Friction inside a brake drum is caused when the brake shoes and linings push against the inside of the drum. The friction in the drums will slow and stop the vehicle.

Press against the inside of the brake drum.

Press against the outside of the brake drum.

Press against the inside of the brake drum.

If equipped, ABS is in addition to a vehicle's normal braking system and does not increase or decrease the braking power of any other system. ABS only activates when a vehicle's wheels are about to lock.

Are in addition to other braking systems and do not reduce a vehicle's braking power.

Reduce a vehicle's normal braking capacity.

Are in addition to other braking systems and do not reduce a vehicle's braking power.

Are not effective on larger vehicles.

If the low pressure warning signal activates while you are driving, it is important that you safely exit the roadway as soon as possible and park your vehicle. If the air pressure gets too low, the brakes will no longer work well enough for you to stop safely.

Exit the roadway as soon as safely possible

A dual air brake system is made up of two separate air brake systems. The systems share a single set of brake controls, but each has its own air tanks, hoses, and lines. One system typically operates the regular brakes on the rear axle or axles while the other system operates the regular brakes on the front axle.

Consists of two separate air brake systems that share a single set of controls.

Is a single air brake system with two different sets of controls.

Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls.

Air Brakes Endorsement Test | Alaska 2024 #2 Page 3 of 4

Train for FREE online with our Alaska CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a AK Class A/Class B driver license in 2024, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.

Number of Question 25

Passing Score 20

Number of Tests 20

Air Brakes Endorsement Test | Alaska 2024 #2 Page 3 of 4

13 . Friction in an S-cam brake is caused when the brake shoes and linings:

14 . Anti-Lock Braking Systems (ABS):

15 . You should ____ if the low pressure warning signal activates while you are driving.

16 . What is often found in compressed air?

17 . Using an Anti-Lock Braking System (ABS):

18 . A dual air brake system:

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