$1 - {\text{K}} + {\text{K}}{\left( {\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}}} \right)^{\frac{{{\text{n}} - 1}}{{\text{n}}}}}$$
D $$1 + {\text{K}} - {\text{K}}{\left( {\frac{{{{\text{p}}_2}}}{{{{\text{p}}_1}}}} \right)^{\frac{{{\text{n}} - 1}}{{\text{n}}}}}$$
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 compression ratio
D May increase/decrease depending on compressor capacity
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
The volumetric efficiency of a compressor
A Increases with decrease in compression ratio
B Decreases with decrease in compression ratio
C Increases with increase in compression ratio
D Decreases with increase in compression ratio
With the decrease in compression ratio, the volumetric efficiency
A Does not change
B Increases
C Decreases
D First decrease and then increase
Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.
A Increase
B Decrease
C Not change
D Exponentially decrease
For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will
A Increase
B Decrease
C Remain unaffected
D Other factors control it

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