The performance of air compressor at high altitudes will be ________ as compared to that at sea level.

The compressor performance at higher altitude compared to sea level will be

A

Same

B

Higher

C

Lower

D

Dependent on other factors

A compressor at high altitudes will require ________ power.

A

Same

B

Less

C

More

D

None of these

People who were born at very high altitudes often have larger chests and lungs ------ who live at sea level.

A

those do

B

than do

C

do those

D

than do those

People who were born a very high altitudes often have larger chests and lungs —- who live at sea level.

A

those do

B

than do

C

do those

D

than do those

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

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

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

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

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

The performance of air compressor at high altitudes will be ________ as compared to that at sea level.

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