单项选择题
A.condition of the expansion valve B.moisture in the system C.condition of the compressor suction valves D.condenser temperature
If one hydraulic pump of an electro-hydraulic steering ...
单项选择题If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the （）.
A.trick wheel B.accumulator C.standby pump D.telemotor
The bilge system has been performing well; however, the...
单项选择题The bilge system has been performing well; however, the aft starboard engine room bilgewell suddenly fails to be pumped outWhich of the following should be done first to determine the cause?（）
A.Open the bilge pump for inspection B.Remove each of the manifold valves C.Remove only the manifold valve to the affected bilge-well D.Attempt to pump out another bilge well to determine if the entire system is affected
If a liquid sight flow indicator in a refrigeration sys...
单项选择题If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is （）.
A.too much refrigerant in the system B.oil entrained in the refrigerant C.less than a full charge of refrigerant in the system D.ice crystals forming in the refrigerant
