Dual electro-hydraulic steering units usually operate ______．A.With both pumps on line at the same timeB.With one pump on standbyC.With the follow-up gear disconnectedD.Only when the rudder is moved amidships
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
相关考题：
Because the timing of injection is crucial, _____ mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.A.gearsB.ramsC.barrelsD.cams
Usually, emergency electricity supplies to_______on boardA.Cargo winchB.WindlassC.Steering gearD.Main air compressor
Air trapped in the hydraulic fluid of a steering system may be indicated byA.the steering pumps overspeedingB.a jammed open relief valveC.a constantly occurring improper rudder responseD.excessive ram pressure
In () technology, two separate and complete processing units run in parallel on a Single chip. A.Hyper-threadingB.CachingC.Multi-taskingD.Dual-core
When the helm is turned on the navigation bridge，which of the listed actions will be the FIRST response in the steering room on a ship equipped with an electro-hydraulic steering gear ________．A.The pumps go to full strokeB.The six-way valve aligns itself with the running pumpC.Both port and starboard cables are energizedD.The synchronous receiver turns，duplicating the helm motion
In an electro-hydraulic steering system, rudder movement is maitained in close synchronization with the steering wheel position by means of the ______.A.trick wheelB.follow-up controlC.six-way valveD.Rapson slide
In （） technology, two separate and complete processing units run in parallel on a Single chip.A、Hyper-threadingB、CachingC、Multi-taskingD、Dual-core
单选题When the helm demands a 20°right rudder movement from an electro-hydraulic steering gear, which of the listed actions will be the FIRST action to happen when this rudder position is attained?（）AThe six-way valve opensBThe steering service pump motor is stoppedCThe follow-up gear takes the pump off strokeDThe cylinder relief valves bypass oil to the suction side the pump
单选题The center line condition of the transmission shaft can be checked by（）Athe border flange’s excursion and flectionBthe both end shafts line’s accordanceCthe border flange’s flection and the both end shafts line’s accordanceDthe border flange’s accordance and both end shafts flection degree
单选题Hydraulic pumps most commonly used in steering systems are of the （）.Alobe typeBscrew typeCaxial piston typeDvolute type
单选题Failure of fuel injection is usually due to trouble in the （）.Aexhaust valvesBmechanical lubricatorsCcooling water pumpsDfuel injection pumps
单选题The steering oar in a lifeboat is usually referred to as the（）.Abumpkin oarBstroke oarCsweep oarDbecket oar
单选题Hydraulically, servo-operated, automatic, change over valves, utilized in a two ram hydraulic steering gear, serve to（）Aallow an alternate main pump to start in the fully loaded condition thus developing immediate full torqueBprevent either main pump from being hydraulically motored when idle by cross pressure flowCprevent both units from operating simultaneously which could result in doubling the flow of oil and pressure leading to over pressurization of the systemDall of the above
单选题Certain requirements must currently be met by a ship’s steering system.There must be （）independent means of steering, although where two identical power units are provided, an auxiliary unit is not required.AoneBtwoCthreeDfour
单选题Air trapped in the hydraulic fluid of a steering system may be indicated by（）Athe steering pumps overspeedingBa jammed open relief valeCa constantly occurring improper rudder responseDexcessive ram pressure
单选题Dual electro-hydraulic steering units usually operate （）.Awith both pumps on line at the same timeBwith one pump on standbyCwith the follow-up gear disconnectedDonly when the rudder is moved amidships
单选题If a severe leak develops in the electro-hydraulic steering gear unit is necessary when（）ALoss of vessel steeringBOverheating of the gyrocompassCJamming of the six-way valeDJamming of the follow-up device
单选题The follow-up gear on an electro-hydraulic steering gear（）Arelieves excessive fluid pressureBtakes the pump off stroke when the desired rudder angle is attainedCsynchronizes wheel position with the rudder positionDreturns the rudder to midposition when the wheel is released
单选题Which of the following types of hydraulic pumps would be used in a steering system?（）ALobeBScrewCRadial pistonDVolute
单选题Which of the devices listed, when used on an electro-hydraulic steering gear, keeps the movement of the redder closely in step with the steering wheel?（）AThe follow-up gearBThe rudder angle indicatorCThe synchronous electric transmitterDA rudder angle limit switch
单选题In an electro-hydraulic steering system, under movement is maintained in close synchronization with the steering wheel position by means of the （）.Atrick-wheelBfollow-up controlCsix-way valveDRapson slide
单选题In an emergency，the electro-hydraulic steering units can be directly controlled by the（）.Atrick wheelBrapson slideCfollow-up gearDreceiver unit
单选题If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the （）.Atrick wheelBaccumulatorCstandby pumpDtelemotor
单选题When there is no movement of the rams on an electro-hydraulic steering gear, the tilting box of the running pump is （）.Aset for maximum torqueBon the purge and vent strokeCin the neutral positionDrotating backwards
单选题On an electro-hydraulic steering gear, which of the listed devices will keep the rudder from over-traveling the bridge signal?（）ARudder angle indicatorBFollow-up gearCElectric transmitterDRudder angle limit switch
单选题To equalize the power factor of two alternators operating in parallel, the （）Afield excitation of both units is adjustedBgovernors of both units are adjustedCphase sequence is alteredDkilowatt load is evenly divided
单选题If a steering motor becomes overloaded, the （）Aoverload condition of 5 % will trip the motor off the line immediatelyBoverload condition will be indicated visually in the machinery spaceCmotor running indicator will begin to flash on and off in response to the sustained overload conditionDstandby steering pump will start automatically and come on the line