单项选择题
A.The fire pump B.Exposed hard piping C.The hydrant valve D.The fire hose
What is the MOST important consideration when determini...
单项选择题What is the MOST important consideration when determining how to fight an electrical fire?（）
A.Whether the fire is in machinery or passenger spaces B.Danger of shock to personnel C.The amount of toxic fumes created by the extinguisher D.Maintaining electrical power
What is the most important characteristic of the exting...
单项选择题What is the most important characteristic of the extinguishing agent in fighting a class C fire?（）
A.Weight B.Temperature C.Electrical nonconductivity D.Cost
What is required in addition to the heat，fuel，and oxyge...
单项选择题What is required in addition to the heat，fuel，and oxygen of the fire triangle to have a fire?（）
A.Electricity B.Chain reaction C.Pressure D.Smoke
