A positive displacement pump is that where the volume of the pump chamber is alternately increased to () and then decreased to ().
- Adraw the liquid in;force the liquid out
- Bforce the liquid out;draw the liquid in
- Csuction;draw
- Ddeliver;outlet
A positive displacement pump is that where the volume of the pump chamber is alternately increased to () and then decreased to ().
1、A position that is obtained by applyin
A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n)().Adead reckoning positionBestimated positionCfixDNone of the above
2、A position that is obtained by applyin
A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n) ().Aestimated positionBdead reckoning positionCfixDNone of the above
3、A mixed-flow pump is a () pump classif
A mixed-flow pump is a () pump classified by the working principle.Aself primingBpositive displacementCreciprocatingDimpeller
4、A pump is defined as device that()
A pump is defined as device that()Aproduces pressureBimparts energy to a fluid to move it from level ‘A’ to level ‘B’Ccreates a vacuum to move a liquid in all installationDis to develop a pressure differential
5、A position that is obtained by using t
A position that is obtained by using two or more intersecting lines of position taken at nearly the same time,is a(n) ().AfixBrunning fixCestimated positionDdead-reckoning positio
6、A position that is obtained by using t
A position that is obtained by using two or more intersecting lines of position,taken at nearly the same time,is a(n)().Aestimated positionBfixCrunning fixDdead-reckoning positio