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单选题
If a hydraulic pump on a winch accidentally stops while hoisting，the load will stay suspended because（）.
A
a check valve will close that prevents reverse circulation
B
a centrifugal counterweight counteracts the force of gravity
C
the electric pump motor will cut out
D
the control lever will move to the stop position
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更多 “单选题If a hydraulic pump on a winch accidentally stops while hoisting，the load will stay suspended because（）.A a check valve will close that prevents reverse circulationB a centrifugal counterweight counteracts the force of gravityC the electric pump motor will cut outD the control lever will move to the stop position” 相关考题
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单选题If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.A
excessive drive motor speedB
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in the pert positionB
in the starboard positionC
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to be dismantled
考题
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transmit the rudder angle to the bridge indicatorB
prevent the control linkage from striking the stops when hard overC
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send hydraulic signals to the receiving unit
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add fluid that is the same color as the fluid in the reservoirB
add turbine oil because it is always a good substituteC
add any oil that has the same viscosity as the hydraulic fluidD
check the winch manufacturers instruction book
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excessive internal leakage in the pumpB
low discharge pressure and fluid flowC
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operation of the pump at 100% efficiency
考题
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cold hydraulic fluidD
a clogged air vent falter on the oil reservoir
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cause damage to the pump ff not continually drained from the pump casingD
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考题
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考题
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考题
单选题As for a hydraulic single action vane pump, the inner wall of the stator is usually of （） shape.A
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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
考题
单选题The item（）is not the advantage of the hydraulic winch．A
less jerky startsB
less jerky stopsC
overheating worriesD
none of the overheating worries
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