A gear pump belongs to () according to its working principle.
- Areciprocating pumps
- Bpositive displacement pumps
- Ccentrifugal pumps
- Dcentripetal pum
A gear pump belongs to () according to its working principle.
1、A screw pump belongs to () according t
A screw pump belongs to () according to its working principle.Areciprocating pumpsBpositive displacement pumpsCcentrifugal pumpsDcentripetal pum
2、To operate a centrifugal fire pump at
To operate a centrifugal fire pump at reduced capacity, you should ().Areadjust the relief valveBthrottle the suction lineCthrottle the discharge valveDopen the priming line
3、According to Regulations, a power driv
According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 12 knot service speed, must be able to meet the r...
4、According to Regulations, a power driv
According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 20 knot service speed, must be capable of producing a rudder movement at which of the minimum speeds listed below?()A7 knotsB10 knotsC15 knotsD20 knot
5、According to the way the steering gear
According to the way the steering gear is operated, the steering gear may be divided into: hand - steering, () and automatic steering.Ahydraulic steeringBfollow-up steeringCremote control steeringDair controlled steering
6、A centrifugal pump attempting to devel
A centrifugal pump attempting to develop flow against a closed discharge valve has a/an ().Acapacity of 0%Befficiency of 100%Cinternal slippage of 0%Dshut off horsepower rating of 100%