Reciprocating Compressor VE: 2017 #32

This problem uses the standard reciprocating compressor volumetric efficiency equation (found in the Guidebook or the SPE Handbook Series). It can be difficult to recognize this, though, when you are merely asked for a gas rate.

It's fairly plug-n-chug once you have the necessary equation. The only trick? "L" (gas slippage) is not given so you must draw on experience assuming it's between 0-5%. When I did this problem I used 0%, then 5%, and found both gave the same answer "B": (A) 7.4 SCF/min (B) 8.4 SCF/min (C) 9.4 SCF/min (D) 6.4 SCF/min.

Compressors: 2018 #70

Problem 70: The following statement about reciprocating compressors is most FALSE: 

(A) Crankshaft counterweights cannot eliminate imbalance forces that cause mechanical vibration.
(B) ...concrete foundations...should increase depth not length or width to meet weight requirements...
(C) A suction scrubber handles liquids injected into the compressor through the inlet gas stream...
(D) Volumetric efficiency is a function of the properties of the gas being compressed.

This answer is found on 8 FAC 8. For further reading see the Guidebook referenced pages from HS2. But it's really common sense; concrete foundations should increase length or width sans depth to meet weight requirements (for soil stability).