219. The refrigerant volume flow rate at the entrance of compressor were obtained from a test

on a twin cylinder, single acting 15 cm x 20 cm, 320 rpm compressor ammonia refrigerating

plant to be 33 L/s. Determine the volumetric efficiency of the compressor.

A. 77.65% B. 87.6% C. 97.6% D. 65.65%