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. The practice test is designed to test the understanding and knowledge of potential drivers on important aspects of air brake systems, such as the 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.

1 / 30

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

Oil

Dirt

Nothing

Water

2 / 30

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

Low

Normal

It doesn't matter

High

3 / 30

What is another name for the supply tank?

Wet tank

Dry tank

Primary tank

Main tank

4 / 30

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

Dry tanks

Useful tanks

Double tanks

Wet tanks

5 / 30

How many separate air pressure gauges can vehicles have?

Two

Unlimited

Four

Three

6 / 30

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

120 psi

135 psi

150 psi

145 psi

7 / 30

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

Smaller valves

An air dryer

All of the above

A filter

8 / 30

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

A lubricant

All of the above

An alcohol vapor

High-pressure air

9 / 30

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

None of the above

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

That the brakes are over-heating

That the brake system is working as it should

10 / 30

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

Supply tank

Main tank

Primary tank

First tank

11 / 30

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

Every 72 hours

Every 48 hours

Weekly

Daily

12 / 30

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

Dirt

Moisture

Metal fragments

Nothing

13 / 30

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

One

Four

Two

Three

14 / 30

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

A warning buzzer happens

It will cause the governor to turn off

It will cause the compressor to start pumping air again

It will cause a warning light to flash

15 / 30

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

Duty tanks

Double tanks

Working tanks

Dual-service tanks

16 / 30

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

A foot valve

A one-way check valve

A stop valve

None of the above

17 / 30

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

It warns the driver of impending brake failure

None of the above

It slowly brakes

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

18 / 30

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

The supply tank

The secondary tank

It doesn't matter

The primary tank

19 / 30

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

None of the above

Brackets

Pushrods

Belts and pulleys

20 / 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 breaks the compressor

It turns off the compressor

The engine stalls

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

21 / 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 freeze in cold temperatures and may cause brake failure

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

22 / 30

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

Additional moisture

Rust

Sludge

All of the above

23 / 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

24 / 30

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

Two

Three

Four

One

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 builds up

It goes trough the one-way valve

It sits in the air lines

26 / 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

27 / 30

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

The system shuts down

The driver receives a warning signal on the dashboard

The second governor kicks in

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

28 / 30

What happens to the moisture collected in the air dryer?

It evaporates

It gets pushed back into the supply tank

Nothing

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

29 / 30

Where is an air dryer located?

Inside the compressor

Next to the governor

Between the air compressor and the supply tank

In front of the compressor

30 / 30

What is the purpose of the governor?

All of the above

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

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

To monitor how the air is pushed through the lines

Your score is

Ontario Air Brake Test 02

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