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

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

Light braking applications

A number of full brake applications

Cool air

Nothing

2 / 30

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

Because of the manufacturer

Because of the size of the front brakes

None of these

Because of the steering action

3 / 30

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

The bottom of the foot valve

The supply tank

The primary tank

The secondary tank

4 / 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 1/16° to 1/8° a turn

Normally 1/4° to 1/2° a turn

Normally 3/4° a turn

5 / 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

6 / 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

7 / 30

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

The age of the brakes

The thickness of the drums

The thickness of the brake pads

The amount of times the brakes are applied

8 / 30

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

By manually checking each tank

By testing the brakes periodically

Through an air pressure gauge

None of these

9 / 30

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

The head of maintenance

The driver

The carrier

The owner

10 / 30

Why are air-over hydraulic brake systems used?

They are smaller in size

They are easier to install

They are easier to maintain

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

11 / 30

When does fading or reduction in braking effort occur?

When the driver fails to apply the brakes correctly

When the heated drums expand away from the brake linings

When the brakes rarely get used

When parts of the brake pads break off

12 / 30

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

Yes

Only for firetrucks

It can be installed on the trailers

13 / 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'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

14 / 30

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

Add it to the pre-trip inspection

Turn it off

Stop the vehicle and find the cause of the air loss

Reset the system and take it to the shop for adjustments

15 / 30

Where is the one-way check valve installed?

Between the reservoirs

Under the foot valve

Beside the governor

Beside the compressor

16 / 30

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

Wig wag

Zig zag

Mig mag

Wig mag

17 / 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?

65 psi

45 psi

55 psi

75 psi

18 / 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...

60°

80°

75°

90°

19 / 30

What is not one of the types of brake systems?

Cable brakes

Air-over hydraulic brakes

Hydraulic brakes

Wedge brakes

20 / 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

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

Medium weight vehicles do not require a full airbrake system

They were cheaper to maintain

21 / 30

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

Nothing

Vacuum-assisted brakes

Hydraulic brakes

A full air brake system

22 / 30

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

Visual and audible

Just visual

Vibration

Audible only

23 / 30

Do automatic slack adjusters have to be checked?

Yes

Only if brake fade has happened

Only if inspected

24 / 30

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

Air actuated hydraulic brake system

They all need one

Air-boost hydraulic brake system

Air-over hydraulic brake system

25 / 30

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

Anti-compound line

Safety line

A control line

A supply line

26 / 30

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

The s-cams can be removed

None of these

They remove the brake shoes from against the drums

They force the brake shoes against the drums

27 / 30

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

To prevent air from leaving the brake chambers

To prevent air from leaving the brake lines

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

To prevent air from leaving the compressor

28 / 30

Manual adjustment of wedge brakes is usually done by whom?

The company owner

A qualified mechanic

The vehicle owner

The driver

29 / 30

Where is a relay valve installed?

Near the front brake chambers

Under the foot valve

Near the rear brake chambers

Inside the rear wheel hubs

30 / 30

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

Improper lining

Weak return springs

Smooth brake lining

Distorted drums

Your score is

Air Brake Practice Test 03

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