Air Brakes #2 - Kansas Cdl

1 . The ____ tells a driver how much pressure is in the air tanks.

Application pressure gauge Air compressor governor Supply pressure gauge Drum brake Click Here Full Cheat Sheet

2 . During an applied leakage test, the maximum leakage rate for a double 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

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

4 . The air pressure in a dual air brake system should build from 85 to 100 psi within:

Two minutes. 15 seconds. 10 minutes. 45 seconds. Take a FREE Practice Test Now

5 . Most heavy-duty vehicles use ____ air brake systems.

Single Dual Triple Quad Click Here Full Cheat Sheet

6 . Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when:

Air pressure falls below 45 psi. Air pressure falls below 20 psi. Driving downhill. Driving uphill. Take a FREE Practice Test Now

7 . A tank endorsement is:

Only required when transporting gases. Only required when transporting liquids. Used when transporting both liquids and gases. Optional when transporting hazardous materials. Take a FREE Practice Test Now

8 . 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

9 . 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. Click Here Full Cheat Sheet

10 . Some air brake systems use alcohol:

To reduce the risk of ice forming in air brake valves. To make the compressor run more efficiently. To lubricate parts of the braking system. To reduce the risk of rust forming on air brake valves. Take a FREE Practice Test Now

11 . 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

12 . If the spring brakes are activated, you should never:

Push down the brake pedal. Open the hood. Release air from the air storage tanks. Open the door to the cab. Take a FREE Practice Test Now

13 . When inspecting your brakes, a slack adjuster should move ____ from where it is attached to the push rod.

At least three inches More than two inches Up to five inches No more than one inch 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 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

15 . When traveling down a steep downgrade:

The air brakes should be used. Shift into a lower gear, then use brakes to supplement the braking effect of the engine. The vehicle should be continually downshifted in the place of using the brakes. The vehicle should be driven on the shoulder. Take a FREE Practice Test Now

16 . Friction inside a brake drum is caused when the brake shoes and linings:

Push against each other. Separate from the axle. Push against the inside of the drum. Create excess heat. Take a FREE Practice Test Now

17 . The air entering air storage tanks may contain:

Water and compressor oil. Frost. Gravel. Antifreeze. Click Here Full Cheat Sheet

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

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

19 . 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

20 . Before driving a vehicle with a dual air brake system, you must wait for the air compressor to build a minimum of ____ in both the primary and secondary systems.

25 psi 50 psi 75 psi 100 psi Take a FREE Practice Test Now

21 . Anti-Lock Braking Systems (ABS):

Reduce normal braking capacity. Are equipped in addition to other braking systems and do not reduce normal braking power. Are not effective on larger vehicles. Are illegal in some states. Click Here Full Cheat Sheet

22 . During a walk-around inspection, ensure there are no cracks on the brake drums that are more than ____ of the width of the friction area.

One half One quarter One third One tenth Take a FREE Practice Test Now

23 . What is removed when an air tank is drained?

Water and oil Ammonia Wood Chlorine Take a FREE Practice Test Now

24 . Dollies equipped with ABS are required to have malfunction lamps located where?

On the rear On the left side On the front On the top Take a FREE Practice Test Now

25 . 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