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單項選擇題

A sight glass is installed in the liquid line to indicate the condition of the refrigerant charge and may also indicate the （）.

A.condition of the expansion valve
B.moisture in the system
C.condition of the compressor suction valves
D.condenser temperature

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單項選擇題
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
單項選擇題
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

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