LOUISIANA CLASS D CHAUFFEUR’S LICENSE
2026 STUDY GUIDE COMPLETE COMMERCIAL
DRIVING RULES AND PRACTICE QUESTIONS
◉ a) Press the brake pedal as hard as you can. b) Release the brakes
when the wheels lock up. c) As soon as the wheels start rolling, put
on the brakes fully again. Answer: Stab braking
◉ A load will not project more than ____ beyond the width of the
body. Answer: 6 inches
◉ Time it takes for the air to flow through the lines to the brakes.
Answer: One half second or more
◉ Maximum width for buses. Answer: 8 feet 6 inches
◉ If the low air pressure warning comes on, ____. Answer: Stop and
safely park your vehicle as soon as possible
◉ Maximum height for all vehicles. Answer: 13 feet 6 inches
, ◉ Brakes can fade or fail from excessive heat caused by ____ and not
relying on the ____ effect or ____. Answer: Using them too much,
engine braking, improper adjustment
◉ Maximum length for any single vehicle (Including Load). Answer:
40 feet
◉ Any time you park, use the parking brakes unless:
1. The brakes are ____
2. The brakes are ____ in freezing temperatures. Answer: Very hot,
very wet
◉ Maximum length for truck-tractor and trailer combination.
Answer: 65 feet
◉ Most common type of hitch. Answer: Ball and coupler
◉ When securing loads contents must not be allowed to ____.
Answer: Drop, shift, leak or otherwise escape.
◉ is important to make sure that the size of the ball and coupler
match to prevent ____ of the towed vehicle during transport. Answer:
Separation
2026 STUDY GUIDE COMPLETE COMMERCIAL
DRIVING RULES AND PRACTICE QUESTIONS
◉ a) Press the brake pedal as hard as you can. b) Release the brakes
when the wheels lock up. c) As soon as the wheels start rolling, put
on the brakes fully again. Answer: Stab braking
◉ A load will not project more than ____ beyond the width of the
body. Answer: 6 inches
◉ Time it takes for the air to flow through the lines to the brakes.
Answer: One half second or more
◉ Maximum width for buses. Answer: 8 feet 6 inches
◉ If the low air pressure warning comes on, ____. Answer: Stop and
safely park your vehicle as soon as possible
◉ Maximum height for all vehicles. Answer: 13 feet 6 inches
, ◉ Brakes can fade or fail from excessive heat caused by ____ and not
relying on the ____ effect or ____. Answer: Using them too much,
engine braking, improper adjustment
◉ Maximum length for any single vehicle (Including Load). Answer:
40 feet
◉ Any time you park, use the parking brakes unless:
1. The brakes are ____
2. The brakes are ____ in freezing temperatures. Answer: Very hot,
very wet
◉ Maximum length for truck-tractor and trailer combination.
Answer: 65 feet
◉ Most common type of hitch. Answer: Ball and coupler
◉ When securing loads contents must not be allowed to ____.
Answer: Drop, shift, leak or otherwise escape.
◉ is important to make sure that the size of the ball and coupler
match to prevent ____ of the towed vehicle during transport. Answer:
Separation
