Examkin

Question

Difficulty: MediumFires and Fire Extinguisher Use

You pull into a weigh station parking area and notice smoke pouring from beneath the tractor hood. After bringing the vehicle to a complete stop, cutting engine power, and retrieving the fire extinguisher, what is the proper procedure for applying the extinguishing agent to the fire?

  1. A
    Unlatch and raise the hood fully to spray the extinguishing agent directly onto the engine block.
  2. Aim the extinguisher stream through the louvers, radiator grille, or from underneath without opening the hood.Answer
  3. C
    Prop the hood open several inches to identify the exact source of the flames before discharging the extinguisher.
  4. D
    Douse the engine compartment using a Class A pressurized water extinguisher from the cab emergency kit.

Answer

Aim the extinguisher stream through the louvers, radiator grille, or from underneath without opening the hood.
Directing the extinguisher stream through the radiator grille, louvers, or from underneath the vehicle extinguishes the fire while keeping the hood closed, which prevents oxygen from feeding the flames.

Step-by-Step Solution

1
Assess the fire location and maintain compartment containment.
The engine hood remains shut to starve the fire of excess oxygen.
Opening the engine compartment introduces atmospheric oxygen, leading to rapid combustion and flashover.
2
Direct the extinguishing agent through available openings.
The extinguishing chemical covers the engine compartment via the grille, side louvers, or underside.
This suppresses the fire while protecting the driver from sudden heat bursts and flaming debris.

Key Concept

Engine Fire Extinguisher Application Technique
Estimated Time:1m 0s
Rate this question

Topics

Fires and Fire Extinguisher Use

More questions from this topic