ELDT Pre- and Post-Trip Inspections 2 — Questions and Answers
Question 1: During a pre-trip inspection, how much tread depth is required on the steering axle tires?
- 2/32 inch
- 4/32 inch (Correct answer)
- 6/32 inch
- 8/32 inch
Correct answer: 4/32 inch
Federal rules require at least 4/32 inch of tread depth on front steering axle tires.
Question 2: What is the minimum tread depth allowed on non-steering (drive and trailer) axle tires?
- 1/32 inch
- 2/32 inch (Correct answer)
- 4/32 inch
- 6/32 inch
Correct answer: 2/32 inch
Tires other than the front steering axle must have at least 2/32 inch of tread.
Question 3: When checking the engine oil level, when should the reading be taken for accuracy?
- Immediately after a long drive
- With the engine running at high RPM
- When the engine is warm but shut off and level (Correct answer)
- Only when the engine is cold overnight
Correct 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.
Question 4: A tire is considered flat and must not be driven on when its air pressure is what?
- Under 100 PSI
- Under 50 PSI
- Less than 50% of the maximum rated pressure (Correct answer)
- Any pressure below the sidewall maximum
Correct 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.
Question 5: What defect on a wheel rim is an automatic out-of-service condition?
- Minor surface rust
- Cracked or bent rims (Correct answer)
- Dirty hubcaps
- Faded paint
Correct answer: Cracked or bent rims
Cracked or bent rims can cause the tire to fail and are prohibited.
Question 6: During the walk-around, what should you check about the lug/wheel nuts?
- That they are painted
- That they are loose for easy removal
- For rust trails, cracks, or missing/loose nuts (Correct answer)
- Only their color
Correct 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.
Question 7: What is the correct order for a proper trip inspection routine?
- Post-trip only
- Pre-trip, en-route, and post-trip inspections (Correct answer)
- En-route inspection only
- Whenever the driver feels like it
Correct 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.
ELDT Pre- and Post-Trip Inspections 2
During a pre-trip inspection, how much tread depth is required on the steering axle tires?