Saskatchewan Commercial Drivers License Air Brakes Practice Test 3

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Saskatchewan Air Brakes Practice Test 3

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

1 / 20

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

The supply tank

The first air tank

The last air tank

The second air tank

2 / 20

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

Switching the gears

Driving 150 metres

Engaging the brake pedal

Starting the truck

3 / 20

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

38 kPa/minute

26 kPa/minute

32 kPa/minute

21 kPa/minute

4 / 20

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

The driver leaves the cab without applying the parking brake

The driver leaves the cab under any circumstances

The driver is not within 50 m of the vehicle

Any of these apply

5 / 20

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

Release the spring brakes and apply the service brake

Fill the compressor

Start the engine

Cover the chamber in soapy water

6 / 20

When brakes become overheated they also become?

Very hot

Extra efficient

Dangerously inefficient

None of the above

7 / 20

Cut in pressure level must never fall below __________.

551 kPa (80 psi)

413 kPa (60 psi)

345 kPa (50 psi)

690 kPa (100 psi)

8 / 20

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

690 kPa (100 psi)

414 kPa (60 psi)

514 kPa (74 psi)

242 kPa (35 psi)

9 / 20

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

200 to 500 RPM

1000 to 2000 RPM

800 to 1000 RPM

600 to 900 RPM

10 / 20

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

New holes from wear and tear

Mismatched slack adjuster lengths

All of the below

Cracks or other damage

11 / 20

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

551 kPa (80 psi)

380 kPa (55 psi)

242 kPs (35 psi)

413 kPa (60 psi)

12 / 20

The pushrod stroke occurs when compressed air enters the?

Air compressor

Engine block

Brake chamber

Supply tank

13 / 20

The spring brake is designed for which situation?

Skids and emergencies

Parking and emergencies

Skids and parking

Loading skids into the trailer

14 / 20

Cut out pressure level must never exceed __________.

1138 kPa (165 psi)

862 kPa (125 psi)

1000 kPa (145 psi)

690 kPa (100 psi)

15 / 20

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

32 kPa/minute

26 kPa/minute

34 kPa/minute

28 kPa/minute

16 / 20

Where is the brake lining fastened?

The rim of the tire

The brake shoe

The struts

The wheel well

17 / 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?

2 mins

1 min

4 mins

5 mins

18 / 20

What does a governor do in an air brake system?

Regulates the air pressure

Limits the speed by using automatic braking

Regulates the tire pressure

Tells the other brakes what do to

19 / 20

What is the best way to inspect an air compressor?

With the engine on in first gear

With the engine on in neutral

With the engine off

With the engine on and in high gear

20 / 20

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

Unbalanced weight

More power than necessary

Unbalanced braking

Efficient stopping

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More Saskatchewan Commercial Driving Practice Tests

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Saskatchewan Class 3 Practice Tests

Air Brakes Practice Tests

Saskatchewan Class 4 Practice Tests

Saskatchewan 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.