New Brunswick Commercial Drivers License Air Brakes Practice Test 2

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New Brunswick Air Brakes Practice Test 2

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

1 / 20

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

Twist it to the right

Twist it to the left

Press down the pedal

Pull out the control

2 / 20

What does a governor do in an air brake system?

Tells the other brakes what do to

Regulates the air pressure

Regulates the tire pressure

Limits the speed by using automatic braking

3 / 20

What is the "cut in" 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

4 / 20

Which can contaminate a brake systems air lines?

Dirt

Grease and oil

Water and salt

Dust

5 / 20

Which of these is not part of an air brake system?

Shoe

Drum

Rotors

Lining

6 / 20

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

Over weight limits

Sleepy drivers

Tire treads

Air brakes

7 / 20

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

The first tank

The second tank

Supply tank

Wheel bearings

8 / 20

Which of these significantly decreases the brake force produced at the wheel?

Overextension of the brake chamber pushrod

Cold air temperatures

High pressure in the compressed air tanks

Damp road conditions

9 / 20

What is the "cut-out" level?

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

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

The maximum speed the air brakes can stop at

The safest pressure level you can turn off the truck at

10 / 20

Which statement is true of spring brakes?

They are stronger than service brakes

They are as strong as service brakes

They can be used in lieu of service brakes

They are not as strong as service brakes

11 / 20

Which colour represent the trailer supply line?

Blue

Red

Yellow

White

12 / 20

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

Weekly

Quarterly

Monthly

Daily

13 / 20

What might happen if the air lines are cross connected?

The spring brakes won't work

Any of these

The towing vehicle will lose air

The service brakes will not function correctly

14 / 20

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

Beside the supply tank

Beside the air compressor

On each wheels brake

On the vehicle dashboard

15 / 20

When you are testing your spring brakes, the test is considered a success when?

The truck can move 1.5 meters

The wheels can only turn a half revolution

The vehicle only moves slightly back and forth

The front wheels are blocked

16 / 20

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

Shorts and Crocs

Steel toe boots, safety glasses, hard hats

Dust mask, safety glasses

Sandals and shorts

17 / 20

Where is the brake lining fastened?

The wheel well

The rim of the tire

The struts

The brake shoe

18 / 20

A vehicle should have wheel chocks or blocks securing it in place during inspection if...?

The driver leaves the cab without applying the parking brake

Any of these apply

The driver leaves the cab under any circumstances

The driver is not within 50 m of the vehicle

19 / 20

Th design of the wedge brake system allows them to?

Self lubricate

Self isolate

Self adust

Self seal

20 / 20

What is not a factor in how well your air brake system works?

Brake adjustments

Weight of the vehicle

Weight of the driver

Driving speed

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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.