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
Each commercial fishing vessel must have at least one immersion suit，exposure suit，or life preserver for each（）.
In determining the scope of cable to be used when anchoring，what would NOT be considered?（）.
In the manufacture of wire rope，if the wires are shaped to conform to the curvature of the finished rope before they are laid up，the rope is called（）.
If the winch should fail while you are hauling in the anchor，what prevents the anchor cable from running out?（）
If you were to pass a stopper on a wire rope，what should the stopper be made of?（）
A small light tackle with blocks of steel or wood that is used for miscellaneous small jobs is called a（）.
The equipment required to remove an on-deck oil spill on a barge transfering oil must either be arried on board or（）.
The canopy of an inflatable liferaft should（）.
The davit launched life raft can be boarded（）.
If a davit-launched life raft aboard a vessel cannot be launched because of damage to the davit，you should（）.