更多"If a hydraulic pump is overheating,"的相关试题:
[单项选择]Overheating of a hydraulic system may be a result of （）.
A. changing pump discharge pressure in response to normal load variations
B. a high oil level
C. incorrect fluid viscosity
D. continued slow re-circulation of the oil
[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]
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]If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the （）.
A. trick wheel
B. accumulator
C. standby pump
D. telemotor
[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]After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?（）
A. The relief valves in the system should be readjusted
B. The filters and strainers should be checked frequently
C. All system pressure should be readjusted
D. The system should be drained and renewed with a fluid of different operating characteristics
[单项选择]Prior to running the hydraulic pump, examine the system carefully and ensure that the lever of control valves is in （） position.
A. neutral
B. end
C. opening
D. closure
[单项选择]A fire pump may be used for other purposes if（）.
A. the other services are run off a reducing station with a pressure gage
B. one of the required pumps is kept available for use on the fire main system at all times
C. no relief valves are installed
D. all of the above conditions are met
[单项选择]A centrifugal pump may fail to deliver water when first started if the （）.
A. water seal pipe is plugged
B. pump is not primed
C. seal ring is improperly located
D. impeller is flooded
[单项选择]If a hydraulic pump on a winch accidentally stops while hoisting，the load will stay suspended because（）.
A. a check valve will close that prevents reverse circulation
B. a centrifugal counterweight counteracts the force of gravity
C. the electric pump motor will cut out
D. the control lever will move to the stop position
[单项选择]On a ship，a fire pump may be used for other purposes if（）.
A. the other services are run off a reducing station with a pressure gage
B. a separate fire pump is available for use on the fire main
C. all other services are operated by a manifold near the pump
D. All of the above
[单项选择]A hydraulic motor may be driven by （）.
A. an electric motor
B. a diesel engine
C. a compressor
D. oil
[单项选择]As for a hydraulic single action vane pump, the inner wall of the stator is usually of （） shape.
A. circular
B. elliptical
C. rectangular
D. hexagon
[单项选择]Air bubbles in a hydraulic governor can cause （）
A. sluggish response
B. speed droop variations
C. isochronous governing
D. sensitivity increase
[简答题]GIS开关储能电机运行时间超过多少秒时会发“Hydraulic pump fail（液压泵故障）”信号？
[单项选择]The major cause of fuel pump and injection system problems is （）
A. improper adjustments
B. contaminated fuel
C. kinked fuel lines
D. excessive engine vibration
[单项选择]If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.
A. excessive drive motor speed
B. excessive pump discharge pressure
C. too low of a tilting box angle
D. insufficient drive motor speed
