The workers in that factory manufacture furniture.A．promoteB．paintC．polishD．produce

If you must pump bilges while a vessel is in port，you should pump only ______．

A.If discharge is led to a shore tank or barge

B.During the hours of darkness

C.On the outgoing tide

D.As much as is necessary

If a bilge pump failed to build up discharge pressure, you should check for _____.

A.excessive water in the bilges

B.a clogged suction strainer

C.oil in the bilges

D.All of the above

A.Delivery check valve

B.Pump barrel

C.Tubing to the injector

D.Cam follower

A.Cargo tank ballast

B.Segregated ballast

C.Engine room bilges

D.Cargo pump room bilges

Accidental flooding of the engine room bilges by the bilge main is prevented by().

A.stop-check valves installed in the bilge suction manifolds

B.using a positive displacement reciprocating bilge pump

C.installing educators in all bilge rose boxes

D.installing a swing check before each bilge valve

A.the circuit breaker

B.for leaks in the suction piping

C.relief valve .is not properly seated

D.the suction strainer

A.pump must always be primed

B.volute must impart a radial and rotary motion of the water suction side

C.connection must guide the liquid to the lantern rings

D.stuffing box should not be allowed any water leakage

A.fuel pump should be removed and all connections blanked off

B.cylinder oil feed rate should be increased slightly above that used at normal sea speed

C.cylinder oil feed rate should be reduced

D.cylinder oil feed rate should be increased to the maximum flow capable of the metering pump

A.only the replacement of the entire pump would be acceptable

B.the injection pump and injection nozzle must be replaced

C.either the barrel or plunger must be replaced

D.the barrel and plunger must be replaced as a unit

Why are removable sleeves installed on centrifugal pump shafts？

A.They make it easier to replace the pump shaft packing

B.They can be economically replaced as they wear out

C.They can be removed when it is necessary to lighten the weight of the pump

D.They increase the strength of the shaft