Texas CDL General Knowledge: Driver Fitness Test 2026

Fitness to drive is a legal question before it is a personal one, and the Texas CDL driver fitness and hours of service test treats it that way. This 2026 Texas CDL hours of service practice test covers the federal limits every commercial driver in Texas works under: the daily driving cap, the on-duty window that starts when you begin your shift, the required break during a long driving stretch, and the weekly totals that force a reset.

Logging is the other half. Records of duty status, the difference between on-duty not driving and off-duty time, and the honesty requirement behind both show up regularly on the Texas CDL general knowledge exam.

Fitness questions round it out. Sleep debt builds quietly, and the manual is blunt that coffee, loud music, and open windows are not remedies. Illness, medication side effects, and vision or hearing standards all belong here as well. Pair this Texas CDL fitness drill with the corresponding chapter of the Texas CDL Manual and the rules stop being numbers to memorize.

Keep going:

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

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