单项选择题
An on-load release system on a survival craft means the cable can be released（）.
A.only when the load is taken off the cable
B.only when there is a load on the cable
C.only when activated by the controls at the lowering station
D.at any time
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相关考题
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单项选择题
An effective braking system for windlasses on rigs in deep water is a(n)（）.
A.larger chain stopper
B.disc backstopping brake
C.hydraulic clutch
D.electrical regenerative braking system -
单项选择题
A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from（）.
A.filling completely
B.developing free surface
C.developing free surface moment
D.collapsing -
单项选择题
A tackle is two blocked when the blocks are（）.
A.equally sharing the load
B.jammed together
C.as far apart as possible
D.rove to the highest mechanical advantage
