New Brunswick Commercial Drivers License Class 3 Practice Test 5

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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.

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Commercial Driver HQ

New Brunswick Class 3 Practice Test 5

A 20 question practice test to help prepare you for the Class 3 knowledge test in New Brunswick

1 / 20

A broken yellow line on the pavement to the left of you means what?

Do not pass

You may pass when clear

Trucks stay right

Two way street

2 / 20

What does this construction sign mean?

Small cars only

Pavement ends ahead

Grooves in the pavement ahead

Bumpy road ahead

3 / 20

Your truck or other commercial vehicle must be have?

Water

Spare tires

Moving blankets

Portable reflectors

4 / 20

What does this sign mean?

Stop sign ahead. Slow down

Dead end street ahead

Slow moving vehicle ahead

Yield right-of-way

5 / 20

What does this yellow diamond sign mean?

Road construction ahead

Divided highway begins

Divided highway ends

Narrow bridge ahead

6 / 20

How many previous days must a drivers log keep track of?

Twenty one

Seven

Thirty

Fourteen

7 / 20

When is a pre-trip inspection required?

When a light comes on the dashboard

When there is visual damage

Daily

Weekly

8 / 20

What does this sign tell you about the road ahead?

Bridge ahead

Construction zone ahead

River ahead

Bumps on the pavement ahead

9 / 20

What is the "cut in" level?

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

The maximum speed the air brakes can stop at

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

The safest pressure level you can turn off the truck at

10 / 20

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

Air brakes

Sleepy drivers

Tire treads

Over weight limits

11 / 20

What is the gross weight of your vehicle?

Weight of the load and the vehicle

Weight of the load

Weight of the vehicle itself

Weight of the driver

12 / 20

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

The last air tank

The supply tank

The first air tank

The second air tank

13 / 20

Don't use the differential lock when __________?

The wheels are different

Carrying a load

The wheels are spinning

The vehicle is stopped

14 / 20

As an operator you are required to have vehicles and trailers inspected how often?

Semi-annually

Monthly

Annually

Weekly

15 / 20

What is the wheel base of a vehicle?

The surface of the road covered by the tires

How much room is needed to turn safely

The size of the tires on the rear axle

Distance between the front and rear axle

16 / 20

How do you define Gross Weight?

Weight of your empty vehicle

Weight of the driver

Weight of just the load

Weight of the vehicle and the load

17 / 20

What does this sign mean?

Not a two lane highway

No passing

Cars side by side only

Carpool lane only

18 / 20

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

The foundation brake components

The air compressor

The air lines

The pressure gauge

19 / 20

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

The air valve closes, leaving the brake pressure the same

The air valve opens letting more air into the brakes

The air valve signals the compressor to turn on

The air valve is operated by the gas pedal

20 / 20

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

Engaging the brake pedal

Switching the gears

Driving 150 metres

Starting the truck

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Your score is

The average score is 85%

Want to know more? Learn all about getting your Class 3 drivers license in New Brunswick

More New Brunswick Commercial Driving Practice Tests

New Brunswick Class 1 Practice Tests

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.