California CDL General Knowledge: Vehicle Inspection Test 2026

A thorough pre-trip inspection catches problems before they become roadside breakdowns, and the California CDL vehicle inspection test checks whether a permit candidate knows what to look for and in what order. This section covers the systematic walk-around every commercial driver performs before starting a route, from tires and brakes to lights and coupling devices. It is one of the most heavily tested categories on the California CDL practice test.

Expect questions on checking tire tread depth and inflation, inspecting brake components for wear, verifying that all lights and reflectors function, and confirming that coupling devices on combination vehicles are secure. The California Commercial Driver Handbook lays out a specific inspection sequence, and drivers hauling freight out of the Ports of Los Angeles and Long Beach or through the Central Valley rely on this exact routine every single day before pulling out.

Vehicle inspection knowledge is one segment of the full 50-question CDL general knowledge exam, where 80 percent, or 40 correct answers, is required to pass. Work through this drill until the inspection sequence is second nature, then move on to the next CDL practice test questions.

Keep going:

• California CDL Practice Test
• California CDL Practice Test 2
• California CDL Practice Test 3
• California CDL Practice Test 4
• California Air Brakes Practice Test
• California CDL Combination Practice Test
• California CDL Pre-Trip Inspection Practice Test
• California Hazmat Practice Test
• California Class A CDL Practice Test
• California CDL Practice Test

Every question traces back to the California CDL Manual - skim the right-of-way and signs chapters before your retake.