Ontario Air Brake Test 02

Taking the Ontario air brake practice test is an excellent way to prepare for the actual air brake endorsement test, which is conducted in the presence of an authorized officer.

1 / 30

What is another name for the supply tank?

Primary tank

Dry tank

Main tank

Wet tank

2 / 30

Where are the air tanks located?

Within the engine compartment

In the cab

Behind the compressor

Under or around the frame of the vehicle

3 / 30

When the air pressure drops to a certain point, what will the governor do?

It will cause a warning light to flash

It will cause the compressor to start pumping air again

It will cause the governor to turn off

A warning buzzer happens

4 / 30

A drop in air pressure below the normal cut-in setting is a sign of what?

That the brake system is working as it should

That the brakes are over-heating

None of the above

That the air brake system is malfunctioning or that an abnormal demand is being placed on the system

5 / 30

How many separate air pressure gauges can vehicles have?

Three

Two

Unlimited

Four

6 / 30

In some cases, how many tanks are housed within one cylinder?

Four

Three

One

Two

7 / 30

What can the collected moisture and oil mixture from the supply tank form?

Rust

Additional moisture

Sludge

All of the above

8 / 30

What happens after air that is pumped by the air compressor passes through the air dryer?

It builds up

It sits in the air lines

It goes trough the one-way valve

It cools and passes through a drying material

9 / 30

What is the first tank that the compressed air enters called?

First tank

Primary tank

Main tank

Supply tank

10 / 30

A vehicle should only be driven when air pressure is in which range?

Low

It doesn't matter

High

Normal

11 / 30

Which of the following are not some of the problems that can occur if the sludge passes through to the rest of the brake system?

It can cause the vehicle to come to an abrupt stop

It can form a sludge that can pass from the tank into other components of the air brake system, damaging seals and causing brake valves to stick

It can become corrosive and damage the Air-tank and other system components

It can freeze in cold temperatures and may cause brake failure

12 / 30

Where is an air dryer located?

Next to the governor

In front of the compressor

Inside the compressor

Between the air compressor and the supply tank

13 / 30

How often should moisture and oil must be drained from the tanks?

Daily

Every 72 hours

Weekly

Every 48 hours

14 / 30

What's the purpose of the safety valve in the supply tank?

It will open to allow the excess air pressure to escape

It stops air from escaping back to the supply tank

None of the above

It forces air to remain in the supply tank

15 / 30

What is added to the air that will mix with any moisture or ice present and reduce its tendency to freeze?

All of the above

A lubricant

High-pressure air

An alcohol vapor

16 / 30

Air compressors are generally powered directly by the vehicle's engine or by using what?

Brackets

None of the above

Pushrods

Belts and pulleys

17 / 30

What happens if the mixture of moisture and oil that collects in the supply tank passes into the rest of the air brake system?

It turns off the compressor

The engine stalls

It breaks the compressor

It can damage brake components and interfere with the operation of the system

18 / 30

What prevents the air flow from returning to the supply tank?

None of the above

A one-way check valve

A stop valve

A foot valve

19 / 30

What is the purpose of the governor?

To prevent the compressor from producing too much compressed air and to reduce the load on the engine

To monitor how the air is pushed through the lines

To hold back the air pressure before the brakes get too hot

All of the above

20 / 30

The primary and secondary air tanks are also called...

Working tanks

Duty tanks

Dual-service tanks

Double tanks

21 / 30

What happens to the moisture collected in the air dryer?

It's expelled with high-pressure air when the compressor reaches cut-out pressure

It gets pushed back into the supply tank

It evaporates

Nothing

22 / 30

When air leaves the supply tank, it splits into how many circuits?

Three

Two

Four

One

23 / 30

If the governor fails to signal the compressor to cut-out and too much pressure builds up, what happens?

The second governor kicks in

The system shuts down

The safety valves will open to allow the excess air pressure to escape

The driver receives a warning signal on the dashboard

24 / 30

Having two delivery circuits is a safety feature that does what?

It slowly brakes

None of the above

It warns the driver of impending brake failure

Ensures if one circuit fails, the other circuit will provide enough brake function to stop the vehicle

25 / 30

The actual air brake system pressure range must never be higher than...

150 psi

120 psi

145 psi

135 psi

26 / 30

What may also mix with the air that passes through the compressor and settle at the bottom of the tank?

Oil

Dirt

Water

Nothing

27 / 30

What does the air that is drawn in by the air compressor contain?

Moisture

Metal fragments

Dirt

Nothing

28 / 30

Vehicles may use what to reduce the amount of moisture that passes into the air brake system?

All of the above

An air dryer

Smaller valves

A filter

29 / 30

The primary and secondary air tanks are called dual-service tanks, but what else are they called?

Useful tanks

Dry tanks

Double tanks

Wet tanks

30 / 30

When draining the tanks, which tank should always be first?

The secondary tank

The primary tank

It doesn't matter

The supply tank

Your score is

The practice test is designed to assess the understanding and knowledge of potential drivers on essential aspects of air brake systems, including operation, maintenance, and safety procedures. It comprises of 25 multiple-choice questions, with a required pass rate of 80% or higher to secure the endorsement. The province’s Ministry of Transportation recommends that drivers take the practice test several times before attempting the actual one to become comfortable with the material. Overall, taking the Ontario air brake practice test is an essential step towards becoming a successful and safe driver with the proper credentials.

Ontario Air Brake Test 02

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