Each explosive laden vehicle used for transport must have at least how many 2A:10BC rated fire extinguishers?

• A. Two
• B. One
• C. Three
• D. Four

Answer: (A)

The key idea here is that transporting explosives requires ready fire suppression with enough coverage to handle a quick developing fire. On explosive-laden vehicles, you must have a reliable means to start controlling a blaze right away, and the rule specifies a minimum number of extinguishers to provide that redundancy and reach.

Two extinguishers with a 2A:10BC rating meet that requirement because the 2A rating shows a reasonable capacity for ordinary combustibles, while the 10BC portion covers flammable liquids and electrical fires. In the event of a fire on a vehicle carrying explosives, you could face fuel or oil fires, electrical faults, and other ignition sources; having two extinguishers ensures you can tackle a fire from more than one location and still have a second ready if the first is used up or out of reach.

Choosing fewer than two would leave too little immediate suppression capability, while more than the stated minimum isn't required by the rule. So the correct practice is to equip the vehicle with at least two extinguishers rated 2A:10BC.