Question

question 46
which are designed to extinguish fires involving combustible metals?
carbon dioxide
dry powder agents
dry chemical agents
aqueous film forming foam (afff)

question 47
extinguishers 40 pounds or less should be installed so that the top of the extinguisher is not more than how many feet above the floor?
1
3
5
6

Explanation:

Identify agent for combustible metals

Combustible metal fires are classified as Class D fires. These fires involve metals like magnesium, titanium, zirconium, sodium, lithium, and potassium. Standard extinguishing agents like water, carbon dioxide, or standard dry chemicals can react violently with burning metals or prove ineffective. Special dry powder agents (such as sodium chloride-based or graphite-based powders) are specifically designed to smother Class D metal fires by forming a crust that excludes oxygen and dissipates heat.

Determine installation height limit

According to NFPA 10 (Standard for Portable Fire Extinguishers), fire extinguishers with a gross weight not exceeding 40 pounds (18.14 kg) must be installed so that the top of the extinguisher is not more than 5 feet (1.5 meters) above the floor. This ensures that the equipment remains accessible and manageable for most individuals to retrieve safely in an emergency.

Answer:

Question 46

• Carbon dioxide
• Dry powder agents (Correct answer)
• Dry chemical agents
• Aqueous Film Forming Foam (AFFF)

Question 47

• 1
• 3
• 5 (Correct answer)
• 6