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

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

Daily

Monthly

Quarterly

Weekly

2 / 20

Which statement is true of spring brakes?

They are as strong as service brakes

They can be used in lieu of service brakes

They are stronger than service brakes

They are not as strong as service brakes

3 / 20

Th design of the wedge brake system allows them to?

Self isolate

Self lubricate

Self adust

Self seal

4 / 20

What is the "cut in" level?

The safest pressure level you can turn off the truck at

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

The maximum speed the air brakes can stop at

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

5 / 20

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

Weight of the driver

Driving speed

Weight of the vehicle

Brake adjustments

6 / 20

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

The wheels can only turn a half revolution

The truck can move 1.5 meters

The front wheels are blocked

The vehicle only moves slightly back and forth

7 / 20

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

Sleepy drivers

Air brakes

Tire treads

Over weight limits

8 / 20

What might happen if the air lines are cross connected?

The service brakes will not function correctly

Any of these

The spring brakes won't work

The towing vehicle will lose air

9 / 20

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

Rotors

Shoe

Drum

Lining

10 / 20

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

Steel toe boots, safety glasses, hard hats

Sandals and shorts

Shorts and Crocs

Dust mask, safety glasses

11 / 20

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

The driver leaves the cab under any circumstances

The driver is not within 50 m of the vehicle

Any of these apply

The driver leaves the cab without applying the parking brake

12 / 20

Which colour represent the trailer supply line?

Blue

Yellow

White

Red

13 / 20

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

Pull out the control

Twist it to the right

Twist it to the left

Press down the pedal

14 / 20

Where is the brake lining fastened?

The brake shoe

The wheel well

The rim of the tire

The struts

15 / 20

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

On the vehicle dashboard

Beside the supply tank

Beside the air compressor

On each wheels brake

16 / 20

Which can contaminate a brake systems air lines?

Dust

Dirt

Water and salt

Grease and oil

17 / 20

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

Wheel bearings

The first tank

Supply tank

The second tank

18 / 20

What is the "cut-out" level?

The maximum speed the air brakes can stop at

The safest pressure level you can turn off the truck at

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

19 / 20

What does a governor do in an air brake system?

Tells the other brakes what do to

Regulates the air pressure

Limits the speed by using automatic braking

Regulates the tire pressure

20 / 20

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

Overextension of the brake chamber pushrod

Cold air temperatures

Damp road conditions

High pressure in the compressed air tanks

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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.