更多"GIS开关储能电机运行时间超过多少秒时会发“Hydraulic pum"的相关试题:
[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 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]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]If a hydraulic pump is overheating, the cause may be （）.
A. excessive internal leakage in the pump
B. low discharge pressure and fluid flow
C. excessive fluid level in the hydraulic reservoir
D. operation of the pump at 100% efficiency
[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]有载调压变压器分接开关储油柜应（）主油箱储油柜，以防止分接开关的油渗入主油箱。
A. 高于
B. 不低于
C. 等于
D. 低于
[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]If the pump for a hydraulic anchor windlass is over heating, the cause may be （）.
A. increased pump speed
B. excessive pump discharge pressure
C. too low of a tilting box angle
D. low pump speed
[简答题]水泥原材料试验时，净浆拌制低速搅拌多少秒？停顿多少？高速多少？
[单项选择]空袭警报为响36秒，停多少秒，反复循环3分钟？（）
A. 40秒
B. 60秒
C. 24秒
[单项选择]在7360GPONOLTshub中MACagingtime缺省是多少秒。（）
A. 60s
B. 300s
C. 3600s
D. 7200s
[单项选择]比赛中，女子自由造型时间是多少秒？（）
A. 60
B. 90
C. 120
D. 150
[单项选择]比赛中，男子自由造型时间是多少秒？（）
A. 60
B. 90
C. 120
D. 150
