80. After using a Halon extinguisher, it should be ______.
80. After using a Halon extinguisher, it should be ______.
138． After using a C0 portable extinguisher，it should be ______.
138． After using a C0 portable extinguisher，it should be ______.
In order to discharge a CO2 portable fire extinguisher, the operator must FIRST ______.
In order to discharge a CO2 portable fire extinguisher, the operator must FIRST ______.
We have installed a/an _____________ next to the cooker in case there is ever a fire. A: lighter B: printer C: extinguisher D: troubleshooter
We have installed a/an _____________ next to the cooker in case there is ever a fire. A: lighter B: printer C: extinguisher D: troubleshooter
If heavy smoke is coming from the paint locker,the first firefighting response should be to（）. A: release the CO fiooding system B: open the door to evaluate of the fire C: enter and use a portable extinguisher D: secure the ventilatio
If heavy smoke is coming from the paint locker,the first firefighting response should be to（）. A: release the CO fiooding system B: open the door to evaluate of the fire C: enter and use a portable extinguisher D: secure the ventilatio
A “fifteen-pound” CO2 extinguisher is so called because（）. A: there are fifteen pounds of CO2 in the container B: the container，when full，weighs fifteen pounds C: the pressure at the discharge nozzle is l5 psi D: the empty container weighs fifteen pounds
A “fifteen-pound” CO2 extinguisher is so called because（）. A: there are fifteen pounds of CO2 in the container B: the container，when full，weighs fifteen pounds C: the pressure at the discharge nozzle is l5 psi D: the empty container weighs fifteen pounds