LOUISIANA CLASS D "CHAUFFEUR'S" LICENSE FINAL TEST
QUESTIONS WITH SOLUTIONS A+ 2025/2026
✔✔the three braking systems that make up an air brake system are - ✔✔service brake,
parking brake, and emergency brake
✔✔the part of the air brake system which pumps air into the air storage tanks - ✔✔air
compressor
✔✔the part of the air brake system which controls when the air compressor will pump
air into the air storage tanks - ✔✔air compressor governor
✔✔the part of the air brake system which is operated by turning a quarter turn or by
pulling a cable and which must be drained manually at the end of the day - ✔✔manual
air tank drain
✔✔the part of the air brake system in which water and oil are automatically expelled -
✔✔automatice air tank drain
✔✔the ___ of the air brake system protects the tanks and the rest of the system from
too much pressure. it is usually set at 150 psi. if it releases air, something is wrong -
✔✔safety valve
✔✔the ___ part of the air brake system tells you how much pressure is left in the air
tanks - ✔✔supply pressure gauges
✔✔the ____ shows you how much air pressure you are applying to the breaks -
✔✔application pressure gauge
✔✔if the air pressure in the tanks falls below ___, the low air pressure warning will
come on. - ✔✔60psi
✔✔___ brakes are held back by air pressure and are the mechanical force which keeps
the emergency and parking brakes in place - ✔✔spring brakes
✔✔in newer vehicles, you engage the parking breaks by using this knob - ✔✔diamond-
shaped, yellow, push-pull knob
✔✔never push the break pedal down when the ___ brakes are on - ✔✔spring breaks
✔✔the first step to checking the air brakes is to see if the air pressure drops more than
____ pounds in ___ minute - ✔✔3 pounds in 1 minute
,✔✔the second step to checking the air brakes is to ____ - ✔✔make sure the low air
pressure warning signals are working
✔✔the third step of checking the air brakes is to make sure the parking brake valve
closes at ____psi - ✔✔20-40 psi
✔✔7 additional things that must be checked when doing an air brake check - ✔✔1)air
compressor drive belt
2) manual slack adjusters on S-cam brakes
3) brake drums, linings, and hoses
4) rate of air pressure buildup
5) air compressor governor cut-in and cut-out pressures
6) parking brake
7) service brakes
✔✔2 methods of emergency breaking - ✔✔controlled or stab
✔✔the type of emergency breaking in which you put on the brakes as hard as you can
without locking the wheels or turning the steering wheel - ✔✔controlled braking
✔✔the type of emergency braking in which you press the break pedal as hard as you
can, let up when the wheels lock, and push on the brakes again when the vehicle starts
rolling - ✔✔stab breaking
✔✔with air brakes it takes ____ for the air to flow through the lines to the brakes -
✔✔1/2 second or more
✔✔the equation which equals the total stopping distance for vehicles with air brakes -
✔✔perception distance + reaction distance + brake lag distance + effective braking
distance
✔✔if the low air pressure warning for the air brake system comes on you should __ -
✔✔stop and safely park as soon as possible
✔✔brakes can fail or fade from ___ caused by ___ - ✔✔excessive heat caused by
using them too much or improper adjustment
✔✔any time you park you should use the parking brake except for these 2 exceptions -
✔✔the brakes are very hot or in the brakes are wet and the temperature is freezing
✔✔Maximum width for vehicles (Excluding Buses) - ✔✔8 feet
, ✔✔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 -
✔✔Stab braking
✔✔A load will not project more than ____ beyond the width of the body - ✔✔6 inches
✔✔Time it takes for the air to flow through the lines to the brakes - ✔✔One half second
or more
✔✔Maximum width for buses - ✔✔8 feet 6 inches
✔✔If the low air pressure warning comes on, ____ - ✔✔Stop and safely park your
vehicle as soon as possible
✔✔Maximum height for all vehicles - ✔✔13 feet 6 inches
✔✔Brakes can fade or fail from excessive heat caused by ____ and not relying on the
____ effect or ____ - ✔✔Using them too much, engine braking, improper adjustment
✔✔Maximum length for any single vehicle (Including Load) - ✔✔40 feet
✔✔Any time you park, use the parking brakes unless:
1. The brakes are ____
2. The brakes are ____ in freezing temperatures - ✔✔Very hot, very wet
✔✔Maximum length for truck-tractor and trailer combination - ✔✔65 feet
✔✔Most common type of hitch - ✔✔Ball and coupler
✔✔When securing loads contents must not be allowed to ____ - ✔✔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 - ✔✔Separation
✔✔The load must be ____ so the covering or load does not come loose, or in any
manner become a hazard to other motorists - ✔✔Securely fastened
✔✔Make sure the hitch has provisions for the connection of ____ or other approved
