CDL - AIR BRAKES PRACTICE TEST
ACCURATE 100%
A low air pressure warning signal should activate - ANSWER When tank pressure falls
below 60 psi.
In an air brake system, a low air pressure warning signal must come on if air pressure in
the tanks falls below 60 psi. This warning signal may come in the form of a light, a
buzzer, or a wig wag.
Why should you regularly drain the air tanks - ANSWER Because compressed air
contains some water and the water collects in the tanks
Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps
to indicate when the ABS is not working. - ANSWER Yellow
A dual air brake system - ANSWER Consists of two separate air brake systems that
share a single set of controls.
A safety valve is set to open at ______ pounds per square inch (psi) - ANSWER 150
Air pressure should build up in a single air system within - ANSWER Three minutes
Some air brake systems use alcohol - ANSWER To reduce the risk of ice forming in air
brake valves
Spring brakes come on - ANSWER When too much air pressure is lost
On trucks and buses, where are ABS malfunction lamps located - ANSWER On the
instrument panel
Before driving a vehicle with a dual air brake system, you must wait for the air
compressor to build a minimum of _______ in both the primary and secondary systems
- ANSWER 100 psi
Anti-Look Braking system (ABS) - ANSWER Are equipped in addition to other braking
systems and do not reduce normal braking power
If using air tanks with manually operated drains, how often should you drain the tanks -
ANSWER Every day
the parking brake should be - ANSWER Used whenever you park your vehicle.
ACCURATE 100%
A low air pressure warning signal should activate - ANSWER When tank pressure falls
below 60 psi.
In an air brake system, a low air pressure warning signal must come on if air pressure in
the tanks falls below 60 psi. This warning signal may come in the form of a light, a
buzzer, or a wig wag.
Why should you regularly drain the air tanks - ANSWER Because compressed air
contains some water and the water collects in the tanks
Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps
to indicate when the ABS is not working. - ANSWER Yellow
A dual air brake system - ANSWER Consists of two separate air brake systems that
share a single set of controls.
A safety valve is set to open at ______ pounds per square inch (psi) - ANSWER 150
Air pressure should build up in a single air system within - ANSWER Three minutes
Some air brake systems use alcohol - ANSWER To reduce the risk of ice forming in air
brake valves
Spring brakes come on - ANSWER When too much air pressure is lost
On trucks and buses, where are ABS malfunction lamps located - ANSWER On the
instrument panel
Before driving a vehicle with a dual air brake system, you must wait for the air
compressor to build a minimum of _______ in both the primary and secondary systems
- ANSWER 100 psi
Anti-Look Braking system (ABS) - ANSWER Are equipped in addition to other braking
systems and do not reduce normal braking power
If using air tanks with manually operated drains, how often should you drain the tanks -
ANSWER Every day
the parking brake should be - ANSWER Used whenever you park your vehicle.
