Air Brakes CDL Test - FREE Oklahoma CDL Practice Test

1. At 55 mph, the total stopping distance for vehicles with air brake systems traveling in ideal conditions is:

2. With a dual air brake system:

each system has its own air tanks, hoses and lines.
each system shares the same lines and hoses.
each system shares air tanks.

3. In a vehicle with a dual air brake system:

one system supplies air to the trailer.
each system has its own air tanks.
both systems typically operate the regular brakes on the rear axle.

4. If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.

5. When driving at night, you should:

drive slowly enough to see obstacles with your headlights.
look directly at the lights of oncoming vehicles.
put your own high beams on if other drivers don't put their low beams on.

6. If the low air pressure warning light comes on, you should:

7. Spring brakes are usually held back by:

8. Which of the following is not part of the air brake system?

9. When you use your mirrors while driving on the road, you should:

avoid checking them regularly.
only use the driver's side mirror.
check them quickly.

10. The ________ brake system applies and releases the brakes when the driver uses the brake pedal during normal driving.

OK CDL AIR BRAKES PRACTICE TEST