Saskatchewan Commercial Drivers License Air Brakes Practice Test 4

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Saskatchewan Air Brakes Practice Test 4

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

1 / 20

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

High pressure in the compressed air tanks

Cold air temperatures

Overextension of the brake chamber pushrod

Damp road conditions

2 / 20

Activation of trailer spring brakes can be checked by?

Applying slight engine power

Gunning it

Pulling the trailer air valve

Rocking the truck back and forth

3 / 20

What is a "glad hand"?

An emergency supply line

The crank for the trailer legs

A dance move

A coupling device

4 / 20

What function does the alcohol evaporator perform?

Prevents moisture build ups in the brake lines

Prevents the system from building up too much pressure

Prevents freezing

Prevents overheating

5 / 20

Spring brakes will begin to apply when the pressure starts to drop below?

551 kPa (80 psi)

380 kPa (55 psi)

242 kPs (35 psi)

413 kPa (60 psi)

6 / 20

Most air brake systems will use automatic valves to?

Increase pressure at the front wheels

Reduce pressure at the back wheels

Increase pressure at the back wheels

Reduce pressure at the front wheels

7 / 20

Which statement is true of spring brakes?

They are stronger than service brakes

They are as strong as service brakes

They can be used in lieu of service brakes

They are not as strong as service brakes

8 / 20

Which colour usually means the air line is a service line?

Red

Blue

Yellow

Black

9 / 20

When inspecting an air brake system, the person inspecting should wear?

Sandals and shorts

Shorts and Crocs

Dust mask, safety glasses

Steel toe boots, safety glasses, hard hats

10 / 20

Where are the air brake chambers located?

At the front wheels

At the back wheels

Near the compressor

At each wheel

11 / 20

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

Twist it to the right

Press down the pedal

Twist it to the left

Pull out the control

12 / 20

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

21 kPa / minute

50 kPa / minute

19 kPa / minute

37 kPa / minute

13 / 20

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

A pickup truck

A compact car

A school bus

A hearse

14 / 20

What is an ABS system?

Reduces stopping distance

Prevents wheel lock

Automatically brakes when needed

Increases braking power

15 / 20

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

Over weight limits

Sleepy drivers

Air brakes

Tire treads

16 / 20

What might happen if the air lines are cross connected?

The towing vehicle will lose air

The spring brakes won't work

The service brakes will not function correctly

Any of these

17 / 20

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

Only certified technicians

Your employer

Anyone

You can if you are the owner

18 / 20

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

690 kPa (100 psi)

514 kPa (74 psi)

414 kPa (60 psi)

242 kPa (35 psi)

19 / 20

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

Both of these

A spring brake priority trailer

A service brake priority trailer

None of these

20 / 20

Cut out pressure level must never exceed __________.

1000 kPa (145 psi)

690 kPa (100 psi)

862 kPa (125 psi)

1138 kPa (165 psi)

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More Saskatchewan Commercial Driving Practice Tests

Saskatchewan Class 1 Practice Tests

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.