单项选择题
A.two or more releasing stations B.automatic release in event of a fire C.an audible alarm and time delay D.an audible and visible alarm
A fire starts on your vessel while refueling. You shoul...
单项选择题A fire starts on your vessel while refueling. You should FIRST（）.
A.stop the ventilation B.sound the general alarm C.determine the source of the fire D.attempt to extinguish the fire
A combination or all-purpose nozzle produces（）.A.low-ve...
单项选择题A combination or all-purpose nozzle produces（）.
A.low-velocity fog only B.a solid stream only C.a solid stream and foam D.a solid stream and fog
A CO2 portable extinguisher is annually checked by（）.A....
单项选择题A CO2 portable extinguisher is annually checked by（）.
A.reading the gage pressure B.weighing the extinguisher C.discharging a small amount of CO2 D.seeing if the seal has been broken
