Question 1

What are the seven basic steps of the CDL pre-trip inspection in the correct order?

Accepted Answer

Approach and overview, engine compartment, cab/cockpit, lights, walkaround, signal lights, and final check inside the cab.

Question 2

During a pre-trip inspection, a driver finds one foundation brake with a lining thickness just below the federal minimum under FMCSA Part 393. What is the required action?

Accepted Answer

Place the vehicle out of service. Brake linings below minimum thickness are an out-of-service condition — the vehicle cannot be operated until the brake is repaired and brought into compliance with federal standards.

Question 3

A CDL driver finishes a run at 11 PM, sleeps in the sleeper berth, and departs in the same vehicle at 6 AM. Is a new pre-trip inspection required before the second run?

Accepted Answer

Yes. A pre-trip inspection is required before every trip. Remaining with the vehicle overnight does not satisfy the inspection requirement — the driver must verify vehicle condition before each new departure regardless of prior inspections.

Question 4

During a pre-trip, a driver notices the passenger mirror has a hairline crack across the lower quarter of the glass. The reflection is visible but partially distorted. What action is required?

Accepted Answer

Document the cracked mirror as a defect in the DVIR and assess whether the crack impairs the required field of view. If visibility is compromised, the defect is out-of-service and must be repaired before departure.

Question 5

During the walkaround inspection, what must a driver check on each tire?

Accepted Answer

The driver must check for proper inflation, cuts or bulges in the sidewall, tread depth, and that no lug nuts are missing or loose.

CDL Pre-Trip Inspection

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