单选题When the tilting box of a variable stroke axial-piston pump is perpendicular to the pump shaft, which of the following conditions will exist?（）AThe pistons reciprocateBThe ‘B’ end cylinder barrel rotatesCThere is no fluid flowDPower is transmitted hydraulically
单选题
When the tilting box of a variable stroke axial-piston pump is perpendicular to the pump shaft, which of the following conditions will exist?（）
A
The pistons reciprocate
B
The ‘B’ end cylinder barrel rotates
C
There is no fluid flow
D
Power is transmitted hydraulically
参考解析
解析：
暂无解析
相关考题：
The delivery rate of an axial piston hydraulic pump is controlled by varying the position of theA.tilting boxB.slide blockC.pintleD.reaction ring
When using a fuel with a higher than normal sulfur content in an auxiliary four stroke diesel engine, you mayA.maintain higher than normal jacket water temperatureB.change the lube oil more frequently than normalC.maintain a higher air-box temperature than normalD.maintain a higher air-box pressure than normal
The usual number of single-acting pistons used in a variable stroke axial-piston pump isA.3 or 5B.5 or 7C.7 or 9D.9 or 11
The follow-up gear on an electro-hydraulic steering gearA.relieves excessive fluid pressureB.takes the pump off stroke when the desired rudder angle is attainedC.allows for rudder movement faster than the movement of the shipsD.returns the rudder to amidships when the wheel is release
单选题When the desired rudder angle is attained by a typical double mm electro-hydraulic steering gear,the（）.Aram relief valves bypass oil to stop rudder movementBsix-way valve shifts to the neutral flow positionCsteering pump electric motor is de - energized by the transfer switchDfollow-up gear takes the hydraulic pump off stroke
单选题If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.Aexcessive drive motor speedBexcessive pump discharge pressureCtoo low of a tilting box angleDinsufficient drive motor speed
单选题A variable displacement system of hydraulic drives consists of （）.Aa variable displacement axial piston pumpBa constant displacement axial piston pumpCa reciprocating piston pumpDa centrifugal pump
单选题When the steering wheel is turned, oil is directed to the steering gear rams by（）Amodulating the oil flow with the six-way valveBmoving the automatic pressure differential valveCmoving the receiving telemotor which regulates the tow-way valveDvarying the eccentricity of a floating ting or angle of a tilting box
单选题The static suction lift of a pump is the difference in elevation between the （）.Acenterline of the pump and the level of the liquid in the suction well when the source of liquid is below the pumpBcenterline of the pump and the suction liquid level when the source of liquid is above the pumpCcenterline of the pump and the level of the discharge liquidDliquid levels of the suction and discharge
单选题The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.Acontrol rackBdelivery valveCgovernor speedDplunger crossbar
单选题The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.Athe pump cylinderBthe pump camCthe pump plungerDthe pump miler
单选题In an electro-hydraulic steering gear system, when will the variable displacement pump be placed on stroke?（）AWhen the helm is at any angle other than amidshipsBWhen the six-way valve is openedCWhen the ram relief valves liftDWhen the redder angle is different from the position of the helm
单选题Aother name for the “swash plate” in the variable delivery pump is（）Atiltable discBgravity discCdistributing discDcatch plate
单选题When the tilting box of a variable stroke axial-piston pump is perpendicular to the pump shaft, which of the following conditions will exist?（）AThe pistons reciprocateBThe ‘B’ end cylinder barrel rotatesCThere is no fluid flowDPower is transmitted hydraulically
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Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by （）.Aa compressed packing glandBlantern tings between the packing ringsCa liquid sealDthe stuffing box gland
单选题Under normal operating conditions, the rudder is hydraulically locked unless （）.Athe manual trick wheel is engaged for steeringBthe variable stroke pump is off strokeCa rudder order is given by the control systemDan electric power system failure occurs at the steering gear
单选题The output volume of a positive fixed displacement pump can be changed only by （）.Achanging the angle of the tilting plateBchanging the speed of the pumpCmoving the slide block and rotorDmoving the shaft trunnion block
单选题The delivery rate of a variable stroke axial piston hydraulic pump is controlled by varying the position of the （）.Aslide blockBtilting boxCpintleDreaction ring
单选题The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）Afuel delivery pressureBpump plunger diameterCplunger control rack positionDtotal pump stroke
单选题The delivery rate of an axial-piston hydraulic pump is controlled by varying the position of the （）.Asliding blockBpintleCreaction ringDtilting box or swash plate
单选题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（）.Acause loss of hydraulic oil from the systemBresult in extreme damage to the pumpCcause damage to the pump ff not continually drained from the pump casingDresult in the system high side pressure to substantially drop off
单选题If the pump for a hydraulic anchor windlass is over heating, the cause may be （）.Aincreased pump speedBexcessive pump discharge pressureCtoo low of a tilting box angleDlow pump speed
单选题When the follower is on the base circle of the cam, the pump plunger is at the （） of its stroke.AtopBmiddleCbottomDany of the above
单选题The packing installed in the pump stuffing box is lubricated by （）.Agravity and feed oil cupsBgrease cupsChand during installationDleakage through the stuffing box
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The usual number of single-acting pistons used in a variable stroke axial-piston pump is （）.A3 or 5B5 or 7C7 or 9D9 or 11