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

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

The carrier

The owner

The driver

The head of maintenance

2 / 30

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

Because of the size of the front brakes

Because of the manufacturer

Because of the steering action

None of these

3 / 30

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

Turn it off

Reset the system and take it to the shop for adjustments

Stop the vehicle and find the cause of the air loss

Add it to the pre-trip inspection

4 / 30

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

The primary tank

The secondary tank

The bottom of the foot valve

The supply tank

5 / 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

6 / 30

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

Anti-compound line

A control line

Safety line

A supply line

7 / 30

What is not one of the types of brake systems?

Air-over hydraulic brakes

Wedge brakes

Hydraulic brakes

Cable brakes

8 / 30

When does fading or reduction in braking effort occur?

When parts of the brake pads break off

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

9 / 30

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

Air actuated hydraulic brake system

Air-over hydraulic brake system

They all need one

Air-boost hydraulic brake system

10 / 30

Do automatic slack adjusters have to be checked?

Yes

Only if brake fade has happened

Only if inspected

11 / 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 5/8° a turn

Normally 3/4° a turn

Normally 1/16° to 1/8° a turn

Normally 1/4° to 1/2° a turn

12 / 30

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

None of these

They force the brake shoes against the drums

The s-cams can be removed

They remove the brake shoes from against the drums

13 / 30

Where is a relay valve installed?

Under the foot valve

Inside the rear wheel hubs

Near the rear brake chambers

Near the front brake chambers

14 / 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°

90°

75°

60°

15 / 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

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

They were cheaper to maintain

16 / 30

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

Mig mag

Wig mag

Wig wag

Zig zag

17 / 30

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

A one-way valve

A quick release valve

A safety valve

A two-way valve

18 / 30

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

To prevent air from leaving the brake lines

To prevent air from leaving the brake chambers

To prevent air from leaving the compressor

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

19 / 30

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

Deformed brackets

Straight push rods

Inadequate maintenance

Improper installation

20 / 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 thickness of the drums

The amount of times the brakes are applied

The age of the brakes

21 / 30

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

Nothing

Light braking applications

Cool air

A number of full brake applications

22 / 30

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

Through an air pressure gauge

By testing the brakes periodically

None of these

By manually checking each tank

23 / 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 trailers

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

It controls the traffic lights for fire trucks

24 / 30

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

Improper lining

Distorted drums

Smooth brake lining

Weak return springs

25 / 30

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

Vacuum-assisted brakes

Nothing

Hydraulic brakes

A full air brake system

26 / 30

Manual adjustment of wedge brakes is usually done by whom?

The vehicle owner

The company owner

A qualified mechanic

The driver

27 / 30

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

Vibration

Visual and audible

Just visual

Audible only

28 / 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?

75 psi

45 psi

55 psi

65 psi

29 / 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

Yes

Only for firetrucks

30 / 30

Where is the one-way check valve installed?

Under the foot valve

Beside the governor

Between the reservoirs

Beside the compressor

Your score is

Air Brake Practice Test 03

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