单项选择题
A.the pump over-speeding B.an improper rudder response C.bubbles in the sight glass D.ram relief valves lifting
Overgreasing of ball bearings installed on pumps will r...
单项选择题Overgreasing of ball bearings installed on pumps will result in （）.
A.smoother pump operation B.overheating of the bearing C.reduced corrosion in the bearing D.increased pump capacity
The energy associated with molecules is known as （）.A.k...
单项选择题The energy associated with molecules is known as （）.
A.kinetic energy B.potential energy C.mechanical energy D.thermal energy
“Flooding back” is a condition where the liquid refrige...
单项选择题“Flooding back” is a condition where the liquid refrigerant （）.
A.vaporizes in the condenser B.reaches the compressor through the suction line C.flashes in the liquid line D.condenses in the receiver
