Commercial motor vehicle fires require specific suppression techniques and extinguishing agents depending on the involved material and vehicle component. Match each fire scenario with its correct immediate suppression procedure.
- Underinflated dual tire that has overheated and begun smolderingApply copious amounts of water or smother with dirt/sand; continue cooling until completely cold to prevent thermal re-ignition.
- Electrical wiring short behind the dashboard instrument clusterDisconnect power or shut off the battery master switch, then discharge a non-conductive B:C or A:B:C dry chemical agent.
- Diesel fuel puddle burning beneath the tractor fuel tankSweep a dry chemical extinguishing agent across the base of the flames; avoid applying water streams that spread the burning liquid.
- Cardboard boxes and wooden pallets burning inside a dry van trailerUse water or a multipurpose A:B:C dry chemical extinguisher to quench and penetrate deep-seated glowing embers.
Answer
Underinflated dual tire fire matches applying copious water or dirt until cold; dashboard electrical fire matches cutting power and discharging non-conductive dry chemical; diesel fuel puddle fire matches sweeping dry chemical at base without using water; cardboard/wood cargo fire matches using water or multipurpose A:B:C extinguisher to quench embers.
Each commercial vehicle fire type is governed by fuel composition and hazard risks: tire fires require sustained cooling or smothering because internal rubber heat causes re-ignition; electrical fires require isolating power before applying non-conductive chemical agents; liquid fuel fires require dry chemical sweeping at the base while strictly prohibiting water; and Class A solid combustibles require penetrating cooling agents to extinguish deep embers.
Step-by-Step Solution
Key Concept
Matching specific commercial vehicle fire classifications and hazard locations with their mandatory containment techniques and extinguishing agents
Estimated Time:1m 30s