更多"With reference to a radial piston p"的相关试题:
[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]If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be （）.
A. contaminated fluid
B. pitted thrust rings
C. worn pintle bearings
D. obstructed suctions passage
[单项选择]Which pump is the self-priming pump?（）
A. turbine
B. centrifugal
C. ejector
D. mixed flow
[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]An axial轴向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.
A. radially from the shaft
B. parallel to each other and to the shaft
C. parallel to each other but at a right angle to the shaft
D. at an angle to each other and to the shaft
[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]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]An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.
A. cause loss of hydraulic oil from the system
B. result in extreme damage to the pump
C. cause damage to the pump ff not continually drained from the pump casing
D. result in the system high side pressure to substantially drop off
[单项选择]Among the rings of a piston the （） one is subjected to the greatest load and temperature.
A. bottom
B. middle
C. top
D. none of the above
[单项选择]Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）
A. Stationary
B. Full floating
C. Semi-floating
D. Free rolling
[单项选择]An overtaking situation would be one in which one vessel is approaching another from more than how many degrees abaft the beam? （）
A. 0°
B. 10°
C. 22.5°
D. None of the above
[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]During which of the listed piston stroke of a four-stroke/cycle diesel engine, is the piston moving downward?（）
A. Intake stroke
B. Compression stroke
C. Exhaust stroke
D. Pumping stroke
[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]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 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]As to the piston cooling, of the following, which statement is not true?（）
A. Because the piston is exposed to very high temperature, it must be cooled
B. The lower the piston cooling temperature is, the better it is
C. Both water and lube oil can be used as coolant
D. One of the piston cooling methods is vibration cooling, with better effect
[单项选择]Which one of the following statements best explains the split horizon rule?（）
A. Only routers can split boundaries (horizons) between networks in separate AS numbers.
B. Each AS must keep routing tables converged to prevent dead routes from being advertised across boundaries.
C. Once a route is received on an interface, advertise that route as unreachable back out the same interface.
D. Information about a route should never be sent back in the direction from which the original update came.
[单项选择]Which one is not true?（）
A. Two main areas of skill are involved in the construction of ship
B. There are distinct divisions in responsibilities between naval architects and marine engineers
C. Each ship will assume varying proportions according to its type
D. Ships can be divided into different categories from different perspectives
