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 prevents the air flow from returning to the supply tank?

A stop valve

A foot valve

A one-way check valve

None of the above

2 / 30

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

That the brakes are over-heating

That the brake system is working as it should

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

None of the above

3 / 30

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

It will cause the compressor to start pumping air again

A warning buzzer happens

It will cause the governor to turn off

It will cause a warning light to flash

4 / 30

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

It forces air to remain in the supply tank

None of the above

It stops air from escaping back to the supply tank

It will open to allow the excess air pressure to escape

5 / 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?

The engine stalls

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

It breaks the compressor

It turns off the compressor

6 / 30

What happens to the moisture collected in the air dryer?

Nothing

It gets pushed back into the supply tank

It evaporates

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

7 / 30

Where are the air tanks located?

Under or around the frame of the vehicle

Behind the compressor

In the cab

Within the engine compartment

8 / 30

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

135 psi

150 psi

120 psi

145 psi

9 / 30

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

High

Normal

Low

It doesn't matter

10 / 30

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

The supply tank

The primary tank

The secondary tank

It doesn't matter

11 / 30

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

Moisture

Metal fragments

Dirt

Nothing

12 / 30

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

Smaller valves

An air dryer

A filter

All of the above

13 / 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

14 / 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 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 freeze in cold temperatures and may cause brake failure

It can cause the vehicle to come to an abrupt stop

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

15 / 30

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

None of the above

Pushrods

Brackets

Belts and pulleys

16 / 30

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

Four

Two

One

Three

17 / 30

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

Oil

Nothing

Water

Dirt

18 / 30

Where is an air dryer located?

Between the air compressor and the supply tank

In front of the compressor

Next to the governor

Inside the compressor

19 / 30

What is another name for the supply tank?

Main tank

Dry tank

Primary tank

Wet tank

20 / 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

21 / 30

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

Main tank

First tank

Supply tank

Primary tank

22 / 30

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

Wet tanks

Dry tanks

Double tanks

Useful tanks

23 / 30

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

An alcohol vapor

All of the above

High-pressure air

A lubricant

24 / 30

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

Dual-service tanks

Duty tanks

Working tanks

Double tanks

25 / 30

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

It cools and passes through a drying material

It sits in the air lines

It goes trough the one-way valve

It builds up

26 / 30

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

It warns the driver of impending brake failure

It slowly brakes

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

None of the above

27 / 30

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

Four

One

Three

Two

28 / 30

How many separate air pressure gauges can vehicles have?

Three

Four

Two

Unlimited

29 / 30

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

Every 48 hours

Daily

Weekly

Every 72 hours

30 / 30

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

Sludge

Rust

All of the above

Additional moisture

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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