Air Brakes - Maine Cdl

1 . If the spring brakes are on, you should:

Not use the brake pedal. Press the accelerator. Move the steering wheel. Click Here Full Cheat Sheet

2 . 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. Take a FREE Practice Test Now

3 . What tells you how much pressure is in your vehicle's air tanks?

The supply pressure gauge The ABS malfunction lamp The tractor protection valve Take a FREE Practice Test Now

4 . Braking mechanisms are located inside:

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

5 . What kind of force do emergency brakes use?

Air pressure Mechanical Heavy Click Here Full Cheat Sheet

6 . Why should you regularly drain the air tanks?

Because the air gets old and needs to be replaced Because compressed air contains some water and the water collects in the tanks To allow for a change in pressure Take a FREE Practice Test Now

7 . Air pressure should build up in a single air system within:

15 minutes. 12 minutes. Three minutes. Take a FREE Practice Test Now

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

Thin. Properly tightened. Cracked. Take a FREE Practice Test Now

9 . Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:

Stop the compressor from pumping air. Release air from the tanks. Begin pumping air into the tanks. Click Here Full Cheat Sheet

10 . During an inspection, slack adjusters on S-cam brakes should not move more than:

One foot. One centimeter. One inch. Take a FREE Practice Test Now

11 . 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. Take a FREE Practice Test Now

12 . Brake linings should be:

Loose. Free of oil. Soft. Take a FREE Practice Test Now

13 . In a dual air brake system, if one air system is very low on pressure:

None of the brakes will work at all. Either the front or rear brakes will not be fully operable. There is usually no noticeable effect. Click Here Full Cheat Sheet

Study tip: Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet” 99.2% of people who use the cheat sheet pass the FIRST TIME Click Here Full Cheat Sheet

14 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is ____ in a minute.

2 psi 4 psi 6 psi Take a FREE Practice Test Now

15 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:

Set the control to normal. Set the control to the off position. Set the control to the neutral position. Take a FREE Practice Test Now

16 . 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

17 . What is often found in compressed air?

Water Cardboard Brake fluid Click Here Full Cheat Sheet

18 . ABS brakes:

Help you avoid wheel lockup. Lock up your vehicle's wheels. Prevent your vehicle from accelerating when going uphill. Take a FREE Practice Test Now

19 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi. When tank pressure falls below 60 psi. When tank pressure falls below 10 psi. Take a FREE Practice Test Now

20 . The air compressor is connected to the:

Transmission. Engine. Radiator. Take a FREE Practice Test Now

21 . When parking, you should not use the parking brake if:

The brakes are very hot. The brakes are very cold. There is snow on the ground. Click Here Full Cheat Sheet

22 . An application pressure gauge shows:

How much air pressure is being applied to the brakes. How much air pressure is available. How much air pressure is required to stop a vehicle. Take a FREE Practice Test Now

23 . What do the two systems of a dual air brake system share?

Hoses An air compressor Air tanks Take a FREE Practice Test Now

24 . 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

25 . While driving, ____ generally holds spring brakes in place.

Air pressure Electricity Gasoline Click Here Full Cheat Sheet