單項(xiàng)選擇題

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

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單項(xiàng)選擇題

The hydraulic oil most likely to thin out when hot and thick when cold would have a viscosity index of（）

A.20
B.40
C.60
D.80

單項(xiàng)選擇題

When the steering wheel is turned, oil is directed to the steering gear rams by（）

A.modulating the oil flow with the six-way valve
B.moving the automatic pressure differential valve
C.moving the receiving telemotor which regulates the tow-way valve
D.varying the eccentricity of a floating ting or angle of a tilting box

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When the tilting box of a variable stroke axial-piston pump is perpendicular to the pump shaft, which of the following conditions will exist?（）

你可能感興趣的試題

The hydraulic oil most likely to thin out when hot and thick when cold would have a viscosity index of（）

When the steering wheel is turned, oil is directed to the steering gear rams by（）