A.size of the fire when initially observedB.complete co……

单项选择题The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.

A.shield fire fighters from radiant heat
B.break up burning material
C.get the most water possible on the fire
D.drive heat and smoke ahead of the fire fighters

单项选择题The sprinkler system of a survival craft is used to（）.

A.cool the craft in a fire
B.cool the engine
C.spray oil on the sea to calm it
D.spray personnel during a fire

单项选择题The spread of fire is prevented by（）.

A.cooling surfaces adjacent to the fire
B.leaving combustibles in the endangered area
C.increasing the oxygen supply
D.All of the above

单项选择题The spread of fire is NOT prevented by（）.

A.shutting off the oxygen supply
B.cooling surfaces adjacent to the fire
C.removing combustibles from the endangered area
D.removing smoke and toxic gases by ensuring adequate ventilation

单项选择题The remote control for a fixed fire extinguishing system should be（）.

A.painted red and labeled
B.concealed from the crew
C.protected by plexiglass
D.padlocked