Question :
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.
1. P and R
2. P, Q and R
3. P, Rand S
4. R and S
Answer :
2 - P, Q and R
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