Regular foam can be used on all but which flammable liquid?()
A、Motor gasoline
B、Jet fuel
C、Crude petroleum
D、Alcohol
A、Motor gasoline
B、Jet fuel
C、Crude petroleum
D、Alcohol
A、Foam conducts electricity B、To be most effective,foam should be directed at the base of the fire C、Foam is most effective on burning liquids which are flowing D、Foam can ONLY be used to extinguish class A fires
A、It is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F) B、Most foams can be used with dry chemicals to attack a fire by two methods C、Foam is effective on combustible metal fires D、Foam can be made with seawater or fresh water
A、increases the size of foam bubbles formed B、increases the rate of foam production C、improves the extinguishing properties of foam D、gives the nozzleman more freedom of movement,since it can be placed anywhere in the hose line
A、Foam should not be used on electrical fires B、One kilo of low expansion foam solution produces much more foam C、Foam is only efficient when it covers the top of burning combustibles D、A stream of foam should be deflected off the deck in order to best agitate the fire
A、It is effective in controlling fire in flowing oil such as coming from a broken fuel line B、It absorbs heat from materials that could cause reignition C、Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishment D、Once the surface is blanketed with foam and the fire is extinguished,no further foam is required