61.
Propulsion efficiency of the following order is obtained in practice

62.
The maximum delivery pressure in a rotary air compressor is

63.
In a closed cycle gas turbine, the air is compressed

64.
In a double acting compressor, the air is compressed

65.
The work-done on a compressor will be minimum if air is taken from

66.
Free air is the air at

67.
Standard air is the air at

68.
The overall efficiency of the compressed air system is the

70.
The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is

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