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 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

2 / 30

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

The driver

The owner

The carrier

The head of maintenance

3 / 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

55 psi

65 psi

45 psi

4 / 30

Where is a relay valve installed?

Under the foot valve

Inside the rear wheel hubs

Near the front brake chambers

Near the rear brake chambers

5 / 30

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

They force the brake shoes against the drums

They remove the brake shoes from against the drums

The s-cams can be removed

None of these

6 / 30

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

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

They were cheaper to maintain

It gives the option of pulling an air brake equipped trailer

Medium weight vehicles do not require a full airbrake system

7 / 30

Why are air-over hydraulic brake systems used?

They are smaller in size

They are easier to maintain

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

They are easier to install

8 / 30

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

Mig mag

Zig zag

Wig wag

Wig mag

9 / 30

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

Safety line

A control line

A supply line

Anti-compound line

10 / 30

What is the stop light switch?

It controls the traffic lights for fire trucks

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

It controls the trailers

11 / 30

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

By manually checking each tank

None of these

By testing the brakes periodically

Through an air pressure gauge

12 / 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

13 / 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

14 / 30

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

Only for firetrucks

Yes

It can be installed on the trailers

15 / 30

When does fading or reduction in braking effort occur?

When the brakes rarely get used

When the driver fails to apply the brakes correctly

When parts of the brake pads break off

When the heated drums expand away from the brake linings

16 / 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 leaving the compressor

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

17 / 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 5/8° a turn

Normally 1/16° to 1/8° a turn

Normally 1/4° to 1/2° a turn

18 / 30

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

Turn it off

Add it to the pre-trip inspection

Reset the system and take it to the shop for adjustments

Stop the vehicle and find the cause of the air loss

19 / 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°

60°

90°

20 / 30

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

A number of full brake applications

Light braking applications

Nothing

Cool air

21 / 30

Do automatic slack adjusters have to be checked?

Yes

Only if inspected

Only if brake fade has happened

22 / 30

What is not one of the types of brake systems?

Cable brakes

Air-over hydraulic brakes

Hydraulic brakes

Wedge brakes

23 / 30

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

The thickness of the drums

The thickness of the brake pads

The age of the brakes

The amount of times the brakes are applied

24 / 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 two-way valve

A safety valve

A quick release valve

25 / 30

Where is the one-way check valve installed?

Under the foot valve

Beside the governor

Beside the compressor

Between the reservoirs

26 / 30

Manual adjustment of wedge brakes is usually done by whom?

The driver

A qualified mechanic

The company owner

The vehicle owner

27 / 30

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

Nothing

A full air brake system

Vacuum-assisted brakes

Hydraulic brakes

28 / 30

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

Smooth brake lining

Weak return springs

Distorted drums

Improper lining

29 / 30

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

Audible only

Vibration

Visual and audible

Just visual

30 / 30

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

Straight push rods

Improper installation

Deformed brackets

Inadequate maintenance

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Air Brake Practice Test 03

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