Air Brakes - Indiana Cdl

1 . Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.

10 psi 25 psi 50 psi 100 psi Click Here Full Cheat Sheet

2 . 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

3 . What does the air compressor governor do?

Controls when the air compressor pumps air into the air storage tanks. Controls how quickly air leaves the air storage tanks. Controls the temperature of the air entering the air storage tanks. Controls the temperature of the air leaving the air storage tanks. Take a FREE Practice Test Now

4 . Brakes can get out of adjustment:

If they are hot. During the winter. If they are used at all. If brakes on one side are used more often than brakes on the other side. Take a FREE Practice Test Now

5 . Service brakes should:

Be tested once a month. Only be tested by a trained mechanic. Be tested before every trip. Click Here Full Cheat Sheet

6 . Which type of brakes do most heavy-duty vehicles have?

Air brakes Solid brakes Liquid brakes Gravity brakes Take a FREE Practice Test Now

7 . What color is the low air pressure warning light?

Green Orange Red Purple Take a FREE Practice Test Now

8 . Brakes may get out of adjustment:

If they are too hot. In colder weather. If they are used. If they get wet. Take a FREE Practice Test Now

9 . If your tractor is equipped with ABS but your trailer is not, the ABS:

Will not be effective. Will still improve your steering control. Will make jackknifing easier. Will allow others to see when you brake. Click Here Full Cheat Sheet

10 . A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.

Green Yellow Orange White Take a FREE Practice Test Now

11 . On newer vehicles, how do you put on the parking brake?

Move a lever to the right. Push in the yellow, diamond-shaped knob. Pull out the yellow, diamond-shaped knob. Pull up on the steering column. Take a FREE Practice Test Now

12 . During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:

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

13 . What happens if brakes become too hot?

They will become too smooth. They will harden. They may stop working. The air compressor will kick in to cool the brakes 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 . The application pressure gauge:

Shows how much air pressure is being applied to the brakes. Shows the temperature of air being used in the braking system. Shows the pressure of the air coming from the compressor. Shows the number of times the brakes have been used. Take a FREE Practice Test Now

15 . Pressing and releasing a brake pedal unnecessarily can:

Release air faster than it can be replaced. Add more air to the braking system. Make the brake pedal more sensitive. Create a loud noise. Take a FREE Practice Test Now

16 . The safety valve located on the first tank opens:

Regularly. If there is too little pressure. If there is too much pressure. After every stop. Take a FREE Practice Test Now

17 . Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:

An extra set of brakes. Voice-activated brakes. Cruise control. Anti-Lock Braking Systems (ABS). Click Here Full Cheat Sheet

18 . When a brake pedal is pressed and the S-cam is turned, the S-cam:

Presses the brake shoes against the inside of the brake drum. Tightens the brake drum onto the axle. Presses the brake lining against the wheel. Releases air from the air tanks. Take a FREE Practice Test Now

19 . Most heavy-duty vehicles use:

Single air brake systems. Dual air brake systems. Triple air brake systems. Quadruple air brake systems. Take a FREE Practice Test Now

20 . If one air system in a dual air brake system is very low on pressure:

None of the brakes will work at all. Either the front or rear brakes will not be operating fully. There will be no noticeable affect. Lights on the outside of the tractor will flash. Take a FREE Practice Test Now

21 . If braking at a speed of 55 mph while driving on dry pavement, the brake lag can add ____ to your vehicle's total stopping distance.

32 feet 15 feet 50 feet 10 feet Click Here Full Cheat Sheet

22 . Foundation brakes are used:

Only at the front wheels. Only at the rear wheels. Only at the driver’s side wheels. At each wheel. Take a FREE Practice Test Now

23 . Failing to drain the tanks in an air brake system can result in:

Water freezing and causing brake failure. Squishy brakes. Too much air collecting. Too much fuel being carried. Take a FREE Practice Test Now

24 . 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. When tank pressure falls below 5 psi. Take a FREE Practice Test Now

25 . Air brakes are:

An effective tool for stopping large vehicles. Prohibited on large vehicles. Only effective in poor weather. A tool to improve fuel efficiency. Click Here Full Cheat Sheet