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 does fading or reduction in braking effort occur?

When the driver fails to apply the brakes correctly

When the brakes rarely get used

When the heated drums expand away from the brake linings

When parts of the brake pads break off

2 / 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...

90°

75°

80°

60°

3 / 30

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

The primary tank

The bottom of the foot valve

The supply tank

The secondary tank

4 / 30

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

Reset the system and take it to the shop for adjustments

Add it to the pre-trip inspection

Stop the vehicle and find the cause of the air loss

Turn it off

5 / 30

Why are air-over hydraulic brake systems used?

They are smaller in size

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

They are easier to maintain

They are easier to install

6 / 30

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

Just visual

Audible only

Vibration

Visual and audible

7 / 30

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

Cool air

A number of full brake applications

Nothing

Light braking applications

8 / 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

65 psi

45 psi

75 psi

9 / 30

Manual adjustment of wedge brakes is usually done by whom?

The driver

A qualified mechanic

The company owner

The vehicle owner

10 / 30

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

The head of maintenance

The driver

The carrier

The owner

11 / 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 compressor

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

To prevent air from leaving the brake chambers

12 / 30

What is not one of the types of brake systems?

Hydraulic brakes

Cable brakes

Wedge brakes

Air-over hydraulic brakes

13 / 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 1/4° to 1/2° a turn

Normally 5/8° a turn

Normally 3/4° a turn

Normally 1/16° to 1/8° a turn

14 / 30

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

The s-cams can be removed

They force the brake shoes against the drums

None of these

They remove the brake shoes from against the drums

15 / 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

16 / 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 steering action

None of these

Because of the manufacturer

17 / 30

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

Vacuum-assisted brakes

A full air brake system

Hydraulic brakes

Nothing

18 / 30

Do automatic slack adjusters have to be checked?

Yes

Only if inspected

Only if brake fade has happened

19 / 30

Where is the one-way check valve installed?

Beside the compressor

Between the reservoirs

Under the foot valve

Beside the governor

20 / 30

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

By manually checking each tank

By testing the brakes periodically

None of these

Through an air pressure gauge

21 / 30

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

The thickness of the drums

The age of the brakes

The amount of times the brakes are applied

The thickness of the brake pads

22 / 30

Where is a relay valve installed?

Under the foot valve

Near the rear brake chambers

Near the front brake chambers

Inside the rear wheel hubs

23 / 30

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

Deformed brackets

Improper installation

Inadequate maintenance

Straight push rods

24 / 30

What is the stop light switch?

It controls the traffic lights for fire trucks

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

It controls the trailers

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

25 / 30

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

A two-way valve

A safety valve

A one-way valve

A quick release valve

26 / 30

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

Zig zag

Wig mag

Wig wag

Mig mag

27 / 30

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

Improper lining

Weak return springs

Distorted drums

Smooth brake lining

28 / 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

29 / 30

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

A control line

Safety line

A supply line

Anti-compound line

30 / 30

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

Air-boost hydraulic brake system

Air actuated hydraulic brake system

They all need one

Air-over hydraulic brake system

Your score is

Air Brake Practice Test 03

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