NO FLOW STAGE SUCTION PRESSURE PSLL-74

1、Generally speaking, suction heads requ

Generally speaking, suction heads require to be （） for high speed or large capacities than for low speed or small capacities.AgreaterBsmallerCbetterDworse

2、The suction - force principle of opera

The suction - force principle of operation is a typical characteristic of （）.Acentrifugal pumpsBjet pumpsCpropeller pumpsDreciprocating pum

3、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

4、A double suction centrifugal pump impe

A double suction centrifugal pump impeller has been installed in the reverse direction, and will （）.Ahave a greater head capacityBoperate with...

5、The emergency bilge suction or bilge （

The emergency bilge suction or bilge （） is used to prevent flooding of the ship.Ainjection valveBrelief valveCdischarge valveDinlet filter

6、The compressor suction line conveys th

The compressor suction line conveys the refrigerant vapor from （） to （）.Acondenser；evaporatorBevaporator；compressorCcompressor；condenserDNone of the above