Air Brakes Test Tennessee (2024) - FREE CDL Practice Test

1. When coupling, you should:

make sure the sliding fifth-wheel is locked.
make sure the trailer wheels are not chocked.
make sure the trailer kingpin is bent.
be aware that wrong coupling and uncoupling can be very dangerous.

2. When driving on slippery roads, you should NOT:

watch far enough ahead to keep a steady speed.
go slowly.
try to anticipate stops early.
use the engine brake.

3. When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.

4. How can you tell if your vehicle is equipped with ABS (anti-lock braking system)?

Trucks, buses, trailers, and converter dollies built after 1998 are required to have ABS.
ABS is required on all vehicles manufactured on or after 2000.
There is no way to tell, ABS is still optional on all vehicle types.
ABS is required on all vehicles manufactured on or after 2005.

5. Brake fade results from, and is affected by:

excessive heat caused by using the brakes too much.
brakes out of adjustment.
excessive heat caused by not relying on the engine braking effect.
All of the above.

6. Your truck has a dual air system. If either system is very low on pressure:

the low pressure warning signal will stop working.
the tractor protection valve will not work properly.
the ABS will not work properly.
either the front or the rear brake will not be fully operational.

7. A passive railroad crossing is one that:

has a traffic control device installed at the crossing to regulate traffic.
has at least two traffic control devices installed at the crossing to regulate traffic.
does not have any type of traffic control device.
requires you to stop and wait until the traffic control device installed at the crossing tells you to proceed.

8. To control your speed on a downgrade, you should:

9. In newer vehicles with air brakes, you put on the parking brake:

using a P-shaped, yellow control knob.
using a diamond-shaped, yellow, push-pull control knob.
moving the orange push-pull lever to the right.
placing the transmission in Park.

10. The braking power of the spring brakes:

depends on the brakes being in adjustment.
is not affected by the air pressure level.
is not affected by the condition of the service brakes.
All of the above.

AIR BRAKES CDL PRACTICE TEST - TENNESSEE