A.Self-contained breathing apparatus with a lifeline at……

单项选择题On a vessel making a voyage more than 48 hours long，regulations require that（）.

A.a lifeboat drill be held within 12 hours prior to departure
B.fire pumps be tested by starting within 12 hours prior to departure
C.the emergency generator and lighting system be tested by starting and operating within 12 hours prior to departure
D.the entire steering gear be tested within 12 hours prior to departure

单项选择题On a small boat，which knot is best suited for attaching a line to the ring of an anchor?（）

A.Clove hitch
B.Figure-eight knot
C.Fisherman's bend
D.Overhand knot

单项选择题On a ship，when may a work vest be substituted for a required life preserver?（）

A.To replace a damaged life preserver
B.For use during fire drills
C.For use during boat drills
D.At no time

单项选择题On a ship，watertight doors should be operated（）.

A.during abandon drill
B.during fire drill
C.weekly
D.when the rig is being moved

单项选择题On a ship，how many ring buoys are required to have a buoyant line attached?（）

A.One ring life buoy
B.One ring life buoy on each side of the ship
C.Three ring life buoys
D.Two ring life buoys on each side of the ship