self priming
positive displacement
reciprocating
impeller
第1题：
If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?
A.Pump only if the discharge is led to a shore tank or barge
B.Pump only during the hours of darkness
C.Pump only on the outgoing tide
D.Pump only as much as is necessary
第2题：
cargo pump pressure gauges
crossover lines interconnecting two pumps
suction side of pumps
atmosphere through pump vents
第3题：
Which statement is NOT true?
A.While displacement pump works, volume of the working chamber will increase and decrease alternately
B.A gear pump always has two gears
C.Any vane pump will have a rotor within a ring
D.A balanced vane pump has two outlet ports and they are positioned symmetrically
第4题：
one size larger than the pump discharge nozzle
the same size as the pump discharge nozzle
one size smaller than the pump discharge nozzle
installed with a short radius elbow at the pump
第5题：
reciprocating pumps
positive displacement pumps
centrifugal pumps
centripetal pumps
第6题：
The amount of fuel delivered by a helical plunger fuel injection pump is controlled by ______.
A.varying the pump discharge pressure
B.varying the pump return pressure
C.rotation of the pump plunger
D.rotation of the pump barrel
第7题：
crankshaft
camshaft
piston rod
rack and pinion
第8题：
Which statement is NOT true?
A.In a simple vane pump, the rotor and cam ring are exactly concentric
B.Balanced vane pump has an elliptical cam ring
C.Liquid in both gear pump and vane pump are forced out to the outlet.
D.Balanced vane pumps can work at a higher pressure than the simple vane pump
第9题：
centerline of the pump and the level of the liquid in the suction well when the source of liquid is below the pump
centerline of the pump and the suction liquid level when the source of liquid is above the pump
centerline of the pump and the level of the discharge liquid
liquid levels of the suction and discharge
第10题：
screw pump
centrifugal pump
eductor
gear pump