Air Brakes - South Dakota Cdl

1 . When the spring brakes are on, you should never:

Turn on the lights. Turn off the vehicle. Push down the brake pedal. Click Here Full Cheat Sheet

2 . The parking brake should be:

Used whenever you park your vehicle. Used while driving. Set when driving in bad weather. Removed. Take a FREE Practice Test Now

3 . Alcohol evaporators are:

Illegal. Used to add alcohol to braking systems to prevent items from freezing. Only allowed on vehicles carrying hazardous materials. Take a FREE Practice Test Now

4 . 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

5 . Lights that indicate that anti-lock brakes are not working are:

Gray. Blue. Yellow. Click Here Full Cheat Sheet

6 . 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. Take a FREE Practice Test Now

7 . Before starting down a hill, be sure to:

Accelerate. Switch into a high gear. Sound your horn. Switch into a low gear. Take a FREE Practice Test Now

8 . 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

9 . If the brake pads rub against the brake drums and create too much heat:

The brakes will stick. The brakes will become extra sensitive. The brakes may stop working. The air compressor will kick on to cool the brakes. Click Here Full Cheat Sheet

10 . How is the parking brake released?

By tapping the brake pedal three times By pushing in the brake control knob By starting the vehicle By tapping the accelerator twice Take a FREE Practice Test Now

11 . During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:

10 psi in a minute. 8 psi in a minute. 6 psi in a minute. 4 psi in a minute. Take a FREE Practice Test Now

12 . 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

13 . The leakage rate for a triple combination vehicle with air brakes should be no more than ____ in one minute during a static leakage test.

8 psi 5 psi 3 psi 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 . 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

15 . If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. In what condition should the belt be?

Loose Tight Cracked Bumpy Take a FREE Practice Test Now

16 . 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

17 . 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

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

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

19 . The air compressor governor controls:

When the air compressor pumps air into the air storage tanks. How fast air is pumped into the air storage tanks. The temperature of air pumped into the air storage tanks. The speed of the vehicle. Take a FREE Practice Test Now

20 . Both systems in a dual air brake systems share:

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

21 . The parking brake should be:

Used whenever you park the vehicle. Used while driving. Set when driving in bad weather. Used to stop the vehicle in normal driving. Click Here Full Cheat Sheet

22 . What kind of force must emergency brakes use?

Air pressure Mechanical Heavy Electrical Take a FREE Practice Test Now

23 . Vehicles with dual air brake systems:

Maintain full-capacity air pressure in the braking systems even when the vehicle is not running. Maintain some air pressure in the braking systems when the vehicle is not running. Must be run to build enough air pressure to brakes to operate properly. Do not need time to build air pressure before a trip. Take a FREE Practice Test Now

24 . Air tank drains:

Allow rain water to enter the tanks. Are used to drain water and oil from the tanks. Should never be opened. Must remain open while driving. Take a FREE Practice Test Now

25 . An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:

125 psi. 100 psi. 150 psi. 80 psi. Click Here Full Cheat Sheet