Nova Scotia Commercial Drivers License Air Brakes Practice Test 4

Commercial Driver HQ is a website focused on helping new commercial drivers in all provinces and territories in Canada.

Our FREE practice tests are designed to help you succeed when it comes time to write the real test.

Each license type has 5 tests to help you study and become familiar with the rules and regulations of commercial driving. The tests are not identical to the license test you will need to pass, but the questions are similar to what you will find on the real deal.

Compatible on desktop, mobile, and tablet, you can take these tests anywhere you have internet access.

Take the practice test!

Created by

Commercial Driver HQ

Nova Scotia Air Brakes Practice Test 4

A 20 question practice test to help prepare you for your air brakes knowledge test in Nova Scotia

1 / 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

2 / 20

Finding a small bit of oil during an inspection is no cause for concern if its coming from the _____________?

Wheel bearings

Supply tank

The second tank

The first tank

3 / 20

Which can contaminate a brake systems air lines?

Dirt

Grease and oil

Dust

Water and salt

4 / 20

When inspecting an air brake system, the person inspecting should wear?

Sandals and shorts

Steel toe boots, safety glasses, hard hats

Dust mask, safety glasses

Shorts and Crocs

5 / 20

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

Follow other vehicles at a safe distance

Wear a helmet in the cab

Drive on highways only

Ride the brake pedal all the time

6 / 20

What function does the alcohol evaporator perform?

Prevents moisture build ups in the brake lines

Prevents overheating

Prevents the system from building up too much pressure

Prevents freezing

7 / 20

Which statement is true of spring brakes?

They are stronger than service brakes

They can be used in lieu of service brakes

They are not as strong as service brakes

They are as strong as service brakes

8 / 20

Where is the air pressure gauge for the air brake system?

On each wheels brake

Beside the air compressor

On the vehicle dashboard

Beside the supply tank

9 / 20

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

The supply tank

The first air tank

The second air tank

The last air tank

10 / 20

Manufactures recommend draining moisture and oil in an air system on a _______ basis.

Daily

Weekly

Monthly

Quarterly

11 / 20

How much air loss is allowed for a tractor and a trailer when the brakes are engaged?

32 kPa/minute

26 kPa/minute

28 kPa/minute

34 kPa/minute

12 / 20

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

Twist it to the right

Pull out the control

Press down the pedal

Twist it to the left

13 / 20

Which of these vehicles would usually have an air brake system?

A pickup truck

A hearse

A school bus

A compact car

14 / 20

What is the "cut-out" level?

The maximum speed the air brakes can stop at

The pressure level that triggers the governor to turn on the air compressor

The safest pressure level you can turn off the truck at

The pressure level that triggers the governor to cut off the air compressor

15 / 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 closes, leaving the brake pressure the same

The air valve signals the compressor to turn on

The air valve opens letting more air into the brakes

16 / 20

What might happen if the air lines are cross connected?

The spring brakes won't work

The towing vehicle will lose air

The service brakes will not function correctly

Any of these

17 / 20

System air loss should be measured by applying the brake for how long?

5 minutes

2 minutes

1 minute

10 minutes

18 / 20

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

So you're not suprised

Because you should know your truck

Because it can be dangerous

In case anyone ever asks

19 / 20

Most air brake systems will use automatic valves to?

Reduce pressure at the front wheels

Increase pressure at the back wheels

Reduce pressure at the back wheels

Increase pressure at the front wheels

20 / 20

What is the "cut in" level?

The pressure level that triggers the governor to cut off the air compressor

The safest pressure level you can turn off the truck at

The maximum speed the air brakes can stop at

The pressure level that triggers the governor to turn on the air compressor

Thanks for taking the practice test!

Enter your info to sign up for our mailing list or click "See Result" to move on.

NameEmail

Your score is

The average score is 88%

More Nova Scotia Commercial Driving Practice Tests

Nova Scotia Class 1 Practice Tests

Nova Scotia Class 3 Practice Tests

Air Brakes Practice Tests

Nova Scotia Class 4 Practice Tests

Nova Scotia 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.