单项选择题
A.a mattress B.spilled liquids such as oil or paint C.high voltage electrical gear D.a trash can
All portable fire extinguishers must be capable of bein...
单项选择题All portable fire extinguishers must be capable of being（）.
A.carried by hand to a fire B.carried or rolled to a fire C.recharged in the field D.used on class 'B' fires
All of the following are part of the fire triangle EXCE...
单项选择题All of the following are part of the fire triangle EXCEPT（）.
A.electricity B.fuel C.oxygen D.heat
After extinguishing a paint locker fire using the fixed...
单项选择题After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.
A.opened and burned material removed B.left closed with vents off until all boundaries are cool C.checked for oxygen content D.doused with water to prevent reflash
