CDL AIR BRAKES ENDORSEMENT EXAM
PREP KIT 2026 BUNDLED PRACTICE
SOLUTION GUIDE
● 3 psi in one minute. Answer: Air loss in a single vehicle (not a
combination unit) should not be more than (. .) with the engine off and
the brakes on.
● 60 psi. Answer: The vehicle must have a warning device which comes
on when the air pressure in the service air tanks falls below:
● The one-way check valve. Answer: If the air system should develop a
leak, what will keep air in the air tanks?
● The service brake system. Answer: Which brake system applies and
releases the brakes when the driver uses the brake pedal?
● Spring pressure. Answer: When using the parking brakes or
emergency brakes, what type of pressure is being used?
● 3 psi in one minute. Answer: The air loss rate for a straight truck or
bus with the engine off and the brakes applied should not be more than:
, ● An air pressure gauge, to show the pressure available for braking.
Answer: Air brake equipped vehicles must have:
● The heavier a vehicle or the faster it is moving, the more heat the
brakes have to absorb to stop it. Answer: Which of the following
statements about brakes is true?
● Emergency brakes. Answer: Three different systems are found on
modern air brake systems; service brakes, parking brakes, and:
● The purpose of engine retarders is to:. Answer: Help slow the vehicle
while driving and reduce brake wear
● Brake hard with the pedal until the wheels lock, then get off the
brakes until the wheels begin to rollagain.. Answer: To use the stab
braking technique during emergency braking, you:
● Reduce the risk of ice in the air brake valves in cold weather. Answer:
If your vehicle has an alcohol evaporator, it's there to:
● Check the alcohol level and fill if necessary. Answer: If your vehicle
is equipped with an alcohol evaporator, every day during the winter you
should:
PREP KIT 2026 BUNDLED PRACTICE
SOLUTION GUIDE
● 3 psi in one minute. Answer: Air loss in a single vehicle (not a
combination unit) should not be more than (. .) with the engine off and
the brakes on.
● 60 psi. Answer: The vehicle must have a warning device which comes
on when the air pressure in the service air tanks falls below:
● The one-way check valve. Answer: If the air system should develop a
leak, what will keep air in the air tanks?
● The service brake system. Answer: Which brake system applies and
releases the brakes when the driver uses the brake pedal?
● Spring pressure. Answer: When using the parking brakes or
emergency brakes, what type of pressure is being used?
● 3 psi in one minute. Answer: The air loss rate for a straight truck or
bus with the engine off and the brakes applied should not be more than:
, ● An air pressure gauge, to show the pressure available for braking.
Answer: Air brake equipped vehicles must have:
● The heavier a vehicle or the faster it is moving, the more heat the
brakes have to absorb to stop it. Answer: Which of the following
statements about brakes is true?
● Emergency brakes. Answer: Three different systems are found on
modern air brake systems; service brakes, parking brakes, and:
● The purpose of engine retarders is to:. Answer: Help slow the vehicle
while driving and reduce brake wear
● Brake hard with the pedal until the wheels lock, then get off the
brakes until the wheels begin to rollagain.. Answer: To use the stab
braking technique during emergency braking, you:
● Reduce the risk of ice in the air brake valves in cold weather. Answer:
If your vehicle has an alcohol evaporator, it's there to:
● Check the alcohol level and fill if necessary. Answer: If your vehicle
is equipped with an alcohol evaporator, every day during the winter you
should:
