Air Brakes #2 - Delaware Cdl

1 . If the air pressure warning light comes on, you should:

Continue driving normally. Activate your hazard lights and continue driving. Call the local law enforcement agency. Safely exit the roadway and stop. Click Here Full Cheat Sheet

2 . Brake fading is caused when:

Brakes are not used often enough. Brakes overheat. Brakes are too cold. Brakes are wet. Take a FREE Practice Test Now

3 . To confirm that a trailer has ABS, you can:

Look under the trailer for wheel speed sensors coming from the back of the brakes. Look under the hood for the ABS sticker. Look at the tires. Remove a tire and look for the ABS sensor on the axle. Take a FREE Practice Test Now

4 . Truck tractors with air brakes built on or after March 1, 1997 must have:

An Anti-Lock Braking System (ABS). Bluetooth. GPS. A rear back-up camera. Take a FREE Practice Test Now

5 . 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

6 . How many air storage tanks are used in an air brake system?

Two tanks Four tanks Six tanks The number varies. Take a FREE Practice Test Now

7 . A modulating control valve can control the:

Spring brakes. Landing gear. Air brakes. Anti-lock braking system (ABS). Take a FREE Practice Test Now

8 . 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

9 . 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

10 . 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

11 . The air storage tanks:

Hold only enough air for one braking cycle. Hold enough air for brakes to be used several times if the compressor stops working. Do not hold air unless there is an emergency. Hold enough air for more than 1,000 braking cycles. Take a FREE Practice Test Now

12 . 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

13 . 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

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14 . When the brake pedal is pushed down, air brakes work:

Immediately. After a short delay. After about a minute. Only if it is warm outside. Take a FREE Practice Test Now

15 . The service brake system:

Applies and releases the brakes when you press the brake pedal while driving normally. Applies and releases the parking brakes. Applies and releases the emergency brake. Applies and releases the axle brake. Take a FREE Practice Test Now

16 . 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

17 . When you need to stop in an emergency, you should:

Lock the wheels and skid to a stop. Stop in a way that keeps your vehicle in a straight line. Stop in a way that turns your vehicle. Expect your vehicle to slow down more quickly than usual. Click Here Full Cheat Sheet

18 . The brake pedal is part of which braking system?

The service brake system The parking brake system The emergency brake system The auxiliary brake system Take a FREE Practice Test Now

19 . 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

20 . 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

21 . Air tank drains:

Allow rain water to enter the tank. Are used to drain water and compressor oil from the air tank. Should never be opened. Must remain open during transit. Click Here Full Cheat Sheet

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

Green Orange Red Purple Take a FREE Practice Test Now

23 . What do anti-lock brakes do?

Help a driver avoid wheel lockup Lock up the front wheels Prevent a vehicle from accelerating while traveling uphill Prevent a vehicle from accelerating while traveling downhill Take a FREE Practice Test Now

24 . If the safety relief valve in the air brake system releases air:

The compressor needs more air. The air pressure has become too high. The brakes are fully operational. Take a FREE Practice Test Now

25 . 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. Click Here Full Cheat Sheet