DOT DOT Out-of-Service Criteria & Enforcement 1 — Questions and Answers
Question 1: Which organization publishes the North American Standard Out-of-Service Criteria (OOSC) used by DOT inspectors?
- Commercial Vehicle Safety Alliance (CVSA) (Correct answer)
- Federal Motor Carrier Safety Administration (FMCSA)
- American Trucking Associations (ATA)
- National Transportation Safety Board (NTSB)
Correct answer: Commercial Vehicle Safety Alliance (CVSA)
CVSA publishes and updates the North American Standard Out-of-Service Criteria, which are adopted by FMCSA and used as the enforcement standard for roadside inspections.
Question 2: What does placing a vehicle 'out of service' (OOS) mean during a DOT roadside inspection?
- The vehicle is prohibited from operating until the identified defect is corrected (Correct answer)
- The driver must return to their terminal immediately at reduced speed
- The motor carrier must replace the vehicle within 24 hours
- The vehicle's operating authority is permanently revoked
Correct answer: The vehicle is prohibited from operating until the identified defect is corrected
An OOS declaration prohibits further operation of the vehicle until the defect cited under the out-of-service criteria has been repaired and verified.
Question 3: Under CVSA criteria, a driver placed out of service for an hours-of-service violation may NOT resume driving until:
- The driver has accumulated enough off-duty time to be back in compliance (Correct answer)
- The carrier provides a relief driver within 4 hours
- A new paper logbook is obtained from the carrier
- The FMCSA issues a waiver
Correct answer: The driver has accumulated enough off-duty time to be back in compliance
A driver placed OOS for hours-of-service violations must accumulate the required off-duty rest time before legally resuming driving.
Question 4: Which brake defect condition would place a vehicle out of service under CVSA criteria?
- More than 20% of the vehicle's brakes are defective or out of adjustment on vehicles with fewer than 6 braking units (Correct answer)
- Any brake lining with more than 50% remaining friction material
- A brake chamber with a slight moisture residue
- A brake shoe with no visible cracks
Correct answer: More than 20% of the vehicle's brakes are defective or out of adjustment on vehicles with fewer than 6 braking units
CVSA criteria place a vehicle OOS when more than 20% of its service brakes are defective, including being out of adjustment, for vehicles with fewer than 6 braking units.
Question 5: Which tire condition is an automatic out-of-service defect under CVSA criteria?
- A front steering axle tire with a tread depth below 4/32 inch (Correct answer)
- A drive axle tire with 6/32 inch tread depth
- A trailer tire with 5/32 inch tread depth
- A spare tire mounted but not inflated to full pressure
Correct answer: A front steering axle tire with a tread depth below 4/32 inch
CVSA criteria require OOS for any front steering axle tire with tread depth less than 4/32 inch, while drive and trailer axle tires require at least 2/32 inch.
Question 6: What is the Level I North American Standard Inspection?
- A full inspection of both the driver's documents and the vehicle's major safety components (Correct answer)
- An inspection of the driver's documents only
- A walk-around vehicle inspection with no document review
- An inspection performed only at weigh stations
Correct answer: A full inspection of both the driver's documents and the vehicle's major safety components
A Level I inspection is the most comprehensive CVSA inspection, covering both driver qualifications/documentation and a thorough examination of the vehicle's major safety systems.
DOT DOT Out-of-Service Criteria & Enforcement 1
Which organization publishes the North American Standard Out-of-Service Criteria (OOSC) used by DOT inspectors?