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

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

Driving too slow

Proper maintenance

Driving the speed limit

Exceeding the vehicles weight limit

2 / 20

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

Release the spring brakes and apply the service brake

Fill the compressor

Cover the chamber in soapy water

Start the engine

3 / 20

The pushrod stroke occurs when compressed air enters the?

Engine block

Brake chamber

Supply tank

Air compressor

4 / 20

Spring brake controls are usually what color?

Blue

Orange

Yellow

Red

5 / 20

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

242 kPa (35 psi)

514 kPa (74 psi)

690 kPa (100 psi)

414 kPa (60 psi)

6 / 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

7 / 20

When brakes become overheated they also become?

Dangerously inefficient

Very hot

None of the above

Extra efficient

8 / 20

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

32 kPa/minute

28 kPa/minute

26 kPa/minute

34 kPa/minute

9 / 20

Cut in pressure level must never fall below __________.

690 kPa (100 psi)

413 kPa (60 psi)

345 kPa (50 psi)

551 kPa (80 psi)

10 / 20

Why are their two service tanks?

Incase you need more stopping power

For efficiency

For safety

For fuel economy

11 / 20

Most air brake systems will use automatic valves to?

Increase pressure at the front wheels

Reduce pressure at the front wheels

Increase pressure at the back wheels

Reduce pressure at the back wheels

12 / 20

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

Lining

Shoe

Rotors

Drum

13 / 20

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

Mismatched slack adjuster lengths

New holes from wear and tear

All of the below

Cracks or other damage

14 / 20

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

The driver is not within 50 m of the vehicle

Any of these apply

The driver leaves the cab without applying the parking brake

The driver leaves the cab under any circumstances

15 / 20

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

Overextension of the brake chamber pushrod

High pressure in the compressed air tanks

Cold air temperatures

Damp road conditions

16 / 20

The air system pressure range must be between _________.

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

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

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

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

17 / 20

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

50 kPa / minute

19 kPa / minute

21 kPa / minute

37 kPa / minute

18 / 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

19 / 20

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

600 to 900 RPM

1000 to 2000 RPM

800 to 1000 RPM

200 to 500 RPM

20 / 20

Th design of the wedge brake system allows them to?

Self adust

Self lubricate

Self isolate

Self seal

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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.