The wearing rings are excessively worn
The suction strainer is clogged
The discharge valve is clogged
The shaft is worn
第1题：
how can you create good vacuum on the fresh water (FW) distiller ?
第2题：
worn gland sealing shaft
worn wearing rings
a bent shaft
reversed pump coupling
第3题：
Will we connect the motor with the fresh water pump? No, the pump is ( )_
A.in good order
B.out of order
C.works well
第4题：
turbine
screw
vane
ejector
第5题：
turbine
screw
vane
ejector
第6题：
Which method should be used to warm up the pump turbines prior to discharge ________．
A.Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B.Run the pump at high speed with the discharge valves closed
C.Run the turbine at slow speed with the pump disconnected
D.Shut the discharge valve and run the pump at slow speed
第7题：
Open the bilge pump for inspection
Remove each of the manifold valves
Remove only the manifold valve to the affected bilge-well
Attempt to pump out another bilge well to determine if the entire system is affected
第8题：
How to pump out bilge water in the engine room?
第9题：
primarily to lubricate the shaft seals
due to the inability of this type of pump to lift water to cover the suction (eye) of the impeller
to initially unload the pump by having its head pressure equal to discharge pressure
in order to overcome the potential energy of water in the discharge line
第10题：
allow an alternate main pump to start in the fully loaded condition thus developing immediate full torque
prevent either main pump from being hydraulically motored when idle by cross pressure flow
prevent both units from operating simultaneously which could result in doubling the flow of oil and pressure leading to over pressurization of the system
all of the above