Hello I was asked a question on a mock exam paper,and I am unsure of the correct answer.

The question was Capacity control of a screw compressor is generally accomplished by:

(a) Hot gas bypass

(b) throttling the suction vapour

(c) Cylinder unloading

(d) sliding valve

I did not get this correct,and i am unsure still.

I think it might be (a) though.

sparrow