更多"Which pump is the self-priming pump"的相关试题:
[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]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]With respect to centrifugal pump impellers, which of the following descriptions represents the correct centrifugal pump classification? （）
A. Single stage or multistage
B. High pressure or low pressure
C. Open or close coupled
D. Horizontal or vertical
[单项选择]Which of the following statements about pump operations is NOT a correct statement?（）
A. In order for a fluid to be pumped, a fluid must be made to flow
B. A substance must be cold in order for it to be pumped
C. The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic system
D. A pump must receive its energy from an external source
[单项选择]Which features of a centrifugal pump reduce the need for renewing worn impellers and pump casings?（）
A. Close radial clearance between impeller hub and casing
B. Low rotational speed of impeller
C. Removable end plate
D. Replaceable impeller and casing wearing rings
[单项选择]With reference to a radial piston pump, which one of the following statements is false?（）
A. Surrounding the fixed shaft is a hollow shaft
B. This hollow shaft carries radial bores
C. Each bore is fitted with a well-lapped plunger
D. There are always even numbers of bores
[单项选择]With reference to an axial piston pump, which one of the following statements is true?（）
A. The cylindrical barrel is coupled to the motor
B. The cylindrical barrel has an odd number of bores
C. The bores end in sockets
D. The sockets fit in the swash plate
[单项选择]The injector pump is operated by a cam which drives （） up and down.
A. the needle valve
B. the plunger
C. the piston
D. the cylinder
[单项选择]
As for a hydraulic vane pump, which of the following is in contact with the vanes during working: （）
(1)the rotor
(2)the pump shaft
(3)the external surface of the housing
A. (1) only
B. (2) only
C. (1) and (2)
D. (1),(2)and(3)
[单项选择]
When a hydraulic vane pump is working, which of the following is in contact with the vanes?（）
(1) the rotor
(2) the internal surface of the housing
(3) the external surface of the housing
A. (1) only
B. (2) only
C. (1) and (2)
D. (1), (2) and (3)
[单项选择]Which method should be used to warm up the pump turbines prior to discharge（）.
A. Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B. Run the pump at high speed with the discharge valves closed
C. Run the turbine at slow speed with the pump disconnected
D. Shut the discharge valve and run the pump at slow speed
[单项选择]The fuel injector pump is operated by （） which drives the plunger up and down.
A. a separate motor
B. a cam
C. a generator
D. a chain
[单项选择]The booster pump, which supplies diesel oil to（） , should have a possibility of being powered by compressed air or by emergency power.
A. the main engines
B. the auxiliary engines
C. the emergency generator engine
D. the auxiliary engines and the main engine(s)
[单项选择]The volute pump is one in which the impeller （）.
A. discharges into a gradually widening channel
B. has stationary diffuser vanes
C. produces no kinetic energy
D. All of the above are true
[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
