更多"The pump has a constant stroke and "的相关试题:
[单项选择]The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.
A. control rack
B. delivery valve
C. governor speed
D. plunger crossbar
[单项选择]A double suction centrifugal pump impeller has been installed in the reverse direction, and will （）.
A. have a greater head capacity
B. operate with increased impeller efficiency
C. discharge through the suction side of the pump casing
D. require more power to run the shaft
[单项选择]The （） pump discharges a nearly constant amount of liquid regardless of pressure.
A. mixed-flow
B. axial-flow
C. centrifugal
D. displacement
[单项选择]The amount of fluid delivered by a helical pump can be regulated by （）.
A. throttling the pressure line
B. changing the speed of the rotor
C. either A or B
D. None of the above is tree
[单项选择]The amount of fluid delivered by a screw pump can be regulated by （）.
A. throttling the pressure line
B. changing the speed of the rotor
C. either A or B
D. None of the above is tree
[单项选择]The amount of fluid delivered by a gear pump can be regulated by （）.
A. throttling the pressure line
B. changing the speed of the rotor
C. either A or B
D. None of the above is true
[单项选择]In a jerk pump, the amount of fuel that will be forced through the spray nozzle on each upward stroke of the plunger depends on （）
A. the pump supply pressure
B. the slope of the fuel cam
C. how the plunger is rotated
D. the number of sleeve segments engaged with the rack
[单项选择]Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?（）
A. Salinity of water
B. Temperature of water
C. Atmospheric pressure
D. Type of bottom
[单项选择]The amount of freeboard which a ship possesses has a tremendous effect on its（）.
A. initial stability
B. free surface
C. stability at large angles of inclination
D. permeability
[单项选择]In a radial piston pump, reversal and control of fluid flow are accomplished by moving the （）.
A. central valve
B. radial plunger
C. floating ring
D. cylinder body
[单项选择]Which pump is the self-priming pump?（）
A. turbine
B. centrifugal
C. ejector
D. mixed flow
[单项选择]The （）pump is usually used as the bilge feed pump to an oily water separator.
A. turbine
B. screw
C. vane
D. ejector
[单项选择]A （） pump is that where the volume of the pump chamber is alternately increased to draw the liquid in and then decreased to force the liquid out.
A. injector
B. positive displacement
C. centrifugal
D. centripetal
[单项选择]A mixed-flow pump is a （） pump classified by the working principle.
A. self priming
B. positive displacement
C. reciprocating
D. impeller
[单项选择]As he was the only person who has the key, Simon felt himself（）suspicion.
A. under
B. in
C. beyond
D. upon
[单项选择]Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?（）
A. Impeller
B. Electric motor
C. Volute
D. Eye
[单项选择]Which pump installation would require an external source of sealing water?（）
A. Main circulator pump jacket water cooling
B. Salt water service pump
C. Auxiliary condensate pump
D. Bilge pump
[单项选择]Fuel pump index is （）.
A. the viscosity index
B. the fuel oil contents
C. the starting speed
D. the reading at the rack
