Air Brake Practice Test 05

If you’re planning to take the Canadian air brake test, preparing well in advance is always a good idea. One of the best ways to do so is by taking the free Air Brake Practice Test, available online. This test will give you a good idea of what to expect from the official exam and help you identify areas where you may need to focus your studies.

1 / 30

What is a tractor protection system?

None of these

It's similar to a warranty

It prevents total loss of air from the tractor if the trailer breaks away, or if the connecting air lines between tractor and trailer become separated or ruptured

It protects the spring brakes from being unintentionally caged

2 / 30

How many air lines are normally running to the tractor protection valve?

Four

One

Two

Five

3 / 30

What is the most common type of trailer supply valve?

The manual trailer supply valve

The 3-step supply valve

The semi-automatic supply valve

The automatic trailer supply valve

4 / 30

What's the problem with a tractor protection valve with a broken return spring?

It locks the brakes

The brakes fail to work

It may cause personal injury while trying to address it

It will not close the valve and will cause loss of air during normal brake applications if operating the tractor without a trailer

5 / 30

Would there be any air loss if the driver, by mistake, applied the hand valve with the trailer disconnected?

Yes

Only 50% loss

A 25% loss of air would occur

6 / 30

What are the other names for the trailer supply valve?

The trailer supplement valve

The trailer parking control and emergency valve

The trailer secondary valve

All of the above

7 / 30

What is the application line referred to as?

A control line

A back-up line

A feeder line

The main line

8 / 30

When connecting the glad hands, start with the two gaskets together and the couplers at what angle to each other?

60°

90°

75°

45°

9 / 30

The tractor protection valve is spring-loaded and requires approximately how many psi in the supply line to open the valve?

25 psi

35 psi

50 psi

45 psi

10 / 30

If the driver closes the trailer supply valve manually, what will open?

Nothing opens

The service brake chambers

The exhaust port without the pressure being depleted from the tractor reservoir

The spring brake chambers

11 / 30

Where is a tractor protection valve normally located?

On the driver's side of the tractor cab

At the front of the tractor cab

At the front right of the tractor cab

Near the rear of the tractor cab

12 / 30

What is the application line connected to?

The safety valve

The trailer relay valve

The foot valve and the hand valve

The one-way check valve

13 / 30

What is the referred to when the tractor is being operated alone?

Separated

Bobtailing

Bobcating

Solitary

14 / 30

What do the glad hands have to stop air from escaping?

Hexagon screws

Nothing

Clips

Rubber gaskets

15 / 30

What is the purpose of the trailer hand valve?

To allow the driver to control independently the amount of application air pressure to be directed to the trailer brakes

All of the above

To team the tractor and the trailer brake system together

To reduce the lag time from tractor to trailer

16 / 30

With regards to the application line, when the driver depresses the foot valve treadle application air will be delivered to where?

Just to the tractor brake chambers

To the tractor brake chambers and to the trailer brake chambers

To the spring brake chambers of the trailer

To the trailer brake chambers and the trailer spring brake chambers

17 / 30

If the trailer broke away from the tractor, what would the problem be?

None of these

The trailer would only have spring brakes

The trailer would not have brakes

The trailer would have 50% of braking power

18 / 30

Any time a trailer brake application is made using the hand valve, can the driver still press the foot valve?

Not at all

Yes

Not until the air has been released from the hand valve

Only when it appears the trailer brakes are activated

19 / 30

What does opening the trailer supply valve do?

It stops reservoir air pressure from flowing through

It blocks air pressure from reaching the foot valve

It permits reservoir air pressure to flow through

It sends air pressure to the foot valve

20 / 30

When the driver releases the foot valve treadle, the application air to the trailer brake chambers must go where?

Through the two-way valve

Immediately into the atmosphere

Through the one-way valve

Must return to the foot valve to be exhausted to the atmosphere

21 / 30

What is referred to as glad hands?

The connecting devices between the front and rear of the trailer

The coupling device used to connect the control and supply lines of the trailer to the tractor

The dolly used to bring a trailer up to code

The parts that connect a U-bolt connector

22 / 30

The tractor protection system consists of how many valves?

One

Three

Two

Four

23 / 30

Glad hands and lines should also be secured to prevent what from happening?

None of these

Theft

Cracking

The lines from chafing against vehicle components or bouncing off the vehicle

24 / 30

Disconnecting the supply line between the tractor and trailer while the trailer is charged, will cause what to happen?

An immediate loss of pressure in the brake chamber

All of the above

An immediate loss of pressure in the supply line on the tractor causing the tractor protection valve to close

An immediate loss of pressure in the secondary tank

25 / 30

What happens if the air pressure drops to a range between 45 and 20 psi?

The valve will automatically remain open

The brake fade

The valve will close automatically by spring pressure, opening the exhaust port

None of these

26 / 30

What happens if the driver, by mistake, applied the hand valve with the trailer disconnected?

None of these

The application air directed to the tractor protection valve would also be dead ended

The application air would be dispersed into the atmosphere

The application air would be diverted to the tractor's service brakes

27 / 30

The tractor protection valve is fed by how many lines?

Two

Three

One

Four

28 / 30

Why should the trailer brake hand valve not be used for parking?

It stops all of the tractor brakes to fail

It may remain locked

Air may bleed off if the engine is stopped or the hand valve moves to the released position

None of these

29 / 30

Where is a relay emergency valve mounted?

Inside the wheel hubs

On the trailer reservoir or to the trailer frame near the brake chambers

On the centre of the axles

Above the wheels

30 / 30

What should be used when the vehicle is used without a trailer to prevent water and dirt from entering the coupler and lines?

One-way couplers

Neutral couplers

Dummy couplers

Dead end couplers

Your score is

Air Brake Practice Test 05

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