The variable required to be known in correlations used for estimating – McqOptions

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1.	The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.
A.	P, Q and R
B.	P and R
C.	R and S
D.	P, Rand S
Answer» B. P and R

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