Air Brakes #2 - California Cdl

1 . A wig wag is:

A low pressure warning device. A tube that carries air to the brakes. A type of air brake system. Click Here Full Cheat Sheet

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

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

3 . During a static leakage test, the maximum leakage rate for a double combination vehicle is:

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

4 . The parking brake in a newer vehicle is applied by:

Moving a lever to the right. Pushing a yellow, diamond-shaped knob. Pulling a yellow, diamond-shaped knob. Take a FREE Practice Test Now

5 . 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

6 . Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.

Green Blue Yellow Take a FREE Practice Test Now

7 . 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. Take a FREE Practice Test Now

8 . During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.

3 psi 5 psi 7 psi Take a FREE Practice Test Now

9 . In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.

25 10 45 Click Here Full Cheat Sheet

10 . If the spring brakes are on, you should:

Not use the brake pedal. Press the accelerator. Move the steering wheel. Take a FREE Practice Test Now

11 . A dual air brake system:

Consists of two separate air brake systems that share a single set of controls. Is a single air brake system with two different sets of controls. Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls. Take a FREE Practice Test Now

12 . Having ABS on only one axle:

Can be dangerous. Still allows you additional control when braking. Slows the vehicle, but cannot stop it. Take a FREE Practice Test Now

13 . ____ 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 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 . 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

15 . What must be on all air tanks with air-braked vehicles?

A check valve A lock A trap door Take a FREE Practice Test Now

16 . During an inspection, slack adjusters on S-cam brakes should not move more than:

One foot. One centimeter. One inch. Take a FREE Practice Test Now

17 . A slack adjuster should move no more than ____ from where it is attached to the push rod.

Two inches Five inches One inch Click Here Full Cheat Sheet

18 . 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

19 . In cold weather, an alcohol evaporator should be checked and filled:

Once a week. Every day. Every hour. Take a FREE Practice Test Now

20 . Front wheel braking works:

Only on packed snow. Under all conditions. Only if the road is dry. Take a FREE Practice Test Now

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

On dry roadways only. Under all conditions. Under all conditions, except for snow. Click Here Full Cheat Sheet

22 . How should you test the low pressure warning signal?

Engage and disable the parking brake. Rapidly press and release the brake pedal. Open the rear shut-off valves. Take a FREE Practice Test Now

23 . 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. Take a FREE Practice Test Now

24 . The air storage tanks:

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

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

1 psi 2 psi 3 psi Click Here Full Cheat Sheet