To extinguish an electrical fire, you should use （）.
Which extinguishing agent is NOT recommended in the Chemical Data Guide for use on a cyclohexane fire?（）
On a bulk chemical carrier，water should NOT be used as an extinguishing agent to fight a fire if the water may come into contact with the chemical called（）.
Portable foam type fire extinguishers are most effective on（）.
Dry chemical fire extinguishers are effective on which type(s) of fire?（）
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Halon fire extinguishers are NOT effective when used on which types of fires?（）
A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in（）.
SWITCH ON FIRE-EXTINGUISHING SYSTEM.的意思是：开启灭火系统。
（），as the chemical extinguisher agent，should be used for an electric fire.
Halon extinguishers used on a class C fire should be directed at the（）.
This fire extinguisher is to be used only in case of（）.
A foam-type portable fire extinguisher would be most useful in combating a fire in（）.
A galley grease fire on the stove may be extinguished using（）.
A foam-type portable fire extinguisher is most useful in fighting a fire in（）.
Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）
Halon from extinguishers used on a class B fire，should be directed（）.
Which portable fire extinguisher should be used on a class C fire on board a vessel?（）
The class of fire on which a blanketing effect is essential to extinguish the fire is （）.
178．Fire in electrical equipment should be extinguished by using ____
Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire？
