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

1. To check the slack adjusters:

park downhill and see if the vehicle rolls.
Park on level ground and chock the wheels, release the parking brakes and pull hard on each slack adjuster. The slack adjuster shouldn't move more than one inch.
check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
None of the above.

2. With brake drums, if brakes become too hot:

the brakes will supply too much power to the drive wheels.
the brakes may stop working.
the air compressor will kick on to cool the brakes.
your ABS will malfunction.

3. Which of the following is TRUE about dual air brake systems?

Each brake system has its own air tanks, hoses and lines.
most heavy-duty vehicles use dual air brake systems.
A dual air brake system has 2 separate air brake systems.
All of the above.

4. A low air pressure warning signal:

is required on vehicles with air brakes.
is optional on vehicles with air brakes.
is required on all vehicles without air brakes.
None of the above.

5. The use of brakes on a steep downgrade is:

much more effective than the engine braking effect.
the main braking factor.
a supplement to the braking effect of the engine.
dangerous, and should be avoided at all costs.

6. In air brake vehicles, the parking brake should be used:

any time you park (with a few exceptions).
when the spring brakes are on.
as little as possible.
to hold your speed while going downhill.

7. In vehicles with air brakes, the brake pedal:

controls the air pressure applied to the brakes.
let the air out of the spring brakes.
tells you how much pressure is in the air tanks.
pumps air into the air storage tanks.

8. The air compressor stops pumping air into the air storage tanks when air tank pressure rises to around:

9. If the air tanks are not drained:

the water can freeze in cold weather and cause brake failure.
your speed must be reduced to 5 MPH below your “safe” speed.
the spring brakes will come on.
the air pressure in the tanks is reduced.

10. Parking brakes are:

not required on buses.
not required on commercial vehicles with air brakes.
required on all vehicles.
not required on trailers.

AIR BRAKES PRACTICE TEST - NEVADA