Maine CDL Air Brakes Test (2023) - FREE CDL Practice Test

1. If a load is placed on one side of the trailer:

a rollover is more likely.
the steering axle weight will be too light to steer safely.
making turns may be easier.

2. A low air pressure warning signal:

is required on all vehicles without air brakes.
is optional on vehicles with air brakes.
is required on vehicles with air brakes.

3. In vehicles with air brakes, the air compressor governor:

controls how much air the air compressor will pump into the air storage tanks.
controls when the air compressor will pump air into the air storage tanks.
controls when the air storage tanks will pump air into the air compressor.

4. When driving in a construction zone, if a construction worker is near the road, you should:

further reduce your speed.
come to a complete stop.
maintain a constant speed.

5. If air doesn't flow all the way to the back:

a rollover is more likely.
your brakes will not work properly.
the trailer will tend to swing around.

6. Which of the following is a reason why air tanks must be drained?

Your brakes may fail due to the water freezing.
Your battery fluid may drain out.
The governor may stop the compressor from pumping air.

7. Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.

150 psi
50 psi
100 psi

8. Pressing and releasing the brake pedal unnecessarily can:

causes friction, which slows the vehicle.
let air out faster than the compressor can replace it.
apply more air pressure.

9. The air compressor is connected to:

the radiator.
the engine.
the transmission.

10. If your vehicle is hydroplaning, you should:

release the accelerator and push in the clutch.
use the brakes to slow down.
accelerate to get through the water as quickly as possible.

Number of questions:	25
Correct answers to pass:	20
Passing score:	80%

CDL AIR BRAKES PRACTICE TEST - MAINE

ME CDL Air Brakes Test