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

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

Straight push rods

Deformed brackets

Inadequate maintenance

Improper installation

2 / 30

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

The amount of times the brakes are applied

The age of the brakes

The thickness of the drums

The thickness of the brake pads

3 / 30

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

Just visual

Vibration

Audible only

Visual and audible

4 / 30

What is not one of the types of brake systems?

Hydraulic brakes

Air-over hydraulic brakes

Wedge brakes

Cable brakes

5 / 30

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

Hydraulic brakes

A full air brake system

Nothing

Vacuum-assisted brakes

6 / 30

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

Wig mag

Zig zag

Mig mag

Wig wag

7 / 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

Stop the vehicle and find the cause of the air loss

Add it to the pre-trip inspection

Turn it off

8 / 30

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

None of these

Because of the steering action

Because of the size of the front brakes

Because of the manufacturer

9 / 30

Do automatic slack adjusters have to be checked?

Only if brake fade has happened

Only if inspected

Yes

10 / 30

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

Air-boost hydraulic brake system

Air-over hydraulic brake system

Air actuated hydraulic brake system

They all need one

11 / 30

Where is a relay valve installed?

Inside the rear wheel hubs

Near the front brake chambers

Under the foot valve

Near the rear brake chambers

12 / 30

What is the stop light switch?

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 traffic lights for fire trucks

It controls the trailers

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 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

14 / 30

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

A supply line

Safety line

A control line

Anti-compound line

15 / 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 two-way valve

A quick release valve

A one-way valve

16 / 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

17 / 30

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

Medium weight vehicles do not require a full airbrake system

It gives the option of pulling an air brake equipped trailer

They were cheaper to maintain

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

18 / 30

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

By manually checking each tank

Through an air pressure gauge

None of these

By testing the brakes periodically

19 / 30

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

They remove the brake shoes from against the drums

They force the brake shoes against the drums

The s-cams can be removed

None of these

20 / 30

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

The secondary tank

The supply tank

The primary tank

The bottom of the foot valve

21 / 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 leaving the brake chambers

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

22 / 30

Where is the one-way check valve installed?

Beside the governor

Beside the compressor

Under the foot valve

Between the reservoirs

23 / 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°

60°

90°

75°

24 / 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 parts of the brake pads break off

When the heated drums expand away from the brake linings

25 / 30

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

Smooth brake lining

Distorted drums

Improper lining

Weak return springs

26 / 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

27 / 30

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

Light braking applications

A number of full brake applications

Nothing

Cool air

28 / 30

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

The driver

The owner

The carrier

The head of maintenance

29 / 30

Why are air-over hydraulic brake systems used?

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

They are smaller in size

They are easier to install

They are easier to maintain

30 / 30

Manual adjustment of wedge brakes is usually done by whom?

A qualified mechanic

The vehicle owner

The driver

The company owner

Your score is

Air Brake Practice Test 03

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