2026 Louisiana Class D Chauffeur’s License –
Complete Practice Questions & Answers
Question 1
What is the minimum passing score required to pass the Louisiana Class D
road skills test?
A. 70/100
B. 75/100
C. 80/100
D. 85/100
*Correct Answer: C. 80/100. *
Rationale: To successfully pass the road skills test, you must achieve a score
of 80/100 or higher.
Question 2
The three braking systems that make up an air brake system are:
A. Service brake, parking brake, and emergency brake
B. Front brake, rear brake, and side brake
C. Hydraulic, pneumatic, and electric brake
D. Primary, secondary, and auxiliary brake
*Correct Answer: A. Service brake, parking brake, and emergency
brake. *
,Rationale: The three braking systems that make up an air brake system are
the service brake, parking brake, and emergency brake.
Question 3
The part of the air brake system which controls when the air compressor
will pump air into the air storage tanks is the:
A. Air compressor governor
B. Safety valve
C. Manual air tank drain
D. Automatic air tank drain
*Correct Answer: A. Air compressor governor. *
Rationale: The air compressor governor controls when the air compressor will
pump air into the air storage tanks.
Question 4
If the air pressure in the tanks falls below what level, will the low air
pressure warning come on?
A. 40 psi
B. 50 psi
C. 60 psi
D. 70 psi
*Correct Answer: C. 60 psi. *
Rationale: If the air pressure in the tanks falls below 60 psi, the low air
pressure warning will come on.
,Question 5
_____ brakes are held back by air pressure and are the mechanical force
which keeps the emergency and parking brakes in place.
A. Service
B. Spring
C. Hydraulic
D. Drum
*Correct Answer: B. Spring brakes. *
Rationale: Spring brakes are held back by air pressure and are the
mechanical force which keeps the emergency and parking brakes in place.
Question 6
In newer vehicles, you engage the parking brakes by using this knob:
A. Round, red, push-pull
B. Diamond-shaped, yellow, push-pull
C. Square, blue, twist
D. Oval, green, push-button
*Correct Answer: B. Diamond-shaped, yellow, push-pull. *
Rationale: In newer vehicles, you engage the parking brakes by using a
diamond-shaped, yellow, push-pull knob.
, Question 7
The first step to checking the air brakes is to see if the air pressure drops
more than _____ pounds in _____ minute.
A. 2 pounds in 2 minutes
B. 3 pounds in 1 minute
C. 4 pounds in 2 minutes
D. 5 pounds in 1 minute
*Correct Answer: B. 3 pounds in 1 minute. *
Rationale: The first step to checking the air brakes is to see if the air pressure
drops more than 3 pounds in 1 minute.
Question 8
What is the equation for the total stopping distance for vehicles with air
brakes?
A. Perception distance + reaction distance + braking distance
B. Perception distance + reaction distance + brake lag distance + effective
braking distance
C. Reaction distance + brake lag distance + stopping distance
D. Perception distance + stopping distance
*Correct Answer: B. Perception distance + reaction distance + brake
lag distance + effective braking distance. *
Rationale: The total stopping distance for vehicles with air brakes is the sum
of perception distance, reaction distance, brake lag distance, and effective
braking distance.
Complete Practice Questions & Answers
Question 1
What is the minimum passing score required to pass the Louisiana Class D
road skills test?
A. 70/100
B. 75/100
C. 80/100
D. 85/100
*Correct Answer: C. 80/100. *
Rationale: To successfully pass the road skills test, you must achieve a score
of 80/100 or higher.
Question 2
The three braking systems that make up an air brake system are:
A. Service brake, parking brake, and emergency brake
B. Front brake, rear brake, and side brake
C. Hydraulic, pneumatic, and electric brake
D. Primary, secondary, and auxiliary brake
*Correct Answer: A. Service brake, parking brake, and emergency
brake. *
,Rationale: The three braking systems that make up an air brake system are
the service brake, parking brake, and emergency brake.
Question 3
The part of the air brake system which controls when the air compressor
will pump air into the air storage tanks is the:
A. Air compressor governor
B. Safety valve
C. Manual air tank drain
D. Automatic air tank drain
*Correct Answer: A. Air compressor governor. *
Rationale: The air compressor governor controls when the air compressor will
pump air into the air storage tanks.
Question 4
If the air pressure in the tanks falls below what level, will the low air
pressure warning come on?
A. 40 psi
B. 50 psi
C. 60 psi
D. 70 psi
*Correct Answer: C. 60 psi. *
Rationale: If the air pressure in the tanks falls below 60 psi, the low air
pressure warning will come on.
,Question 5
_____ brakes are held back by air pressure and are the mechanical force
which keeps the emergency and parking brakes in place.
A. Service
B. Spring
C. Hydraulic
D. Drum
*Correct Answer: B. Spring brakes. *
Rationale: Spring brakes are held back by air pressure and are the
mechanical force which keeps the emergency and parking brakes in place.
Question 6
In newer vehicles, you engage the parking brakes by using this knob:
A. Round, red, push-pull
B. Diamond-shaped, yellow, push-pull
C. Square, blue, twist
D. Oval, green, push-button
*Correct Answer: B. Diamond-shaped, yellow, push-pull. *
Rationale: In newer vehicles, you engage the parking brakes by using a
diamond-shaped, yellow, push-pull knob.
, Question 7
The first step to checking the air brakes is to see if the air pressure drops
more than _____ pounds in _____ minute.
A. 2 pounds in 2 minutes
B. 3 pounds in 1 minute
C. 4 pounds in 2 minutes
D. 5 pounds in 1 minute
*Correct Answer: B. 3 pounds in 1 minute. *
Rationale: The first step to checking the air brakes is to see if the air pressure
drops more than 3 pounds in 1 minute.
Question 8
What is the equation for the total stopping distance for vehicles with air
brakes?
A. Perception distance + reaction distance + braking distance
B. Perception distance + reaction distance + brake lag distance + effective
braking distance
C. Reaction distance + brake lag distance + stopping distance
D. Perception distance + stopping distance
*Correct Answer: B. Perception distance + reaction distance + brake
lag distance + effective braking distance. *
Rationale: The total stopping distance for vehicles with air brakes is the sum
of perception distance, reaction distance, brake lag distance, and effective
braking distance.
