1.

A single acting two-stage air compressor deals with 4 m3/min of air at 1.013 bar and 15°C with a speed of 250 rpm. The delivery pressure is 80 bar. If the inter cooling is complete, the intermittent pressure after first stage will be (a) 9 bar (b) 8 bar (c) 7 bar (d) 6 bar

Answer»

Correct option is (a) 9 bar 

For two stage air compressor

Pi =  \(\sqrt{p_1p_2}\) = \(\sqrt{80}\) 

= 9 bar



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