Newfoundland Commercial Drivers License Air Brakes Practice Test 2

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Newfoundland Air Brakes Practice Test 2

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

1 / 20

What is the best way to inspect an air compressor?

With the engine on in first gear

With the engine on and in high gear

With the engine on in neutral

With the engine off

2 / 20

Doing this will put unnecessary strain on your vehicles braking system.

Driving the speed limit

Proper maintenance

Driving too slow

Exceeding the vehicles weight limit

3 / 20

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

The front wheels are blocked

The wheels can only turn a half revolution

The vehicle only moves slightly back and forth

The truck can move 1.5 meters

4 / 20

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

A pickup truck

A hearse

A school bus

A compact car

5 / 20

Cut out pressure level must never exceed __________.

1138 kPa (165 psi)

1000 kPa (145 psi)

862 kPa (125 psi)

690 kPa (100 psi)

6 / 20

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

Shorts and Crocs

Sandals and shorts

Dust mask, safety glasses

Steel toe boots, safety glasses, hard hats

7 / 20

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

The second air tank

The first air tank

The supply tank

The last air tank

8 / 20

Which colour represent the trailer supply line?

Blue

White

Yellow

Red

9 / 20

When brakes become overheated they also become?

Dangerously inefficient

None of the above

Very hot

Extra efficient

10 / 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 opens letting more air into the brakes

The air valve signals the compressor to turn on

11 / 20

Which type of trailer can be towed before the service tanks are full?

A service brake priority trailer

None of these

Both of these

A spring brake priority trailer

12 / 20

What is a "glad hand"?

An emergency supply line

A coupling device

A dance move

The crank for the trailer legs

13 / 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

14 / 20

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

Blue

Red

Yellow

Black

15 / 20

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

Press down the pedal

Twist it to the left

Pull out the control

Twist it to the right

16 / 20

The supply tank should discharge more moisture than any other tank?

False

True

17 / 20

A warning system must alert the driver when the pressure drops below?

242 kPs (35 psi)

551 kPa (80 psi)

413 kPa (60 psi)

380 kPa (55 psi)

18 / 20

The low air pressure warning device needs to be replaced or adjusted if it does not trigger at a minimum level of?

242 kPs (35 psi)

380 kPa (55 psi)

551 kPa (80 psi)

413 kPa (60 psi)

19 / 20

A commercial vehicle with air brakes engaged must not lose air pressure faster than?

38 kPa/minute

32 kPa/minute

21 kPa/minute

26 kPa/minute

20 / 20

What powers the air brakes air compressor system?

The rotation of the wheels

The trucks engine

Overhead wires

The battery

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More Newfoundland 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.