Question 28 of 30
Which statement is true concerning the use of dry chemical extinguishers?
A
You should direct the spray at the top edges of structural smoke screens
B
You should direct the spray at the base of the fire
C
They are deployed safely on metal fires like sodium or magnesium
D
They provide deep cooling to prevent any risk of re-ignition
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Answer & Explanation
The correct answer is Option B: You should direct the spray at the base of the fire.
When using dry chemical extinguishers, the spray should always be directed at the base of the fire. This action smothers the fire by interrupting the chemical chain reaction and forming a barrier.