The overall isothermal efficiency of the compressor is defined as the ratio of

A Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio
B Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor
C Volume of free air delivery per stroke to the swept volume of the piston
D Isentropic power to the power required to drive the compressor

Correct Answer: Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor

The overall isothermal efficiency of the compressor is defined as the ratio of Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor
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#Mechanical Engineering #Compressors #Gas Turbines And Jet Engines

Related Questions

The overall isothermal efficiency of compressor is defined as the ratio of
A Isothermal h.p. to the BHP of motor
B Isothermal h.p. to adiabatic h.p.
C Power to drive compressor to isothermal h.p.
D Work to compress air isothermally to work for actual compression
Isothermal compression efficiency can be attained by running the compressor
A At very high speed
B At very slow speed
C At average speed
D At zero speed
In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as
A Work factor
B Slip factor
C Degree of reaction
D Pressure coefficient
In multistage compressor, the isothermal compression is achieved by
A Employing inter-cooler
B By constantly cooling the cylinder
C By running compressor at very slow speed
D By insulating the cylinder
Axial flow compressor has the following advantage over centrifugal compressor
A Larger air handling ability per unit frontal area
B Higher pressure ratio per stage
C Aerofoil blades are used
D Higher average velocities
In a centrifugal compressor, the flow of air is ________ to the axis of compressor.
A Parallel
B Perpendicular
C Inclined
D None of these
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?
A Less power requirement
B Better mechanical balance
C Less loss of air due to leakage past the cylinder
D Lower volumetric efficiency
If the flow of air through the compressor is parallel to its axis, then the compressor is
A Reciprocating compressor
B Centrifugal compressor
C Axial flow compressor
D Turbo compressor
For very low pressure and high discharge rate, the compressor used is a/an __________ compressor.
A Axial
B Reciprocating
C Rotary
D None of these
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

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