PEI Commercial Drivers License Air Brakes Practice Test 3

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PEI Air Brakes Practice Test 3

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

1 / 20

Which colour represent the trailer supply line?

White

Yellow

Blue

Red

2 / 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

3 / 20

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

Drum

Lining

Rotors

Shoe

4 / 20

When can you adjust your own air brakes?

If you are certified or trained

Never

If it is an emergency

When you are on the road

5 / 20

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

A compact car

A pickup truck

A school bus

A hearse

6 / 20

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

The foundation brake components

The air compressor

The pressure gauge

The air lines

7 / 20

What is an ABS system?

Prevents wheel lock

Reduces stopping distance

Automatically brakes when needed

Increases braking power

8 / 20

Who can perform adjustments and maintenance on your air brake system?

You can if you are the owner

Your employer

Only certified technicians

Anyone

9 / 20

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

Pull out the control

Press down the pedal

Twist it to the left

Twist it to the right

10 / 20

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

Ride the brake pedal all the time

Wear a helmet in the cab

Follow other vehicles at a safe distance

Drive on highways only

11 / 20

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

A spring brake priority trailer

A service brake priority trailer

None of these

Both of these

12 / 20

The air system pressure range must be between _________.

551 kPa (80 psi) and 1000 kPa (145 psi)

413 kPa (60 psi) and 828 kPa (120 psi)

690 kPa (100 psi) and 1380 kPa (200 psi)

483 kPa (70 psi) and 1138 kPa (165 psi)

13 / 20

If brake chambers on opposite side of an axle are different sizes, this may cause?

Efficient stopping

More power than necessary

Unbalanced braking

Unbalanced weight

14 / 20

How long should it take for the air pressure to rise from 587kPa to 690 kPa after the pressure had fallen below 552 kPa?

1 min

5 mins

4 mins

2 mins

15 / 20

Where are the vehicles air tanks located?

Inside the wheel

Underneath around the frame

In the cab of the vehicle

In the engine compartment

16 / 20

To measure the time it takes to build up pressure in the air system, the engine should be idling between _______________.

800 to 1000 RPM

1000 to 2000 RPM

600 to 900 RPM

200 to 500 RPM

17 / 20

Where is the brake lining fastened?

The rim of the tire

The wheel well

The struts

The brake shoe

18 / 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 off

With the engine on in neutral

19 / 20

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

Sleepy drivers

Air brakes

Tire treads

Over weight limits

20 / 20

Why are their two service tanks?

Incase you need more stopping power

For fuel economy

For safety

For efficiency

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More PEI Commercial Driving Practice Tests

PEI Class 1 Practice Tests

PEI Class 3 Practice Tests

Air Brakes Practice Tests

PEI Class 4 Practice Tests

PEI 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.