單項(xiàng)選擇題Chain suspension ladders on a ship must be replaced by fixed ladders if the required chain suspension ladder（）.

A.has been sent in for repair
B.cannot be supported against a vertical flat surface
C.does not extend to the water when the ship lists 15 degrees
D.is not equipped with vertical guard rails on either side


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1.單項(xiàng)選擇題Any person maintaining a listening watch on a bridge-to-bridge radiotelephone must be able to（）.

A.speak English
B.repair the unit
C.send Morse Code
D.speak a language the vessel's crew will understand

2.單項(xiàng)選擇題Any person maintaining a listening watch on a bridge to bridge radio-telephone must be able to（）.

A.Speak English
B.Repair the unit
C.Speak Spanish
D.Send Morse code

4.單項(xiàng)選擇題All removals to be reassembled in order（）of repairs.

A.upon commencement
B.on completion
C.before ending
D.after beginning

5.單項(xiàng)選擇題After riveting is completed，the joints on the shell of a vessel are generally made watertight by（）.

A.faying
B.caulking
C.felt or canvas packing
D.red lead