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

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

The application air would be dispersed into the atmosphere

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

None of these

2 / 30

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

Dead end couplers

One-way couplers

Neutral couplers

Dummy couplers

3 / 30

What is the application line referred to as?

The main line

A control line

A back-up line

A feeder line

4 / 30

The tractor protection valve is fed by how many lines?

Two

Three

Four

One

5 / 30

What is the purpose of the trailer hand valve?

To team the tractor and the trailer brake system together

All of the above

To reduce the lag time from tractor to trailer

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

6 / 30

Where is a relay emergency valve mounted?

On the centre of the axles

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

Inside the wheel hubs

Above the wheels

7 / 30

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

Clips

Nothing

Hexagon screws

Rubber gaskets

8 / 30

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

Yes

A 25% loss of air would occur

Only 50% loss

9 / 30

What is a tractor protection system?

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

None of these

It protects the spring brakes from being unintentionally caged

10 / 30

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

Theft

None of these

Cracking

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

11 / 30

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

90°

45°

60°

75°

12 / 30

What are the other names for the trailer supply valve?

The trailer secondary valve

The trailer supplement valve

All of the above

The trailer parking control and emergency valve

13 / 30

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

One

Two

Four

Five

14 / 30

Where is a tractor protection valve normally located?

At the front of the tractor cab

At the front right of the tractor cab

On the driver's side of the tractor cab

Near the rear of the tractor cab

15 / 30

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

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

It stops all of the tractor brakes to fail

It may remain locked

None of these

16 / 30

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

50 psi

25 psi

35 psi

45 psi

17 / 30

The tractor protection system consists of how many valves?

One

Two

Four

Three

18 / 30

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

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

The spring brake chambers

The service brake chambers

Nothing opens

19 / 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 supply line on the tractor causing the tractor protection valve to close

All of the above

An immediate loss of pressure in the brake chamber

An immediate loss of pressure in the secondary tank

20 / 30

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

Bobtailing

Separated

Bobcating

Solitary

21 / 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 trailer brake chambers and the trailer spring brake chambers

To the tractor brake chambers and to the trailer brake chambers

To the spring brake chambers of the trailer

22 / 30

What does opening the trailer supply valve do?

It blocks air pressure from reaching the foot valve

It stops reservoir air pressure from flowing through

It sends air pressure to the foot valve

It permits reservoir air pressure to flow through

23 / 30

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

The trailer would have 50% of braking power

The trailer would not have brakes

The trailer would only have spring brakes

None of these

24 / 30

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

The brake fade

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

None of these

The valve will automatically remain open

25 / 30

What is referred to as glad hands?

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

The parts that connect a U-bolt connector

The connecting devices between the front and rear of the trailer

The dolly used to bring a trailer up to code

26 / 30

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

The brakes fail to work

It locks the brakes

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

27 / 30

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

Through the one-way valve

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

Through the two-way valve

Immediately into the atmosphere

28 / 30

What is the most common type of trailer supply valve?

The manual trailer supply valve

The automatic trailer supply valve

The 3-step supply valve

The semi-automatic supply valve

29 / 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

Only when it appears the trailer brakes are activated

Not until the air has been released from the hand valve

30 / 30

What is the application line connected to?

The foot valve and the hand valve

The one-way check valve

The trailer relay valve

The safety valve

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Air Brake Practice Test 05

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