更多"Air trapped in the hydraulic fluid "的相关试题:
[单项选择]Air trapped in the hydraulic fluid of a steering system would be indicated by（）
A. an improper rudder response
B. hammering noises in the equipment or transmission lines
C. popping or sputtering noises
D. all the above
[单项选择]Most hydraulic steering gears are fitted with relief valves which（）
A. function when the rudder is amidships
B. relieve excess whip pressure from the hydraulic oil system
C. protect the piping assembly from external rudder shock
D. relieve excessive telemotor pressure
[单项选择]Dual electro-hydraulic steering units usually operate （）.
A. with both pumps on line at the same time
B. with one pump on standby
C. with the follow-up gear disconnected
D. only when the rudder is moved amidships
[单项选择]In an emergency，the electro-hydraulic steering units can be directly controlled by the（）.
A. trick wheel
B. rapson slide
C. follow-up gear
D. receiver unit
[单项选择]In an elector-hydraulic steering system, rudder shock is limited by（）
A. a differential gear
B. return springs
C. a hydraulic accumulator
D. relief valves
[单项选择]In an electro-hydraulic steering gear, any change in relative position between the synchronous receiver and the follow-up gear will result in（）
A. the pump going to full stroke
B. closing of the six-way valve
C. driving the rams up against the stops
D. a corresponding slowing or increasing of the pumped flow rate
[单项选择]In an electro-hydraulic steering gear system, when will the variable displacement pump be placed on stroke?（）
A. When the helm is at any angle other than amidships
B. When the six-way valve is opened
C. When the ram relief valves lift
D. When the redder angle is different from the position of the helm
[单项选择]In an electro-hydraulic steering system, under movement is maintained in close synchronization with the steering wheel position by means of the （）.
A. trick-wheel
B. follow-up control
C. six-way valve
D. Rapson slide
[单项选择]On an electro-hydraulic steering gear, which of the listed devices will keep the rudder from over-traveling the bridge signal?（）
A. Rudder angle indicator
B. Follow-up gear
C. Electric transmitter
D. Rudder angle limit switch
[单项选择]When air becomes trapped in the hydraulic fluid of a steering system, the （）.
A. rudder will respond sluggishly
B. hydraulic rams will over-speed
C. sight glass will show bubbles
D. ram relief valves will lift
[单项选择]Hydraulic pumps most commonly used in steering systems are of the （）.
A. lobe type
B. screw type
C. axial piston type
D. volute type
[单项选择]Steering gears can be arranged with hydraulic control equipment known as a （）, or with electrical control equipment.
A. telemeter
B. telemanometer
C. telemotor
D. telemometer
[单项选择]The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）.
A. causes colloid suspension in the cooling water
B. reduces the capability of the lubrication system
C. can form pockets which block the flow of coolant through the system
D. leads to the scuffing of cylinder walls
[单项选择]Air compressors are NOT permitted in which space(s) on a tank barge carrying grade A cargo?（）
A. A cargo handling room
B. A space in which cargo hose is stored
C. An enclosed space containing cargo piping
D. All of the above
[单项选择]The humidifier’s valve of air-condition should be （）, when the temperature is lower than 0℃.
A. decreased
B. increased
C. fixed
D. closed
[单项选择]The humidifier’s valve of air-conditioner should be （）, when the temperature is 5~8°C in the winter.
A. decreased
B. increased
C. fixed
D. closed
[单项选择]After the order “（）” is given, the air system is shut down, the turning gear put in.
A. Finished with Engine
B. Stop the Engine
C. Stand-by Engine
D. Slow-down Engine
