Related Questions

In a single stage, single acting reciprocating air compressor without clearance volume, the work-done is maximum during
A Isothermal compression
B Isentropic compression
C Polytropic compression
D None of these
In a single stage, single acting reciprocating air compressor, without clearance volume, the work-done is minimum during
A Isothermal compression
B Isentropic compression
C Polytropic compression
D None of these
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
A large clearance volume in a reciprocating compressor results in
A Reduced volume flow rate
B Increased volume flow rate
C Lower suction pressure
D Lower delivery pressure
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
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
The minimum work required for a three stage reciprocating air compressor is ________ the work required for each stage.
A Equal to
B Double
C Three times
D Six times
There is always some steam left in the clearance space from the previous stroke. This steam left in the clearance space is called
A Wet steam
B Saturated steam
C Superheated steam
D Cushion steam
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 $$1 + {\text{K}} - {\text{K}}{\left( {\frac{{{{\text{p}}_2}}}{{{{\text{p}}_1}}}} \right)^{\frac{{{\text{n}} - 1}}{{\text{n}}}}}$$

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