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

Where is a relay valve installed?

Under the foot valve

Near the front brake chambers

Near the rear brake chambers

Inside the rear wheel hubs

2 / 30

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

Air-boost hydraulic brake system

They all need one

Air-over hydraulic brake system

Air actuated hydraulic brake system

3 / 30

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

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

To prevent air from leaving the brake chambers

To prevent air from leaving the compressor

To prevent air from leaving the brake lines

4 / 30

When does fading or reduction in braking effort occur?

When parts of the brake pads break off

When the brakes rarely get used

When the heated drums expand away from the brake linings

When the driver fails to apply the brakes correctly

5 / 30

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

A supply line

Safety line

Anti-compound line

A control line

6 / 30

Where is the one-way check valve installed?

Between the reservoirs

Under the foot valve

Beside the compressor

Beside the governor

7 / 30

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

Just visual

Vibration

Audible only

Visual and audible

8 / 30

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

Because of the steering action

Because of the size of the front brakes

Because of the manufacturer

None of these

9 / 30

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

Yes

It can be installed on the trailers

Only for firetrucks

10 / 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...

75°

90°

60°

80°

11 / 30

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

Straight push rods

Inadequate maintenance

Improper installation

Deformed brackets

12 / 30

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

Hydraulic brakes

Vacuum-assisted brakes

Nothing

A full air brake system

13 / 30

Manual adjustment of wedge brakes is usually done by whom?

The vehicle owner

A qualified mechanic

The driver

The company owner

14 / 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?

45 psi

55 psi

75 psi

65 psi

15 / 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 1/4° to 1/2° a turn

Normally 5/8° a turn

Normally 1/16° to 1/8° a turn

16 / 30

Do automatic slack adjusters have to be checked?

Only if brake fade has happened

Only if inspected

Yes

17 / 30

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

Wig wag

Zig zag

Wig mag

Mig mag

18 / 30

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

Distorted drums

Weak return springs

Improper lining

Smooth brake lining

19 / 30

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

A quick release valve

A safety valve

A one-way valve

A two-way valve

20 / 30

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

The driver

The carrier

The owner

The head of maintenance

21 / 30

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

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

Turn it off

22 / 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

They were cheaper to maintain

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

23 / 30

What is the stop light switch?

It controls the trailers

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

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

24 / 30

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

Light braking applications

Nothing

Cool air

A number of full brake applications

25 / 30

What is not one of the types of brake systems?

Cable brakes

Hydraulic brakes

Wedge brakes

Air-over hydraulic brakes

26 / 30

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

The primary tank

The supply tank

The secondary tank

The bottom of the foot valve

27 / 30

Why are air-over hydraulic brake systems used?

They are easier to install

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

They are easier to maintain

They are smaller in size

28 / 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 amount of times the brakes are applied

The age of the brakes

The thickness of the drums

29 / 30

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

The s-cams can be removed

They remove the brake shoes from against the drums

None of these

They force the brake shoes against the drums

30 / 30

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

None of these

By manually checking each tank

By testing the brakes periodically

Through an air pressure gauge

Your score is

Air Brake Practice Test 03

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