Select the correct answer. Jennifer, a construction manager at a construction firm, has to hire several contractors and subcontractors for a new project. She negotiates and finalizes contracts with the selected contractors and subcontractors. Which responsibility of a construction manager does Jennifer portray? A. project planning B. time management C. contract administration D. quality management

The catalogue for a refrigerant 22, four-cylinder, hermetic compressor operating at 29 r/s. a condensing temperature of 40°c and an evaporating temperature of -4°c shows a refrigeration capacity of 115 kw. at this operating point, the motor (its efficiency is 90 percent) draws 34.5 kw. the bore of the cylinders is 87 mm and the piston stroke is 70 mm. the performance data are based on 8°c of sub-cooling of the liquid leaving the condenser. compute (a) the actual volumetric efficiency and (b) the compression efficiency.