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Zorluk: OrtaFires and Fire Extinguisher Use

A commercial driver observes heavy smoke coming from beneath the hood, pulls safely onto an open shoulder, and stops. Place the subsequent emergency containment and suppression steps in the correct chronological order.

  1. 1Turn off the engine ignition to stop fluid circulation and shut down electrical power.
  2. 2Retrieve the portable fire extinguisher from its secure cab mounting bracket.
  3. 3Position upwind of the engine compartment while keeping the hood completely closed.
  4. 4Discharge the extinguishing agent through the radiator grille or side louvers toward the base of the flames.
  5. 5Stand back and monitor the engine compartment for any signs of re-ignition.

Cevap

The correct sequence begins with turning off the engine ignition to cut off fuel and electrical power, followed by retrieving the portable extinguisher from the cab. Next, the driver positions upwind while keeping the hood closed, discharges the extinguishing agent through the grille or side louvers toward the base of the fire, and finally stands back to monitor the area for re-ignition.
During an engine fire emergency, the driver must immediately turn off the engine ignition to stop fuel pumping and electrical current. The driver then retrieves the extinguisher, approaches from upwind while keeping the hood closed to avoid supplying oxygen, discharges the chemical agent through external openings like the grille or louvers at the fire's base, and monitors the compartment from a safe distance for re-ignition.

Adım Adım Çözüm

1
Turn off the engine ignition immediately.
The engine stops running, cutting off mechanical and electrical fluid pumping.
Running engines continue to pump fuel and oil under pressure, which rapidly expands under-hood fires.
2
Retrieve the vehicle's onboard fire extinguisher.
The driver is equipped with a charged, rated dry chemical extinguisher.
Commercial motor vehicles carry extinguishers designed specifically for flammable liquid and electrical fires.
3
Approach from upwind while keeping the hood fully latched.
The driver is shielded from smoke and the fire remains oxygen-starved.
Opening the hood introduces fresh oxygen, resulting in flashover that can engulf the cab.
4
Discharge suppression agent through the radiator grille or louvers at the fire base.
The chemical agent knocks down the flames at the fuel source.
Extinguishing chemicals must hit the base of the flames to interrupt the combustion reaction.
5
Observe the compartment from a safe distance.
Flare-ups and re-ignitions are identified quickly while maintaining driver safety.
Residual engine heat and hot exhaust surfaces frequently cause residual fluids to reignite.

Anahtar Kavram

Engine compartment fire containment and suppression protocol
Tahmini Süre:1m 30s
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Konular

Fires and Fire Extinguisher Use

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