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
The delivery rate of an axial-piston hydraulic pump is controlled by varying the position of the （）.
A
sliding block
B
pintle
C
reaction ring
D
tilting box or swash plate
参考解析
解析：
暂无解析
相关考题：
Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result from a/an( ).A.overload on the pump motorB.low fluid level in the reservoirC.low fluid viscosity around the shaft sealD.high oil level in the sump
The delivery rate of an axial piston hydraulic pump is controlled by varying the position of theA.tilting boxB.slide blockC.pintleD.reaction ring
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
Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by ______.A.permanent loss of pump suctionB.worn shaft sealsC.high level in the oil sumpD.low motor RPM
If one hydraulic pump of an electro-hydraulic steering unit fails, the vessel’s steering can be initially and best maintained by using the ______.A.trick wheelB.accumulatorC.standby pumpD.Telemotor
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The function of a centrifugal pump double volute casing is to （）.Areduce radial thrust to the impellerBdouble the liquid velocity through the pump when compared to a single voluteCreduce hydraulic end thrustDprovide the effect of multi-staging
单选题Prior to running the hydraulic pump, examine the system carefully and ensure that the lever of control valves is in （） position.AneutralBendCopeningDclosure
单选题It is important with all hydraulic systems to ensure that interlocking arrangements provided for pump or motor control levers are （） before the pump driving motor can be started.Ain the pert positionBin the starboard positionCin the neutral positionDto be dismantled
单选题If a hydraulic pump is overheating, the cause may be （）.Aexcessive internal leakage in the pumpBlow discharge pressure and fluid flowCexcessive fluid level in the hydraulic reservoirDoperation of the pump at 100% efficiency
单选题Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by（）Apermanent loss of pump suctionBworn shaft sealsChigh level in the oil sumpDlow motor RPM
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A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.Athe four-way control valve failing to shiftBthe bleeder valve sticking in the open positionCcold hydraulic fluidDa clogged air vent falter on the oil reservoir
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Fuel injection uses the jet pump system and a Woodward type hydraulic （） is used to control engine speed.AcontrollerBgovernorCinstrumentDapparatus
单选题In a shell-and-tube type hydraulic fluid cooler, the amount of heat transferred from the hydraulic fluid to the cooling water depends upon（）Athe temperature of the hydraulic fluidBthe flow rate of the hydraulic fluidCthe temperature of the cooling waterDall of the above
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 housingA(1) onlyB(2) onlyC(1) and (2)D(1),(2)and(3)
单选题As for a hydraulic single action vane pump, the inner wall of the stator is usually of （） shape.AcircularBellipticalCrectangularDhexagon
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In an electro-hydraulic steering gear, any change in relative position between the synchronous receiver and the follow-up gear will result in（）Athe pump going to full strokeBclosing of the six-way valveCdriving the rams up against the stopsDa corresponding slowing or increasing of the pumped flow rate
单选题If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.Aa low load on the unitBa clogged pump suction strainerCa blockage in the line between the pump and hydraulic motorDthe hydraulic motor turning too fast
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