New Brunswick Commercial Drivers License Air Brakes Practice Test 4

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New Brunswick Air Brakes Practice Test 4

A 20 question practice test to help prepare you for your air brakes knowledge test in New Brunswick

1 / 20

The best way to reduce rough and abrupt braking is to?

Wear a helmet in the cab

Ride the brake pedal all the time

Drive on highways only

Follow other vehicles at a safe distance

2 / 20

What function does the alcohol evaporator perform?

Prevents freezing

Prevents the system from building up too much pressure

Prevents moisture build ups in the brake lines

Prevents overheating

3 / 20

To make sure the air tanks are securely attached to the vehicle you should?

Pull on them

Inspect them

Drive at full speed

Tap on them

4 / 20

Before inspecting for air brake chamber leaks, you must __________.

Cover the chamber in soapy water

Start the engine

Release the spring brakes and apply the service brake

Fill the compressor

5 / 20

How do you engage the emergency / parking brake on most air brake systems?

Pull out the control

Twist it to the left

Twist it to the right

Press down the pedal

6 / 20

What is the best way to inspect an air compressor?

With the engine on and in high gear

With the engine off

With the engine on in neutral

With the engine on in first gear

7 / 20

Where is the brake lining fastened?

The struts

The rim of the tire

The brake shoe

The wheel well

8 / 20

Activation of trailer spring brakes can be checked by?

Pulling the trailer air valve

Rocking the truck back and forth

Applying slight engine power

Gunning it

9 / 20

What might happen if the air lines are cross connected?

The towing vehicle will lose air

Any of these

The spring brakes won't work

The service brakes will not function correctly

10 / 20

If brake chambers on opposite side of an axle are different sizes, this may cause?

Unbalanced weight

More power than necessary

Unbalanced braking

Efficient stopping

11 / 20

What happens to the air valve when you press down the brake?

The air valve signals the compressor to turn on

The air valve is operated by the gas pedal

The air valve closes, leaving the brake pressure the same

The air valve opens letting more air into the brakes

12 / 20

What powers the air brakes air compressor system?

The battery

The trucks engine

The rotation of the wheels

Overhead wires

13 / 20

Who can perform adjustments and maintenance on your air brake system?

You can if you are the owner

Anyone

Your employer

Only certified technicians

14 / 20

The spring brake is designed for which situation?

Skids and parking

Parking and emergencies

Loading skids into the trailer

Skids and emergencies

15 / 20

What is the first thing to look at when inspecting an air brake system?

The pressure gauge

The foundation brake components

The air compressor

The air lines

16 / 20

When can you adjust your own air brakes?

If you are certified or trained

If it is an emergency

When you are on the road

Never

17 / 20

Which tank should be drained first when draining the air tanks on an air brake system?

The second air tank

The first air tank

The last air tank

The supply tank

18 / 20

What is the most frequent reason a vehicle is removed from service?

Over weight limits

Air brakes

Sleepy drivers

Tire treads

19 / 20

What should you do when the air brakes low pressure warning comes on?

Call the police to let them know

Check it at the nearest garage

Slow down but keep driving

Stop safely and immediately

20 / 20

You should be looking for this when checking your brake chambers?

Cracks or other damage

Mismatched slack adjuster lengths

All of the below

New holes from wear and tear

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More New Brunswick Commercial Driving Practice Tests

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New Brunswick Class 3 Practice Tests

New Brunswick Class 4 Practice Tests

Air Brakes Practice Tests

New Brunswick Road Signs Test

We do our best to keep the questions current and accurate. The testing centres may change the questions on the knowledge tests at any time. Always be prepared for surprises.

Many of the answers to the questions can be found in the driver hand books or learning materials your province provides.

DISCLAIMER:CDHQ is not affiliated with the provinces or any test centres. These practice tests should not be considered official tests and you are not granted a license for completing them. Our tests are simply a practice tool to help prepare yourself for the real test.