Nova Scotia Commercial Drivers License Air Brakes Practice Test 4

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Nova Scotia Air Brakes Practice Test 4

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

1 / 20

The best way to reduce rough and abrupt braking is to?

Follow other vehicles at a safe distance

Ride the brake pedal all the time

Wear a helmet in the cab

Drive on highways only

2 / 20

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

You can if you are the owner

Anyone

Your employer

Only certified technicians

3 / 20

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

Quarterly

Daily

Weekly

Monthly

4 / 20

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

28 kPa/minute

26 kPa/minute

34 kPa/minute

32 kPa/minute

5 / 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

6 / 20

Which can contaminate a brake systems air lines?

Dust

Dirt

Grease and oil

Water and salt

7 / 20

Why is it important to know where your air system releases air pressure from?

Because you should know your truck

So you're not suprised

Because it can be dangerous

In case anyone ever asks

8 / 20

What happens to the air valve when you press down the brake?

The air valve closes, leaving the brake pressure the same

The air valve opens letting more air into the brakes

The air valve is operated by the gas pedal

The air valve signals the compressor to turn on

9 / 20

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

A compact car

A school bus

A pickup truck

A hearse

10 / 20

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

Wheel bearings

Supply tank

The first tank

The second tank

11 / 20

What function does the alcohol evaporator perform?

Prevents freezing

Prevents the system from building up too much pressure

Prevents overheating

Prevents moisture build ups in the brake lines

12 / 20

What might happen if the air lines are cross connected?

The spring brakes won't work

The service brakes will not function correctly

The towing vehicle will lose air

Any of these

13 / 20

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

The second air tank

The last air tank

The first air tank

The supply tank

14 / 20

Where is the air pressure gauge for the air brake system?

On each wheels brake

Beside the supply tank

On the vehicle dashboard

Beside the air compressor

15 / 20

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

Dust mask, safety glasses

Shorts and Crocs

Steel toe boots, safety glasses, hard hats

Sandals and shorts

16 / 20

What is the "cut in" level?

The maximum speed the air brakes can stop 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 safest pressure level you can turn off the truck at

17 / 20

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

Pull out the control

Press down the pedal

Twist it to the right

Twist it to the left

18 / 20

What is the "cut-out" 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

19 / 20

System air loss should be measured by applying the brake for how long?

10 minutes

1 minute

2 minutes

5 minutes

20 / 20

Which statement is true of spring brakes?

They are not as strong as service brakes

They can be used in lieu of service brakes

They are stronger than service brakes

They are as strong as service brakes

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More Nova Scotia Commercial Driving Practice Tests

Nova Scotia Class 1 Practice Tests

Nova Scotia Class 3 Practice Tests

Air Brakes Practice Tests

Nova Scotia Class 4 Practice Tests

Nova Scotia 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.