Air intake for an air compressor should be preferably taken from

Out of the following, from where you will prefer to take intake for air compressor

A

From an air conditioned room maintained at 20°C

B

From outside atmosphere at 1°C

C

From coal yard side

D

From a side where cooling tower is located nearby

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 capacity of compressor will be highest when its intake temperature is

A

Lowest

B

Highest

C

Anything

D

Atmospheric

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

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

An instrument to be used for measurement and control should preferably have

A

Dead zone and dead time

B

Linear output and fast response

C

Non-linear output

D

A highly damped response

Air intake for an air compressor should be preferably taken from

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