CDL General Knowledge Test
Vehicle inspection: practice questions
Our CDL General Knowledge bank has 17 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
Which of these is a sign of a wheel problem?
- Even tire wear across the tread
- Rust streaks around lug nuts
- Shiny hubcaps
- Clean rims
Show the answer
B. Rust streaks around lug nuts — Rust streaks may mean loose lug nuts.
Question 2
What does the seven-step inspection method begin with?
- Checking the radio
- A vehicle overview
- Checking the cargo only
- Starting the engine and driving away
Show the answer
B. A vehicle overview — Approach the vehicle, look for damage, leaks and leaning, and review the last inspection report.
Question 3
Why should you inspect your vehicle?
- For safety, and because federal and state laws require it
- Only when it breaks down or when a warning light comes on
- Only to keep it clean
- Only before selling it
Show the answer
A. For safety, and because federal and state laws require it — Inspections find problems that could cause a crash or breakdown.
Question 4
What emergency equipment must a truck have?
- A spare engine
- Flares only
- Spare electrical fuses (unless it has circuit breakers), three red reflective triangles and a properly charged and rated fire extinguisher
- A first-aid kit only
Show the answer
C. Spare electrical fuses (unless it has circuit breakers), three red reflective triangles and a properly charged and rated fire extinguisher — Check that the extinguisher is charged before each trip.
Question 5
What should you check in the engine compartment?
- Only the horn
- Fluid levels, belts, hoses and leaks
- Only the windshield washer fluid and the wipers
- Only the paint
Show the answer
B. Fluid levels, belts, hoses and leaks — Check oil, coolant, power steering fluid and belts.