Air Brakes - Kentucky Cdl

1 . An alcohol evaporator is especially important:

In cold weather. In hot weather. In dry weather. Click Here Full Cheat Sheet

2 . A safety valve is set to open at ____ pounds per square inch (psi).

100 150 200 Take a FREE Practice Test Now

3 . What is often found in compressed air?

Water Cardboard Brake fluid Take a FREE Practice Test Now

4 . 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

5 . Brakes can get out of adjustment quickly, especially:

If they are hot. In the winter time. If they are used frequently. Click Here Full Cheat Sheet

6 . A driver can rely on front wheel braking to work:

On dry roadways only. Under all conditions. Under all conditions, except for snow. Take a FREE Practice Test Now

7 . 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

8 . When operating a vehicle with a dual air brake system, the driver should:

Let the vehicle warm up before driving to ensure that the fuel reaches the engine. Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving. Begin driving just after the vehicle starts. Take a FREE Practice Test Now

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

Green Blue Yellow Click Here Full Cheat Sheet

10 . Do not operate a vehicle if any brake drums have cracks that are larger than ____ of the width of the friction area.

One half One third One fifth Take a FREE Practice Test Now

11 . If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:

Test the brakes while driving, but continue driving if nothing seems wrong. Immediately stop driving. Drive with the hazard lights activated. Take a FREE Practice Test Now

12 . If the safety relief valve in an air brake system is releasing air:

You should not be concerned as this is a normal process. There is something wrong with the brakes. The valve is operational. Take a FREE Practice Test Now

13 . Alcohol evaporators are:

Illegal. Used to add alcohol to braking systems to prevent items from freezing. Only allowed on vehicles carrying hazardous materials. 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 . While operating on a downgrade, you should brake until you reach a speed that is:

5 mph below your safe speed. 10 mph below your safe speed. 15 mph below your safe speed. Take a FREE Practice Test Now

15 . Air brakes use ____ to function.

Compressed air Liquid nitrogen Carbon dioxide Take a FREE Practice Test Now

16 . An Anti-Lock Braking System (ABS):

Is not available for vehicles with air brakes. Is not helpful in most driving situations. Can help you maintain control when braking. 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 . In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.

25 10 45 Take a FREE Practice Test Now

19 . Failing to drain air tanks could result in:

Water accumulations freezing and causing brake failure. Squishy brakes. Too much air collecting in the tanks. Take a FREE Practice Test Now

20 . 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

21 . 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

22 . When you are about to start down a hill, you should switch into a ____ gear.

Higher Faster Lower Take a FREE Practice Test Now

23 . ____ make up the emergency brake system.

Only parts of the parking brake system Only parts of the service brake system Parts of the parking and service brake systems Take a FREE Practice Test Now

24 . How much distance will an air brake-equipped vehicle need to come to a complete stop if it is traveling at 55 mph under ideal driving conditions?

300 feet 100 feet 450 feet Take a FREE Practice Test Now

25 . The rods in S-cam brakes move the slack adjusters when air pressure is added to the brake chambers. This air pressure is added to the chambers when the driver:

Presses the brake pedal. Uses the emergency brake. Uses the trailer hand valve. Click Here Full Cheat Sheet