New Brunswick Commercial Drivers License Air Brakes Practice Test 3

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New Brunswick Air Brakes Practice Test 3

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

1 / 20

What powers the air brakes air compressor system?

The rotation of the wheels

The battery

Overhead wires

The trucks engine

2 / 20

The pushrod stroke occurs when compressed air enters the?

Brake chamber

Air compressor

Engine block

Supply tank

3 / 20

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

Ride the brake pedal all the time

Drive on highways only

Wear a helmet in the cab

Follow other vehicles at a safe distance

4 / 20

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

Mismatched slack adjuster lengths

All of the below

Cracks or other damage

New holes from wear and tear

5 / 20

Which colour usually means the air line is a service line?

Red

Blue

Yellow

Black

6 / 20

Activation of trailer spring brakes can be checked by?

Gunning it

Rocking the truck back and forth

Applying slight engine power

Pulling the trailer air valve

7 / 20

What is the service brake used for?

Emergency braking

Normal braking

None of these

Drifting

8 / 20

The spring brake is designed for which situation?

Skids and emergencies

Parking and emergencies

Skids and parking

Loading skids into the trailer

9 / 20

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

The air compressor

The foundation brake components

The pressure gauge

The air lines

10 / 20

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

Drive at full speed

Inspect them

Tap on them

Pull on them

11 / 20

When brakes become overheated they also become?

Very hot

Extra efficient

Dangerously inefficient

None of the above

12 / 20

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

Slow down but keep driving

Stop safely and immediately

Check it at the nearest garage

Call the police to let them know

13 / 20

Most air brake systems will use automatic valves to?

Increase pressure at the front wheels

Increase pressure at the back wheels

Reduce pressure at the front wheels

Reduce pressure at the back wheels

14 / 20

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

The air valve is operated by the gas pedal

The air valve signals the compressor to turn on

The air valve closes, leaving the brake pressure the same

The air valve opens letting more air into the brakes

15 / 20

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

Release the spring brakes and apply the service brake

Cover the chamber in soapy water

Start the engine

Fill the compressor

16 / 20

You test a tractor protection valve by removing the service line and?

Driving 150 metres

Switching the gears

Engaging the brake pedal

Starting the truck

17 / 20

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

The second air tank

The supply tank

The first air tank

The last air tank

18 / 20

When you are going twice the speed, your brakes will need to work ________ time harder to stop your vehicle.

Two

Five

Three

Four

19 / 20

What function does the alcohol evaporator perform?

Prevents overheating

Prevents the system from building up too much pressure

Prevents freezing

Prevents moisture build ups in the brake lines

20 / 20

Why is it important to know where your air system releases air pressure from?

Because you should know your truck

In case anyone ever asks

So you're not suprised

Because it can be dangerous

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More New Brunswick Commercial Driving Practice Tests

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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.