Air Brakes - Vermont Cdl

1 . If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:

Thin. Properly tightened. Cracked. Click Here Full Cheat Sheet

2 . During an applied leakage test, what is the maximum leakage rate that is safe for a single vehicle with air brakes?

10 psi in one minute 5 psi in one minute 3 psi in one minute Take a FREE Practice Test Now

3 . Air tank drains:

Should not be used in cold weather. Are helpful to remove water and oil from the air tanks. Are used to move air to the brakes. Take a FREE Practice Test Now

4 . What is removed when an air tank is drained?

Water and oil Ammonia Liquid cleaners Take a FREE Practice Test Now

5 . What kind of brakes do most newer heavy-duty trucks use?

Single air brakes Dual air brakes Triple air brakes Click Here Full Cheat Sheet

6 . To affect a vehicle, ABS:

Must be on all axles. Must be on the rear axle. Can be on as few as one axle. Take a FREE Practice Test Now

7 . Brakes out of adjustment will:

Work properly. Cause some of the brakes to overwork and malfunction. Allow better acceleration. Take a FREE Practice Test Now

8 . Braking mechanisms are located inside:

The fifth wheel. A brake drum. The landing gear. Take a FREE Practice Test Now

9 . Anti-Lock Braking Systems (ABS):

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. Click Here Full Cheat Sheet

10 . When leaving your vehicle unattended:

The parking brake should be used. The parking brake only needs to be used if the vehicle is parked on a slope. The parking brake should not be used, as it can damage the tires. Take a FREE Practice Test Now

11 . What color malfunction lamps do vehicles equipped with ABS have?

Green Yellow Blue Take a FREE Practice Test Now

12 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.

Slack adjuster One-way check valve Tractor protection valve Take a FREE Practice Test Now

13 . Brake fade is a result of:

Brakes being exposed to sunlight. Brakes being exposed to moisture. Excessive use of the brakes. Click Here Full Cheat Sheet

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14 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi. When tank pressure falls below 55 psi. When tank pressure falls below 10 psi. Take a FREE Practice Test Now

15 . An alcohol evaporator is especially important:

In cold weather. In hot weather. In dry weather. Take a FREE Practice Test Now

16 . In a vehicle with dual air brakes, a leak in one system ____ the second system.

Will always affect May not affect Is caused by Take a FREE Practice Test Now

17 . What does the air compressor governor do?

It stops the compressor from pumping air. It turns on the air compressor. It stores the compressed air. Click Here Full Cheat Sheet

18 . What is often found in compressed air?

Water Cardboard Brake fluid Take a FREE Practice Test Now

19 . In a vehicle with dual parking control valves, a separate air tank can be used:

To make the air brakes work more effectively. To temporarily release the spring brakes. To charge the brakes on the rear trailer. Take a FREE Practice Test Now

20 . What color light indicates a vehicle's ABS is not working?

Green Blue Yellow Take a FREE Practice Test Now

21 . The parking brake in a newer vehicle is applied by:

Moving a lever to the right. Pushing a yellow, diamond-shaped knob. Pulling a yellow, diamond-shaped knob. Click Here Full Cheat Sheet

22 . What can happen if the air pressure gets too low in an air brake system?

The brakes may squeak. The brakes may stop working. The brakes may be sluggish. Take a FREE Practice Test Now

23 . What should happen before the air pressure in an air brake system tank falls below 55 psi?

The warning light should activate. The vehicle will be unable to shift out of gear. The front lights should flash. Take a FREE Practice Test Now

24 . Having ABS on only one axle:

Can be dangerous. Still allows you additional control when braking. Slows the vehicle, but cannot stop it. Take a FREE Practice Test Now

25 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?

3 psi in one minute. 6 psi in one minute. 8 psi in one minute. Click Here Full Cheat Sheet