The work done per unit mass of air in compression will’be least when n is equal to______________? / Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs / By admin The work done per unit mass of air in compression will’be least when n is equal to______________? A. 1 B. 1.2 , C. 1.3 D. 1.4 E. 1.5