safety devices. - ✔✔Safety Chains
QUESTIONS WITH SOLUTIONS A+ 2025/2026
✔✔the three braking systems that make up an air brake system are - ✔✔service brake,
parking brake, and emergency brake
✔✔the part of the air brake system which pumps air into the air storage tanks - ✔✔air
compressor
✔✔the part of the air brake system which controls when the air compressor will pump
air into the air storage tanks - ✔✔air compressor governor
✔✔the part of the air brake system which is operated by turning a quarter turn or by
pulling a cable and which must be drained manually at the end of the day - ✔✔manual
air tank drain
✔✔the part of the air brake system in which water and oil are automatically expelled -
✔✔automatice air tank drain
✔✔the ___ of the air brake system protects the tanks and the rest of the system from
too much pressure. it is usually set at 150 psi. if it releases air, something is wrong -
✔✔safety valve
✔✔the ___ part of the air brake system tells you how much pressure is left in the air
tanks - ✔✔supply pressure gauges
✔✔the ____ shows you how much air pressure you are applying to the breaks -
✔✔application pressure gauge
✔✔if the air pressure in the tanks falls below ___, the low air pressure warning will
come on. - ✔✔60psi
✔✔___ brakes are held back by air pressure and are the mechanical force which keeps
the emergency and parking brakes in place - ✔✔spring brakes
✔✔in newer vehicles, you engage the parking breaks by using this knob - ✔✔diamond-
shaped, yellow, push-pull knob
✔✔never push the break pedal down when the ___ brakes are on - ✔✔spring breaks
✔✔the first step to checking the air brakes is to see if the air pressure drops more than
____ pounds in ___ minute - ✔✔3 pounds in 1 minute
,✔✔the second step to checking the air brakes is to ____ - ✔✔make sure the low air
pressure warning signals are working
✔✔the third step of checking the air brakes is to make sure the parking brake valve
closes at ____psi - ✔✔20-40 psi
✔✔7 additional things that must be checked when doing an air brake check - ✔✔1)air
compressor drive belt
2) manual slack adjusters on S-cam brakes
3) brake drums, linings, and hoses
4) rate of air pressure buildup
5) air compressor governor cut-in and cut-out pressures
6) parking brake
7) service brakes
✔✔2 methods of emergency breaking - ✔✔controlled or stab
✔✔the type of emergency breaking in which you put on the brakes as hard as you can
without locking the wheels or turning the steering wheel - ✔✔controlled braking
✔✔the type of emergency braking in which you press the break pedal as hard as you
can, let up when the wheels lock, and push on the brakes again when the vehicle starts
rolling - ✔✔stab breaking
✔✔with air brakes it takes ____ for the air to flow through the lines to the brakes -
✔✔1/2 second or more
✔✔the equation which equals the total stopping distance for vehicles with air brakes -
✔✔perception distance + reaction distance + brake lag distance + effective braking
distance
✔✔if the low air pressure warning for the air brake system comes on you should __ -
✔✔stop and safely park as soon as possible
✔✔brakes can fail or fade from ___ caused by ___ - ✔✔excessive heat caused by
using them too much or improper adjustment
✔✔any time you park you should use the parking brake except for these 2 exceptions -
✔✔the brakes are very hot or in the brakes are wet and the temperature is freezing
✔✔Maximum width for vehicles (Excluding Buses) - ✔✔8 feet
, ✔✔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 -
✔✔Stab braking
✔✔A load will not project more than ____ beyond the width of the body - ✔✔6 inches
✔✔Time it takes for the air to flow through the lines to the brakes - ✔✔One half second
or more
✔✔Maximum width for buses - ✔✔8 feet 6 inches
✔✔If the low air pressure warning comes on, ____ - ✔✔Stop and safely park your
vehicle as soon as possible
✔✔Maximum height for all vehicles - ✔✔13 feet 6 inches
✔✔Brakes can fade or fail from excessive heat caused by ____ and not relying on the
____ effect or ____ - ✔✔Using them too much, engine braking, improper adjustment
✔✔Maximum length for any single vehicle (Including Load) - ✔✔40 feet
✔✔Any time you park, use the parking brakes unless:
1. The brakes are ____
2. The brakes are ____ in freezing temperatures - ✔✔Very hot, very wet
✔✔Maximum length for truck-tractor and trailer combination - ✔✔65 feet
✔✔Most common type of hitch - ✔✔Ball and coupler
✔✔When securing loads contents must not be allowed to ____ - ✔✔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 - ✔✔Separation
✔✔The load must be ____ so the covering or load does not come loose, or in any
manner become a hazard to other motorists - ✔✔Securely fastened
✔✔Make sure the hitch has provisions for the connection of ____ or other approved
safety devices. - ✔✔Safety Chains
