Related Questions

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
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
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.
A Reduced
B Increased
C Zero
D None of these
In axial flow compressor, exit flow angle deviation from the blade angle is a function of
A Blade camber
B Blade camber and incidence angle
C Space-chord ratio
D Blade camber and space-chord ratio
In a centrifugal compressor, the flow of air is ________ to the axis of compressor.
A Parallel
B Perpendicular
C Inclined
D None of these
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
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 degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the
A Rotor to static enthalpy rise in the stator
B Stator to static enthalpy rise in the rotor
C Rotor to static enthalpy rise in the stage
D Stator to static enthalpy rise in the stage
Axial flow compressor resembles
A Centrifugal pump
B Reciprocating pump
C Turbine
D Sliding vane compressor
The axial flow compressor is preferred in aircraft gas turbines because of
A Low frontal area
B Higher thrust
C High pressure rise
D None of these

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