A.sufficient oxygen in a compartment to support life
B.combustible gases present
C.hydrogen gas present
D.All of the above
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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
A.larger chain stopper
B.disc backstopping brake
C.hydraulic clutch
D.electrical regenerative braking system
A.filling completely
B.developing free surface
C.developing free surface moment
D.collapsing
A.equally sharing the load
B.jammed together
C.as far apart as possible
D.rove to the highest mechanical advantage
A.generally shorter than the others and is used to steer with
B.is longer than the others and is used as the stroke oar
C.is raised in the bow of the boat for the steersman to steer by
D.longer than the others used for steering
最新試題
An oxygen indicator can be used to determine if there is（）.
In order to retrieve an inflatable life raft and place it on deck，you should heave on the（）.
Instead of whipping an end of a line，a temporary means of preventing the line from unraveling is to tie a（）.
If you were to pass a stopper on a wire rope，what should the stopper be made of?（）
The davit launched life raft can be boarded（）.
A tackle is two blocked when the blocks are（）.
If an emergency pump control is used as the emergency shutdown on a tanker，it must（）.
Immersion suits must be stowed（）.
It is permissible to place an eye splice in wire rope used as cargo gear providing the splice is made using（）.
The davit aboard a ship is used to（）.