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

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

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

They will apply application

They will release

None of these

2 / 30

How does differential braking occur?

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

None of these

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

3 / 30

How is electronic engine control activated?

All of the above

It is activated by the driver in the cab

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

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

Yes

If there is enough air pressure in the service reservoir

5 / 30

Spring parking brakes with modulator valve serve how many purposes?

Four

Three

Two

One

6 / 30

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

On the trailer's right rear corner

On the trailer's right front corner

On the trailer's left rear corner

On the trailer's left front corner

7 / 30

How is the driver informed when wheel slip is detected?

A warning light is located on the dash

Nothing warns the driver

A wig wag drops in front of the driver

A warning buzzer is activated

8 / 30

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

Only with tandem trailers

Only when the glad hands are opposite

Yes

9 / 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)

10 / 30

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

Yes

There is a slightly longer lag time when applying the brakes

The braking lag time in non-existent

11 / 30

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

Drive it normally

Pump the brakes

Must press the foot valve with light pressure

Must press the foot valve with more pressure

12 / 30

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

20 psi

35 psi

25 psi

30 psi

13 / 30

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

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

The system automatically moves the tooth wheel

The system adds more pressure to the brakes

All of the above

14 / 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

The low air pressure indicator switch and reservoir air pressure gauges

A loss of brakes

A brake fade

15 / 30

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

Yes

Only Class 3 vehicles

Only those with ABS

Only those which may tow trailers

16 / 30

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

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

None of these

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

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

17 / 30

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

Two sets

All sets

Three sets

Four sets

18 / 30

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

Provided the trailers are within 10 years old

Yes

Provided the system only has one axle

19 / 30

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

It causes all of the wheels to unlock

It places that wheel in neutral

The system releases brake pressure to that wheel only

A warning light appears on the dash

20 / 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

A spring brake modulator valve

The primary tank

Nowhere

21 / 30

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

The hydraulic brake system

The air brake system

The park brake system

The ABS system

22 / 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

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

None of these

The compressor to re-fill the tanks

23 / 30

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

Compressed air

Blended air

Exhausted air

Wet air

24 / 30

Brake applications can be repeated until...

The foot valve gets stiff

The brakes heat up

The wheels lock

All the air from the secondary circuit is lost

25 / 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

Only if the age of both vehicles match

Yes

26 / 30

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

Work with each other until the vehicle is stopped

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

Cut the air flow to the brake chambers

Automatically turn off the engine brake until traction is regained

27 / 30

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

Cage the spring parking brake system

Recharge the system

Block the brake chambers

Repair the damaged circuit

28 / 30

When the ABS starts working, what should you do?

Gradually apply more pressure to the foot valve

Start pumping the brakes

Release the pressure and let the system do its job

Hold the pressure

29 / 30

What is automatic traction control?

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

An electronic system that stops wheel spin through controlled 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

30 / 30

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

The ATC works with cruise control to stop the vehicle

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

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

The ATC will automatically cancel the cruise control setting

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Air Brake Practice Test 07

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