Examkin

Question

Difficulty: MediumFire Safety and Classification

When confronting an incipient-stage fire in an automotive repair facility, technicians must operate portable fire extinguishers using the standardized PASS sequence. Match each stage of the PASS technique with its corresponding operational procedure and tactical objective.

  • PullBreak the plastic inspection seal and disengage the locking pin to free the discharge lever.
  • AimDirect the discharge nozzle toward the bottom of the fuel bed rather than into the rising flames.
  • SqueezeCompress the operating lever toward the carrying handle to open the internal valve and discharge the agent.
  • SweepMove the discharge stream horizontally across the entire width of the burning material until flames are smothered.

Answer

Pull matches breaking the inspection seal and disengaging the locking pin; Aim matches directing the discharge nozzle toward the bottom of the fuel bed; Squeeze matches compressing the operating lever to open the internal valve; Sweep matches moving the discharge stream horizontally across the width of the burning material.
The PASS acronym represents the four essential operational steps for safely discharging a portable fire extinguisher: 'Pull' disengages the mechanical lock, 'Aim' targets the base of the fire where combustion occurs, 'Squeeze' opens the discharge valve, and 'Sweep' distributes the agent evenly over the fuel surface.

Step-by-Step Solution

1
Identify the initial unlocking action of the extinguisher mechanism (P in PASS)
Pull matches with breaking the tamper seal and disengaging the locking pin to enable lever movement.
Fire extinguishers are fitted with safety pins to prevent accidental discharge during storage and transport.
2
Identify the targeting protocol for maximum extinguishing efficiency (A in PASS)
Aim matches with directing the discharge nozzle toward the bottom of the fuel bed.
Applying extinguishing agents directly to the base of the fire attacks the fuel source where combustion takes place.
3
Identify the mechanical valve actuation step (first S in PASS)
Squeeze matches with compressing the operating lever toward the carrying handle.
Compressing the lever opens the internal discharge valve, releasing the pressurized propellant and agent.
4
Identify the motion pattern used to suppress the fire perimeter (second S in PASS)
Sweep matches with moving the discharge stream horizontally across the entire width of the burning material.
A side-to-side sweeping motion creates an unbroken blanket of extinguishing agent across the entire burning surface area.

Key Concept

The PASS acronym defines the four sequential operating steps for portable fire extinguishers: Pull the pin, Aim at the base, Squeeze the lever, and Sweep side to side.
Estimated Time:1m 0s
Rate this question

Topics

Fire Safety and Classification

More questions from this topic