单项选择题
The limit switches on a ships survival-craft winch system（）.
A.stop the winch just before the craft reaches the final stowage position
B.limit the amount of cable on the drum
C.limit the ascent rate
D.stop the winch in case the craft weighs too much
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相关考题
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单项选择题
The lights on the outside of the canopy on an inflatable liferaft operate（）.
A.by turning the globe clockwise
B.by a switch at each light
C.by a light sensor
D.automatically when the raft is inflated -
单项选择题
The inside light in an inflatable liferaft is turned on（）.
A.automatically as the liferaft inflates
B.with a switch near the boarding handle
C.at night because the light has a photosensitive switch
D.by screwing the bulb in after the raft is inflated -
单项选择题
The hydrostatic release on the inflatable liferafts on a fishing vessel must be（）.
A.replaced annually
B.tested monthly
C.serviced annually
D.overhauled quarterly
