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

Correct Answer: Isothermal h.p. to the BHP of motor

The overall isothermal efficiency of compressor is defined as the ratio of Isothermal h.p. to the BHP of motor
Bissoy MCQ
#Mechanical Engineering #Compressors #Gas Turbines And Jet Engines

Related Questions

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
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

Next steps