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Difficulty: MediumEmergency Equipment Requirements

During a morning equipment inventory for a tractor hauling general dry freight, a technician notes the presence of spare electrical fuses and three bidirectional red reflective triangles. Which fire extinguisher specification must be added to complete the mandatory safety equipment?

  1. A
    At least one water-pressurized extinguisher with a Class A rating of 2 A
  2. B
    A minimum of two unmounted carbon dioxide extinguishers, each carrying a 2 B:C rating
  3. At least one securely mounted fire extinguisher having a rating of 5 B:C or higherAnswer
  4. D
    At least one dry chemical extinguisher carrying an exclusive Class D rating

Answer

At least one securely mounted fire extinguisher having a rating of 5 B:C or higher
Federal Motor Carrier Safety regulations require that commercial vehicles transporting non-hazardous cargo carry at least one securely mounted, properly charged fire extinguisher with an Underwriters Laboratories rating of 5 B:C or higher, in addition to three bidirectional reflective triangles and spare fuses.

Step-by-Step Solution

1
Identify the mandatory three pieces of emergency equipment required by federal regulations
Every commercial motor vehicle must have spare electrical fuses (if needed), warning devices for stopped vehicles, and at least one properly rated fire extinguisher.
Federal safety standards (49 CFR 393.95) require all three equipment categories to be present before dispatch.
2
Evaluate the specific regulatory rating standard for a non-placarded dry freight operation
Non-hazardous cargo power units require at least one 5 B:C extinguisher (or two 4 B:C extinguishers), securely mounted and fully charged.
The 5 B:C rating ensures sufficient capacity to extinguish burning liquids (Class B) and electrical fires (Class C).

Key Concept

Commercial Motor Vehicle Mandatory Emergency Equipment Specifications
Estimated Time:1m 0s
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Topics

Emergency Equipment Requirements

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