PEI Commercial Drivers License Air Brakes Practice Test 4

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PEI Air Brakes Practice Test 4

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

1 / 20

What is the "cut-out" level?

The safest pressure level you can turn off the truck at

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

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

The maximum speed the air brakes can stop at

2 / 20

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

The first tank

Wheel bearings

The second tank

Supply tank

3 / 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

4 / 20

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

Pull out the control

Twist it to the right

Press down the pedal

Twist it to the left

5 / 20

Correct belt tension for an air compressor can be determined by

A karate chop

Firm hand pressure

Finger pressure

A tight squeeze of the hand

6 / 20

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

Engaging the brake pedal

Driving 150 metres

Starting the truck

Switching the gears

7 / 20

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

Over weight limits

Sleepy drivers

Air brakes

Tire treads

8 / 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?

5 mins

4 mins

1 min

2 mins

9 / 20

What is the "cut in" 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 turn on the air compressor

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

10 / 20

Test the low pressure alarm with the air pressure above __________.

551 kPa (80 psi)

620 kPa (90 psi)

827 kPa (120 psi)

413 kPa (60 psi)

11 / 20

Where is the brake lining fastened?

The wheel well

The struts

The rim of the tire

The brake shoe

12 / 20

What should you do when the air brakes low pressure warning comes on?

Stop safely and immediately

Call the police to let them know

Check it at the nearest garage

Slow down but keep driving

13 / 20

What is the service brake used for?

Drifting

None of these

Normal braking

Emergency braking

14 / 20

What is a "glad hand"?

A coupling device

An emergency supply line

The crank for the trailer legs

A dance move

15 / 20

Which statement is true of spring brakes?

They are as strong as service brakes

They are not as strong as service brakes

They are stronger than service brakes

They can be used in lieu of service brakes

16 / 20

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

Weekly

Monthly

Daily

Quarterly

17 / 20

What might happen if the air lines are cross connected?

The spring brakes won't work

The towing vehicle will lose air

The service brakes will not function correctly

Any of these

18 / 20

What function does the alcohol evaporator perform?

Prevents overheating

Prevents freezing

Prevents moisture build ups in the brake lines

Prevents the system from building up too much pressure

19 / 20

What is the best way to inspect an air compressor?

With the engine on in neutral

With the engine on and in high gear

With the engine on in first gear

With the engine off

20 / 20

If the outer layer of an airline is damaged, but the inner layer is ok, what should you do?

Turn off your air brakes

Replace the line

Cover it with tape

Leave it alone, it's fine

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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.