The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost is P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet ?
Correct answer: A
Explanation
To estimate the horsepower and cost of a centrifugal compressor, you generally need the inlet pressure (P), inlet flow rate (Q), and rotational speed (R).