网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
In a fixed displacement axial piston hydraulic motor, the speed is varied by（）
A
regulating the ratio between torque and speed via the torque limiter at the motor
B
directing the motor output flow through a bypass line
C
maintaining a constant flow and pressure input
D
controlling the input flow rate
参考答案
参考解析
解析：
暂无解析
更多 “单选题In a fixed displacement axial piston hydraulic motor, the speed is varied by（）A regulating the ratio between torque and speed via the torque limiter at the motorB directing the motor output flow through a bypass lineC maintaining a constant flow and pressure inputD controlling the input flow rate” 相关考题
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
考题
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
考题
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
考题
单选题If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.A
excessive drive motor speedB
excessive pump discharge pressureC
too low of a tilting box angleD
insufficient drive motor speed
考题
单选题A hydraulic motor may be driven by （）.A
an electric motorB
a diesel engineC
a compressorD
oil
考题
单选题Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）A
Constant pressure systemB
Variable pressure systemC
Variable displacement systemD
Constant volume system
考题
单选题Hydraulic pumps most commonly used in steering systems are of the （）.A
lobe typeB
screw typeC
axial piston typeD
volute type
考题
单选题Increased internal leakage, in addition to poor hydraulic system response,and inadequate lubrication, is the result of （）.A
pump bearings in poor conditionB
excessively worn actuator-piston packingC
broken directional control valve centering springsD
low hydraulic oil viscosity
考题
单选题A variable displacement system of hydraulic drives consists of （）.A
a variable displacement axial piston pumpB
a constant displacement axial piston pumpC
a reciprocating piston pumpD
a centrifugal pump
考题
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.A
in the pert positionB
in the starboard positionC
in the neutral positionD
to be dismantled
考题
单选题An AC synchronous transmission type remote steering control system consists of a （）.A
transmitter at the steering station and a receiver at the steering engineB
reversible motor at the steering station geared to the steering pumpsC
small induction motor on the bridge which controls the redder through pulleysD
variable displacement hydraulic pump driven by a reversible DC motor
考题
单选题If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be （）.A
contaminated fluidB
pitted thrust ringsC
worn pintle bearingsD
obstructed suctions passage
考题
单选题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
考题
单选题In a diesel engine, a positive displacement type blower is usually （）A
gear drive by the engineB
driven by an exhaust gas turbineC
driven by a camshaftD
driven by separate motor
考题
单选题On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the （）A
accumulator spring compressorB
balance pistonC
compensating needle valveD
proportional piston
考题
单选题The bore of a diesel engine cylinder describes the （）A
swept volume of the cylinderB
inside diameter of the cylinderC
piston displacement in the cylinderD
length of the piston stroke
考题
单选题The engine is reversed by axial displacement of the camshafts In order for this to be carried out, the cams are （） with inclined transition faces.A
lathedB
shapedC
shrunkD
developed
考题
单选题The output volume of a positive fixed displacement pump can be changed only by （）.A
changing the angle of the tilting plateB
changing the speed of the pumpC
moving the slide block and rotorD
moving the shaft trunnion block
考题
单选题The delivery rate of a variable stroke axial piston hydraulic pump is controlled by varying the position of the （）.A
slide blockB
tilting boxC
pintleD
reaction ring
考题
单选题The rotor of the hydraulic motor rotates at a speed proportional to the （）.A
flow of oilB
pressure of oilC
A and BD
temperature of oil
考题
单选题Which of the following statements is/are true regarding hydraulic pumps in general? （）A
Variable volumes can be obtained with gear pumps only by variation of the pump drive speedB
A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaftC
The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plateD
All of the above
考题
单选题The delivery rate of an axial-piston hydraulic pump is controlled by varying the position of the （）.A
sliding blockB
pintleC
reaction ringD
tilting box or swash plate
考题
单选题With reference to an axial piston pump, which one of the following statements is true?（）A
The cylindrical barrel is coupled to the motorB
The cylindrical barrel has an odd number of boresC
The bores end in socketsD
The sockets fit in the swash plate
考题
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（）.A
cause loss of hydraulic oil from the systemB
result in extreme damage to the pumpC
cause damage to the pump ff not continually drained from the pump casingD
result in the system high side pressure to substantially drop off
考题
单选题An axial轴向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.A
radially from the shaftB
parallel to each other and to the shaftC
parallel to each other but at a right angle to the shaftD
at an angle to each other and to the shaft
考题
单选题A gudgeon pin in a trunk piston may be free to float and rotate, with （） to limit axial movement.A
split pinsB
crankpinsC
dipsticksD
circlips
考题
单选题If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.A
a low load on the unitB
a clogged pump suction strainerC
a blockage in the line between the pump and hydraulic motorD
the hydraulic motor turning too fast
热门标签
最新试卷
