PEI Commercial Drivers License Air Brakes Practice Test 5

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PEI Air Brakes Practice Test 5

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

1 / 20

When brakes become overheated they also become?

Very hot

Dangerously inefficient

Extra efficient

None of the above

2 / 20

Any commercial vehicle with air brakes must not lose system pressure with the brakes applied at a rate of more than?

19 kPa / minute

37 kPa / minute

50 kPa / minute

21 kPa / minute

3 / 20

Spring brake controls are usually what color?

Orange

Blue

Yellow

Red

4 / 20

You should be looking for this when checking your brake chambers?

New holes from wear and tear

All of the below

Mismatched slack adjuster lengths

Cracks or other damage

5 / 20

The air system pressure range must be between _________.

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

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

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

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

6 / 20

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

Rotors

Drum

Lining

Shoe

7 / 20

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

A spring brake priority trailer

None of these

A service brake priority trailer

Both of these

8 / 20

Cut in pressure level must never fall below __________.

551 kPa (80 psi)

690 kPa (100 psi)

345 kPa (50 psi)

413 kPa (60 psi)

9 / 20

Why are their two service tanks?

For efficiency

Incase you need more stopping power

For fuel economy

For safety

10 / 20

Trailer air brake systems must apply a spring brake when the pressure drops below?

414 kPa (60 psi)

690 kPa (100 psi)

242 kPa (35 psi)

514 kPa (74 psi)

11 / 20

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

The last air tank

The first air tank

The second air tank

The supply tank

12 / 20

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

Cold air temperatures

High pressure in the compressed air tanks

Overextension of the brake chamber pushrod

Damp road conditions

13 / 20

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

Proper maintenance

Driving the speed limit

Exceeding the vehicles weight limit

Driving too slow

14 / 20

How much air loss is allowed for a tractor and a trailer when the brakes are engaged?

28 kPa/minute

32 kPa/minute

34 kPa/minute

26 kPa/minute

15 / 20

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

Any of these apply

The driver is not within 50 m of the vehicle

The driver leaves the cab without applying the parking brake

The driver leaves the cab under any circumstances

16 / 20

Most air brake systems will use automatic valves to?

Increase pressure at the back wheels

Increase pressure at the front wheels

Reduce pressure at the front wheels

Reduce pressure at the back wheels

17 / 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

600 to 900 RPM

1000 to 2000 RPM

200 to 500 RPM

18 / 20

Before inspecting for air brake chamber leaks, you must __________.

Cover the chamber in soapy water

Release the spring brakes and apply the service brake

Start the engine

Fill the compressor

19 / 20

Th design of the wedge brake system allows them to?

Self seal

Self lubricate

Self adust

Self isolate

20 / 20

The pushrod stroke occurs when compressed air enters the?

Supply tank

Brake chamber

Air compressor

Engine block

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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.