单项选择题
A.splash method B.mechanical force feed lubricators C.detached sump method D.internal cooling passages in the crankshafts and connecting rods
While troubleshooting a refrigeration system for low he...
单项选择题While troubleshooting a refrigeration system for low head pressure, liquid refrigerant flooding back from the evaporator is determined to be the causeIt may be necessary to （）.
A.change the expansion valve adjustment B.readjust the water regulating valve to increase the flow of water C.purge air from the condenser D.clean the waterside of the condenser
Air trapped in the hydraulic fluid of a steering system...
单项选择题Air trapped in the hydraulic fluid of a steering system should be indicated by （）.
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
