A.The fire pumpB.Exposed hard pipingC.The hydrant valve……

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

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

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

单项选择题What is NOT listed on the metallic name plate required to be attached to hand portable fire extinguishers?（）

A.The rated capacity in gallons，quarts，or pounds
B.The hydrostatic test date of the cylinder
C.The name of the item
D.An identifying mark of the actual manufacturer

单项选择题What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）

A.Effective even if ventilation is not shut down
B.Will not deteriorate in storage
C.Non-corrosive
D.Effective on electrical equipment