136) Volumetric efficiency of a compressor decreases with __________ in compression ratio.

137) The speed of rotary air compressor is __________ as compared to reciprocating air compressor.

138) When air is to be compressed at a high pressure, then it is advantageous to use

139) The absolute pressure of air at the outlet of a compressor is called

140) The degree of reaction is usually kept __________ for all types of axial flow compressors.