Mechanical energy in transition is referred to as （）.

A.compressor lubrication will be improved
B.oil will not leave the crankcase
C.compressor valves will be damaged
D.oil may congeal in the evaporator

A.examine the condition of the propeller
B.chip and paint all hull protection zincs
C.install new docking plugs in all cofferdams
D.inspect the hull for hogging or sagging

A.the suction and discharge valves
B.tools and equipment served by compressed air
C.air line reducing valves
D.all of the above