Arizona CDL General Knowledge: Driver Fitness Test 2026

A rested, medically fit driver is a safe driver, and the Arizona CDL driver fitness and hours of service test checks that you know the rules that keep you that way. This 2026 general knowledge practice drill covers the federal hours-of-service limits, required rest breaks, the daily and weekly driving caps, and how a log or electronic device documents every hour you spend on duty.

Physical fitness rides alongside those hours. Expect questions on the DOT medical certificate, recognizing the warning signs of fatigue, why you must never drive while ill or on impairing medication, and how sleep debt builds until it becomes as dangerous as alcohol. The Arizona MVD wants drivers who manage their own condition honestly.

Hours of service and driver fitness make up one section of the broader written exam. That General Knowledge test is 50 questions with an 80 percent passing score, so lean on this Arizona CDL practice test and the Arizona CDL Manual together. Repeat the drill until the limits and rest requirements stick firmly in memory.

Keep going:

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

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