Question

Difficulty: MediumEmergency Equipment Requirements

Federal regulations require commercial motor vehicles to be equipped with specific emergency safety equipment before operation on public highways. Match each emergency equipment category on the left with its corresponding minimum federal regulatory specification on the right.

  • Emergency warning devices for a stopped vehicle on a highwayThree bidirectional red reflective triangles in serviceable condition
  • Fire extinguisher for a power unit hauling non-hazardous general freightAt least one securely mounted unit rated 5 B:C or two units rated 4 B:C
  • Fire extinguisher for a vehicle transporting placarded hazardous materialsAt least one securely mounted unit rated 10 B:C
  • Spare electrical fuses for vehicles not equipped with automatic circuit breakersAt least one spare for each type and size needed to operate any required electrical part

Answer

Warning devices match with three bidirectional red reflective triangles; Fire extinguisher for non-hazardous general freight matches with a rating of 5 B:C (or two 4 B:C); Fire extinguisher for placarded hazardous materials matches with a rating of 10 B:C; Spare electrical fuses match with at least one spare for each type and size needed.
Each item accurately reflects the Federal Motor Carrier Safety Administration (FMCSA) requirements under 49 CFR § 393.95: 3 bidirectional reflective triangles for warning devices, a 5 B:C rated extinguisher for general freight, a 10 B:C rated extinguisher for placarded hazardous materials, and one spare fuse for each required size and type.

Step-by-Step Solution

1
Identify the standard warning device requirements for stopped commercial vehicles
The minimum requirement is three bidirectional red reflective triangles (or approved burning flares/fusees)
49 CFR § 393.95 requires three reflective triangles to establish safety perimeters behind and around stopped commercial vehicles.
2
Differentiate fire extinguisher ratings based on cargo type
Non-hazardous cargo requires a minimum 5 B:C rating, whereas placarded hazardous materials transport requires a minimum 10 B:C rating
Hazardous materials present elevated fire risks, requiring greater extinguishing capacity.
3
Determine the spare fuse requirement for vehicles with fused electrical systems
At least one spare for each type and size needed to operate any required electrical part
Carrying spare fuses ensures that safety-critical circuits such as lights and wipers can be restored immediately en route.

Key Concept

FMCSA Mandatory Emergency Equipment Specifications
Estimated Time:1m 15s
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