The oil was pumped up in the settle ta

1、The volute pump is one in which the im

The volute pump is one in which the impeller （）.Adischarges into a gradually widening channelBhas stationary diffuser vanesCproduces no kinetic energyDAll of the above are true

2、Lube oil pumps taking suction from the

Lube oil pumps taking suction from the sump of most small marine engines are usually （）.Aof the diaphragm typeBof the centrifugal typeCof the positive displacement typeDindependently driven by electric motor

3、In the variable delivery pump, moving

In the variable delivery pump, moving the spindle more from the central point will cause （） fluid to be pumped and consequently （）pressure is generated to drive the rams.Amore；moreBmore；lessCless；moreDless；le

4、The oil （） in the discharging water fr

The oil （） in the discharging water from oil water separator exceeds 15 PPM without alarm, because the coil was burnt out.AfilterBholeCpollutionDcontent

5、In cleaning up an oil spill, the use o

In cleaning up an oil spill, the use of chemical agents would （）.Aabsorb the oil for easy removalBremove the oil from the waterCdisperse or dissolve the oil in the waterDnot affect the oil

6、The remaining oil in the lubricating p

The remaining oil in the lubricating pipes and ducts should be blown out with （）.AatmosphereBthe fresh waterCcompressed airDchemical compound