Daily Safety Technology Quiz (Single-choice Question) (2016.8.29)
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1. When fighting a **chemical** fire, ____ use sand to cover it in order to prevent further damage. A. Must ； B. Prohibited ； C. Yes, it can ； D. It is best to 2. When using a fire extinguisher to put out a fire, the nozzle of the extinguisher should be directed at the ____ of the flame. A. Upper part ； B. Middle part ； C. Roots ； D, External. The correct answers are: B; C
1. When fighting a **chemical** fire, __B__ use sand to cover it in order to prevent further damage. A. Must ； B. Prohibited ； C. Yes, it can ； D. Best option: 2. When using a fire extinguisher to put out a fire, the nozzle of the extinguisher should be directed at the __C__ of the flame. A. Upper part ； B. Middle part ； C. Roots ； D. External