单项选择题
When there is no movement of the rams on an electro-hydraulic steering gear, the tilting box of the running pump is （）.
A.set for maximum torque
B.on the purge and vent stroke
C.in the neutral position
D.rotating backwards
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相关考题
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单项选择题
The structural members of the hull extending in a fore and aft direction are called （）.
A.frames
B.joiners
C.longitudinals
D.knees -
单项选择题
Increased internal leakage, in addition to poor hydraulic system response,and inadequate lubrication, is the result of （）.
A.pump bearings in poor condition
B.excessively worn actuator-piston packing
C.broken directional control valve centering springs
D.low hydraulic oil viscosity -
单项选择题
Most solenoid valves are actuated by （）.
A.a spring
B.an electromagnet
C.the force of gravity
D.refrigerant pressure
