单项选择题
A.overfeeding of the expansion valve B.damage to the condenser C.constant running of the compressor D.flooding of the receiver
Mechanical energy in transition is referred to as （）.A....
单项选择题Mechanical energy in transition is referred to as （）.
A.horsepower B.work C.heat D.velocity
If you change from a low pour point lubricant to a high...
单项选择题If you change from a low pour point lubricant to a high pour point lubricant in a refrigeration system, （）.
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
When a vessel is in dry-dock, the vessel’s engineers sh...
单项选择题When a vessel is in dry-dock, the vessel’s engineers should （）.
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
