Pre- and Post-Trip Inspections Flashcards

During a pre-trip inspection, how much tread depth is required on the steering axle tires?

Answer: 4/32 inch

Federal rules require at least 4/32 inch of tread depth on front steering axle tires.

What is the minimum tread depth allowed on non-steering (drive and trailer) axle tires?

Answer: 2/32 inch

Tires other than the front steering axle must have at least 2/32 inch of tread.

When checking the engine oil level, when should the reading be taken for accuracy?

Answer: When the engine is warm but shut off and level

Check oil with the engine warm, turned off, and the vehicle on level ground for an accurate reading.

A tire is considered flat and must not be driven on when its air pressure is what?

Answer: Less than 50% of the maximum rated pressure

A tire with less than 50 percent of its correct/maximum pressure is treated as flat.

What defect on a wheel rim is an automatic out-of-service condition?

Answer: Cracked or bent rims

Cracked or bent rims can cause the tire to fail and are prohibited.

During the walk-around, what should you check about the lug/wheel nuts?

Answer: For rust trails, cracks, or missing/loose nuts

Rust trails, cracks, or missing or loose lug nuts indicate the wheel may be coming loose.

What is the correct order for a proper trip inspection routine?

Answer: Pre-trip, en-route, and post-trip inspections

Drivers must perform a pre-trip, monitor the vehicle en-route, and complete a post-trip inspection.