Air Brake Practice Test 07

If you’re getting ready to take your official Canadian air brake test, it’s crucial to feel as prepared as possible. One great way to boost your confidence is by taking advantage of the free Air Brake Practice Test. This test will allow you to get a feel for the format and content of the official exam, as well as identify any areas where you may need to brush up on your knowledge.

1 / 30

How does differential braking occur?

None of these

When a drive wheel does not spin, it causes the other wheels to stop moving

When the other brakes fail to work, it kicks in

When a drive wheel begins to spin causing the ATC to automatically apply the brake on that wheel and transfer power to the other driving wheels

2 / 30

What is an anti-lock brake system (ABS)?

It's an electronic system that applies 70% braking pressure to avoid wheel lock

It's an electronic system that monitors wheel speed at all times and controls wheel speed while braking

It's an electronic system that applies 50% braking pressure to avoid wheel lock

None of these

3 / 30

Which statement is false? An ABS basically consists of...

A wheel sensor and tooth wheel

A special air hose to each wheel

ABS valve

An electronic control unit (ECU)

4 / 30

The ATC system uses many of the same sensing and control components as...

The ABS system

The park brake system

The hydraulic brake system

The air brake system

5 / 30

What is used to supply the spring parking brake control valve?

Wet air

Exhausted air

Blended air

Compressed air

6 / 30

At approximately how many psi will the spring parking brake control valve on the dash exhaust the remaining air in the secondary circuit?

35 psi

25 psi

20 psi

30 psi

7 / 30

Brake applications can be repeated until...

The brakes heat up

All the air from the secondary circuit is lost

The wheels lock

The foot valve gets stiff

8 / 30

How is the driver informed when wheel slip is detected?

A wig wag drops in front of the driver

Nothing warns the driver

A warning buzzer is activated

A warning light is located on the dash

9 / 30

With combination tractor and trailer with spring parking brakes, to apply the spring parking brakes, the spring parking brake control valve is closed causes...

A build-up of air to activate the spring parking brakes

None of these

The compressor to re-fill the tanks

A loss of air pressure in the line which applies the spring parking brakes

10 / 30

Is automatic traction control (ATC) available on all vehicles?

Only Class 3 vehicles

Only those which may tow trailers

Yes

Only those with ABS

11 / 30

Trailers with ABS will have a system warning light typically mounted where?

On the trailer's left front corner

On the trailer's right front corner

On the trailer's left rear corner

On the trailer's right rear corner

12 / 30

What happens when a vehicle is being operated with the cruise control set and wheel slip is detected?

The ATC will automatically cancel the cruise control setting

The ATC will need to be manually activated with the gears placed in neural

The ATC works with cruise control to stop the vehicle

The ATC will not be activated until the driver releases the cruise control

13 / 30

Which statement is false? The only way the vehicle can be moved after all air is lost is...

Recharge the system

Repair the damaged circuit

Block the brake chambers

Cage the spring parking brake system

14 / 30

If a failure occurs in the primary circuit, and a brake application is made, control air from the foot valve is directed to...

The secondary tank

Nowhere

The primary tank

A spring brake modulator valve

15 / 30

When the ABS starts working, what should you do?

Hold the pressure

Gradually apply more pressure to the foot valve

Release the pressure and let the system do its job

Start pumping the brakes

16 / 30

A vehicle equipped with an air brake system with manual slack adjusters, is it possible to pump the brake pedal to compensate for brakes that are out of adjustment?

Yes

If there is enough air pressure in the service reservoir

Yes, provide the low air-pressure warning has not been activated

17 / 30

What is automatic traction control?

An electronic system that reduces wheel spin while braking to gain traction

An electronic system that monitors wheel spin on acceleration and uses controlled braking to gain traction

An electronic system that increases wheel spin with acceleration

An electronic system that stops wheel spin through controlled braking to gain traction

18 / 30

Are the old and new tractor and trailer systems fully interchangeable with regards to the tractor and trailer with spring parking brakes?

Yes

Only when the glad hands are opposite

Only with tandem trailers

19 / 30

Can tractors and trailers with or without ABS be connected to one another without affecting the operation of the ABS?

Provided the system only has one axle

Yes

Provided the trailers are within 10 years old

20 / 30

Can a trailer with a basic air brake system be towed by a tractor with a dual air brake system?

Provided the brake chambers are the same size

Yes

Only if the age of both vehicles match

21 / 30

The primary and secondary circuits are equipped with low air pressure warning devices, which are triggered by...

When the foot valve goes to the floor

A brake fade

A loss of brakes

The low air pressure indicator switch and reservoir air pressure gauges

22 / 30

How is electronic engine control activated?

All of the above

It is activated automatically by the ATC if all the wheels begin to slip

Engine power is increased to attain optimum tire-to-road traction without driver intervention

It is activated by the driver in the cab

23 / 30

When driving a vehicle with ABS, how does it have to be driven differently?

Must press the foot valve with more pressure

Drive it normally

Must press the foot valve with light pressure

Pump the brakes

24 / 30

When a brake application is made and the system detects a wheel locking-up, what happens?

The system adds more pressure to the brakes

The ECU sends a message to the ABS valves to release brake pressure on that particular wheel preventing lockup

All of the above

The system automatically moves the tooth wheel

25 / 30

When using an engine brake and you encounter a slippery road surface, the ABS will detect the wheel lockup and do what?

Cut the air flow to the brake chambers

Work with each other until the vehicle is stopped

Automatically turn off the engine brake until traction is regained

Automatically turn off the ABS and let the engine brake do its job

26 / 30

The ABS wheel sensors are located on a minimum of how many wheels?

Four sets

All sets

Two sets

Three sets

27 / 30

Does the air brake system remain the same with the addition of the ABS components?

Yes

The braking lag time in non-existent

There is a slightly longer lag time when applying the brakes

28 / 30

If the ABS detects a wheel locking-up during a brake application, what happens?

The system releases brake pressure to that wheel only

It causes all of the wheels to unlock

A warning light appears on the dash

It places that wheel in neutral

29 / 30

As the air pressure drops below 85psi, what will happen to the spring parking brakes?

They will apply application

They will release

None of these

The won't return to the full off position and will start to drag

30 / 30

Spring parking brakes with modulator valve serve how many purposes?

One

Four

Three

Two

Your score is

Air Brake Practice Test 07

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