A.posted with instructions on the operation of the system
B.ventilated and equipped with explosion-proof switches
C.painted with red and black diagonal stripes
D.equipped with a battery powered source of emergency lighting

A.Carbon dioxide
B.Water (stored pressure)
C.Dry chemical
D.Foam

A.deteriorate and give off noxious gasses
B.spontaneously heat and catch fire
C.attract lice and other vermin and serve as a breeding ground
D.None of the above

A.fire-main system
B.feed-water system
C.freshwater sanitary system
D.domestic water tank

A.two rockets，one of which shall be the buoyant type
B.three rockets，one of which shall be the buoyant type
C.four rockets，two of which shall be the buoyant type
D.five rockets，two of which shall be the buoyant type

A.the cap should be removed to drain the boat when it is waterborne
B.the cage must be free of rubbish or the ball may not seat properly
C.there is an automatic ball check located in a siphon tube
D.the small lever to release the rubber ball float must be turned counterclockwise

A.Frapping line
B.Tricing line
C.Rottmer release
D.Winch remote control wire

A.the mess room
B.each lifeboat
C.each industrial work site
D.each fire station

A.run as fast as the boat will go and keep the sea on the stern
B.secure the engine，put sea anchor over the bow，put out the oars，use sweep oar and back onto beach
C.go in under oars and put out the sea painter
D.put the sea broadside and let the boat drift ashore

A.Secured to the inboard side of a forward thwart and led inboard of the falls
B.Spliced into the ring on the stem post
C.Secured by a toggle to the stem post and led outboard of the falls
D.Secured by a toggle around the outboard side of a forward thwart