Air Brake Practice Test 03

Preparing for your Canadian air brake test can seem daunting, but taking the free Air Brake Practice Test can be an invaluable resource in helping you ace your official exam with flying colors. This practice test is designed to familiarize you with the official test format, giving you a better understanding of what to expect and helping to increase your confidence.

1 / 30

When the brakes are fully applied, the angle between the push rod and the arm of the slack adjuster should be no more than...

80°

75°

90°

60°

2 / 30

What determines the amount of heat the brakes are able to absorb and dissipate into the atmosphere?

The thickness of the brake pads

The amount of times the brakes are applied

The thickness of the drums

The age of the brakes

3 / 30

The air line from the foot valve to the relay valve now becomes what?

A supply line

Anti-compound line

Safety line

A control line

4 / 30

Where is a relay valve installed?

Under the foot valve

Near the rear brake chambers

Inside the rear wheel hubs

Near the front brake chambers

5 / 30

On manual slack adjusters, the adjusting worm bolt is turned until the brake linings touch the drums and then backed of how much?

Normally 3/4° a turn

Normally 1/16° to 1/8° a turn

Normally 1/4° to 1/2° a turn

Normally 5/8° a turn

6 / 30

What is the stop light switch?

It's an air-operated electric switch that turns on the brake lights at the rear of the vehicle when a brake application is being made

It controls the traffic lights for fire trucks

It controls the trailers

It's a switch that turns the brake lights off after application

7 / 30

Whose responsibility is it to ensure that brakes are adjusted correctly?

The owner

The carrier

The head of maintenance

The driver

8 / 30

What is another type of low-pressure warning device used on older vehicles?

Wig wag

Wig mag

Mig mag

Zig zag

9 / 30

Which statement is false? A number of factors could result in the automatic slack adjuster not maintaining proper slack, including...

Inadequate maintenance

Improper installation

Straight push rods

Deformed brackets

10 / 30

The governor controls the pressure in the reservoir to...

The supply tank

The primary tank

The bottom of the foot valve

The secondary tank

11 / 30

Can an additional gauge be installed on the dash to indicate the application air pressure when the brakes are applied?

It can be installed on the trailers

Only for firetrucks

Yes

12 / 30

Which statement is false? Air over hydraulic brake systems were developed for medium weight vehicles because...

It gives the option of pulling an air brake equipped trailer

Medium weight vehicles do not require a full airbrake system

They were cheaper to maintain

Diesel engines do not have a source for vacuum boosting unless they are equipped with a vacuum pump

13 / 30

Which air brake system does not require an air brake endorsement?

They all need one

Air actuated hydraulic brake system

Air-boost hydraulic brake system

Air-over hydraulic brake system

14 / 30

An air-boost hydraulic brake system is similar to what?

Nothing

A full air brake system

Hydraulic brakes

Vacuum-assisted brakes

15 / 30

What happens when the slack adjusters rotate the S-cams?

They force the brake shoes against the drums

None of these

They remove the brake shoes from against the drums

The s-cams can be removed

16 / 30

Do automatic slack adjusters have to be checked?

Only if brake fade has happened

Only if inspected

Yes

17 / 30

How do drivers monitor the air pressure in each of the tanks?

Through an air pressure gauge

By testing the brakes periodically

By manually checking each tank

None of these

18 / 30

The low-pressure warning device must be comprised of which systems?

Audible only

Just visual

Visual and audible

Vibration

19 / 30

Manual adjustment of wedge brakes is usually done by whom?

The driver

The company owner

The vehicle owner

A qualified mechanic

20 / 30

What may be required to keep the automatic brake adjusters in adjustment?

A number of full brake applications

Light braking applications

Cool air

Nothing

21 / 30

What is not one of the types of brake systems?

Air-over hydraulic brakes

Hydraulic brakes

Wedge brakes

Cable brakes

22 / 30

Whichever warning system is used, what must the driver do once it is activated?

Add it to the pre-trip inspection

Stop the vehicle and find the cause of the air loss

Turn it off

Reset the system and take it to the shop for adjustments

23 / 30

Which statement is false? Dangerously undependable brake performance will result from what?

Smooth brake lining

Improper lining

Weak return springs

Distorted drums

24 / 30

When does fading or reduction in braking effort occur?

When the heated drums expand away from the brake linings

When the brakes rarely get used

When the driver fails to apply the brakes correctly

When parts of the brake pads break off

25 / 30

What is required to allow the brakes to release quickly and fully by discharging the application air near the brake chambers?

A safety valve

A quick release valve

A one-way valve

A two-way valve

26 / 30

Why is a front axle assembly have the brake chamber and slack adjuster mounted on the backing-plate?

Because of the manufacturer

None of these

Because of the size of the front brakes

Because of the steering action

27 / 30

Where is the one-way check valve installed?

Between the reservoirs

Beside the governor

Beside the compressor

Under the foot valve

28 / 30

Why are air-over hydraulic brake systems used?

They combine the best features of an air and hydraulic brake system

They are easier to maintain

They are smaller in size

They are easier to install

29 / 30

What is the purpose of the one-way check valve?

To prevent air from leaving the compressor

To prevent air from flowing backwards in the system toward the compressor

To prevent air from leaving the brake lines

To prevent air from leaving the brake chambers

30 / 30

Due to over use or leaks, the low-pressure indicator switch will turn on a red warning light on the dash or cause a buzzer to sound at or before how much psi?

55 psi

75 psi

45 psi

65 psi

Your score is

Air Brake Practice Test 03

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