Q.1.
The rotary compressors are suitable for large discharge of air at low pressure.
Q.2.
The volumetric efficiency for reciprocating air compressors is about
Q.3.
A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.
Q.4.
The compressed air may be used
Q.5.
In a four stage compressor, if the pressure at the first and third stage are 1 bar andbar, then the delivery pressure at the fourth stage will be
Q.6.
The reason for volumetric efficiency of reciprocating compressor being less thanpercent is
Q.7.
The work-done on a compressor will be minimum if air is taken from
Q.8.
The maximum delivery pressure in a rotary air compressor is
Q.9.
Propulsion efficiency of the following order is obtained in practice
Q.10.
The type of rotary compressor used in aeroplanes, is of