Pre-Trip Inspection Flashcards
7 cards from real CDL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Pre-Trip Inspection flashcards as text
What is the minimum tread depth required for front tires on a commercial vehicle?
Answer: 4/32 of an inch
Front tires must have a minimum tread depth of 4/32 of an inch, while drive and trailer tires require a minimum of 2/32 of an inch.
Which components must be checked when inspecting the air brake system during a pre-trip inspection?
Answer: Brake lines, connections, chambers, slack adjusters, and brake pads or linings
A thorough brake inspection covers all components including air lines, connections, brake chambers, slack adjusters, and pad or lining thickness and condition.
What is the correct method to verify tire inflation pressure during a pre-trip inspection?
Answer: Use a tire pressure gauge to check that each tire meets the manufacturer's recommended pressure
A calibrated tire pressure gauge must be used to verify that each tire is inflated to the correct pressure; visual inspection cannot accurately detect underinflation.
What should you look for when inspecting wheel rims during a pre-trip inspection?
Answer: Cracks, damaged areas, and that all lug nuts are present and tightened
Rims must be inspected for cracks, physical damage, and proper lug nut installation to prevent catastrophic wheel separation while driving.
What must be verified when checking headlights during a pre-trip inspection?
Answer: Both low and high beams work, and lights are clean and properly aimed
Both low and high beams must function, and lights should be clean and properly aimed to provide adequate illumination without creating a hazard for oncoming drivers.
Why is checking wiper blades included in a pre-trip inspection?
Answer: To verify they clear the windshield effectively and are not damaged or worn
Wiper blades must be in good condition and operate effectively to maintain adequate visibility in rain or adverse weather, which is critical for safe driving.
When inspecting the fifth-wheel coupling on a tractor-trailer, what must be verified?
Answer: That the fifth wheel is properly mounted, lubricated, and the locking jaw is fully closed around the kingpin
The fifth wheel must be securely mounted, properly lubricated, and the locking jaw must fully engage the kingpin to prevent trailer separation while driving.