Which of the following is the non-positive displacement compressor?
Example of non-positive displacement compressor:
(i) Centrifugal compressor
(ii) Axial flow compressor
(iii) Dynamic compressor
(iv) Blade compressor
Reciprocating compressors are usually preferred for
The reciprocating compressors are.suitable for low discharge (maximum limit 50 m3/min) at high delivery pressures (as high as 1000 bar).
Reciprocating compressors have a maximum capacity of
The capacity of a reciprocating air compressor expressed in m3/min refers to volume of
Free air is the air at
In a reciprocating compressor, one should aim at compressing the air
Isothermal compression requires minimum power input.
Isothermal compression through most efficient cannot be realized in practice because that necessitates
Maintaining constant temperature requires large quantity of coolant water. Use of large coolant water makes compressor bulky and decreases the engine speed.
The clearance volume in a reciprocating compressor is provided to
Most suitable choice is (b). Increase of clearance volume decrease the volumetric efficiency, so option (c) is wrong.
Which of the following is not the advantages of multi-stage compression?
There is reduction in work required per stroke and therefore the total driving power is also reduced.
Air motor finds application in following except
Hair dryer is either battery or electrically powered. Compressed air is used in a wide variety of applications where the use of electric motors or S.l. engines is not permissible and where high safety is required to bemet as in mining applications. Pneumatic breakers, picks, spades, rammers, vibrators, riveters etc. form a range of hand tools having wide use in construction work.