CDL Air Brake Practice Test EXAM QUESTIONS
WITH COMPLETE SOLUTION) (MULTIPLE
CHOICES) (A+ GRADED 100% VERIFIED) LATEST
VERSION 2025
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Terms in this set (32)
The parking or emergency b. Spring pressure
brake on a heavy vehicle
can only be held in
position by something that
cannot leak away, like:
a. Fluid pressure
b. Spring pressure
c. Air pressure
d. Any of the above
A straight truck or bus air c. 3
brake system should not
leak at a rate of more than
__ psi per minute with the
engine off and the brake
released.
a. 1
b. 2
c. 3
d. 4
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, 6/8/25, 11:29 AM CDL Air Brake Practice Test EXAM QUESTIONS WITH COMPLETE SOLUTION) (MULTIPLE CHOICES) (A+ GRADED 100% VER…
Your vehicle has dual air a. Bring the vehicle to a safe stop and continue only
brake system. If low air when the system is fixed.
pressure warning comes
on for the secondary
system or for one system,
you should:
a. Bring the vehicle to a
safe stop and continue
only when the system is
fixed.
b. Reduce your speed,
and test the remaining
system while under-way.
c. Reduce your speed, and
drive to the nearest
garage for repairs.
d. Continue at normal
speed if only the
secondary system fails.
If your vehicle has an d. Reduce the risk of ice in the air brake valves in cold
alcohol evaporator, it is weather.
there to:
a. Rid the wet tank of
alcohol that condenses
and sits at the bottom.
b. Eliminate the need for
daily tank draining.
c. Boost tank pressure the
same way that
superchargers boost
engines.
d. Reduce the risk of ice in
the air brake valves in cold
weather.
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