TEXAS CDL AIR BRAKES EXAM, PRACTICE EXAM AND
STUDY GUIDE NEWEST 2024 ACTUAL EXAM 150
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
(VERIFIED ANSWERS) |ALREADY GRADED A
How should you check that the spring brakes come on when the air pressure in the system
drops below a certain level? - ANSWER-Park on level ground, chock the wheels, release the
parking brake when you have enough air pressure, shut the engine off, and repeatedly press and
release the brake pedal.
For air brake systems in good condition, the air compressor should start pumping at about
_____ psi. - ANSWER-100
In air brake vehicles, the parking brake should be used: - ANSWER-Any time the vehicle is
parked.
The most important thing to do when low air pressure warning comes on is: - ANSWER-Stop
and safely park as soon as possible.
If your vehicle has an alcohol evaporator, everyday during cold weather you should: -
ANSWERCheck and fill the alcohol level.
Your bus or truck has a dual air brake system. If a low air pressure warning comes on for only
one system, what should you do? - ANSWER-Stop and safely park. Continue only after the
system is fixed.
It is not safe to drive a vehicle that has brake drums(or discs) with cracks or that are thinner
than the manufacturer's specifications, generally this will be _________ an inch. - ANSWER-
1/2
,Emergency controlled braking is when you: - ANSWER-Apply the brakes as hard as you can
without locking the wheels.
When performing you air brake leak down test your engine should be turned off. - ANSWER-
True
Before driving a truck or bus with a dual air brake system, the pressure in each system should be
at least - ANSWER-100 psi
All air brake equipped vehicles have - ANSWER-A supply pressure gauge
When the brakes are applied the brake shoes (or linings) are pressed against the - ANSWER-
Brake drum or disc
How should you check that your service brakes are working properly? - ANSWER-Park on
level ground, wait for normal air pressure, release the parking brake, move the truck forward
slowly (about 5 mph) and apply the brakes firmly using the brake pedal
To test air service brakes, you should - ANSWER-Brake firmly when slowly moving forwards
The modulating control valve allows you to control the - ANSWER-Spring brakes
When is it okay to leave your truck unattended without applying the parking brake or chocking
the wheels? - ANSWER-Never
The driver must be able to see a warning before air pressure in the service air tanks falls below -
ANSWER-60 psi
, An air brake system is fully charged at - ANSWER-125 psi
If the spring brakes are on, when should - ANSWER-Never
How should you check that the spring brakes come on when air pressure in the system drops
below a certain level? - ANSWER-Park on level ground, chock the wheels, engage the park
brake when you have the correct amount of air pressure to do so, and shut the engine off
The brake pedal in an air brake system - ANSWER-Controls the air pressure applied to put on
the brakes
If the spring brakes are on, when should you push the brake pedal? - ANSWER-Never
Emergency controlled braking is when you - ANSWER-Apply the brakes as hard as you can
without locking the wheels
If your truck's air compressor has its own oil supply, when should you first check the oil level? -
ANSWER-Before driving
The parking or emergency brakes on a heavy vehicle can only be held in position by something
that cannot lead away, like - ANSWER-Spring pressure
If your truck has a dual air system and one of the systems is low on pressure - ANSWER-
Either the front or rear brakes will not be fully operational
The stop light switch - ANSWER-Turns on the brake lights to ward drivers behind you
STUDY GUIDE NEWEST 2024 ACTUAL EXAM 150
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
(VERIFIED ANSWERS) |ALREADY GRADED A
How should you check that the spring brakes come on when the air pressure in the system
drops below a certain level? - ANSWER-Park on level ground, chock the wheels, release the
parking brake when you have enough air pressure, shut the engine off, and repeatedly press and
release the brake pedal.
For air brake systems in good condition, the air compressor should start pumping at about
_____ psi. - ANSWER-100
In air brake vehicles, the parking brake should be used: - ANSWER-Any time the vehicle is
parked.
The most important thing to do when low air pressure warning comes on is: - ANSWER-Stop
and safely park as soon as possible.
If your vehicle has an alcohol evaporator, everyday during cold weather you should: -
ANSWERCheck and fill the alcohol level.
Your bus or truck has a dual air brake system. If a low air pressure warning comes on for only
one system, what should you do? - ANSWER-Stop and safely park. Continue only after the
system is fixed.
It is not safe to drive a vehicle that has brake drums(or discs) with cracks or that are thinner
than the manufacturer's specifications, generally this will be _________ an inch. - ANSWER-
1/2
,Emergency controlled braking is when you: - ANSWER-Apply the brakes as hard as you can
without locking the wheels.
When performing you air brake leak down test your engine should be turned off. - ANSWER-
True
Before driving a truck or bus with a dual air brake system, the pressure in each system should be
at least - ANSWER-100 psi
All air brake equipped vehicles have - ANSWER-A supply pressure gauge
When the brakes are applied the brake shoes (or linings) are pressed against the - ANSWER-
Brake drum or disc
How should you check that your service brakes are working properly? - ANSWER-Park on
level ground, wait for normal air pressure, release the parking brake, move the truck forward
slowly (about 5 mph) and apply the brakes firmly using the brake pedal
To test air service brakes, you should - ANSWER-Brake firmly when slowly moving forwards
The modulating control valve allows you to control the - ANSWER-Spring brakes
When is it okay to leave your truck unattended without applying the parking brake or chocking
the wheels? - ANSWER-Never
The driver must be able to see a warning before air pressure in the service air tanks falls below -
ANSWER-60 psi
, An air brake system is fully charged at - ANSWER-125 psi
If the spring brakes are on, when should - ANSWER-Never
How should you check that the spring brakes come on when air pressure in the system drops
below a certain level? - ANSWER-Park on level ground, chock the wheels, engage the park
brake when you have the correct amount of air pressure to do so, and shut the engine off
The brake pedal in an air brake system - ANSWER-Controls the air pressure applied to put on
the brakes
If the spring brakes are on, when should you push the brake pedal? - ANSWER-Never
Emergency controlled braking is when you - ANSWER-Apply the brakes as hard as you can
without locking the wheels
If your truck's air compressor has its own oil supply, when should you first check the oil level? -
ANSWER-Before driving
The parking or emergency brakes on a heavy vehicle can only be held in position by something
that cannot lead away, like - ANSWER-Spring pressure
If your truck has a dual air system and one of the systems is low on pressure - ANSWER-
Either the front or rear brakes will not be fully operational
The stop light switch - ANSWER-Turns on the brake lights to ward drivers behind you
