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

Why are air-over hydraulic brake systems used?

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

They are easier to maintain

They are smaller in size

They are easier to install

2 / 30

When does fading or reduction in braking effort occur?

When the brakes rarely get used

When the heated drums expand away from the brake linings

When parts of the brake pads break off

When the driver fails to apply the brakes correctly

3 / 30

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

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

Add it to the pre-trip inspection

4 / 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

5 / 30

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

Air-over hydraulic brake system

They all need one

Air-boost hydraulic brake system

Air actuated hydraulic brake system

6 / 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

55 psi

45 psi

75 psi

7 / 30

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

Wig wag

Mig mag

Zig zag

Wig mag

8 / 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

9 / 30

Do automatic slack adjusters have to be checked?

Yes

Only if brake fade has happened

Only if inspected

10 / 30

What is the stop light switch?

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

It controls the traffic lights for fire trucks

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

11 / 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°

90°

80°

75°

12 / 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

None of these

Because of the manufacturer

Because of the steering action

13 / 30

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

Vacuum-assisted brakes

Hydraulic brakes

A full air brake system

Nothing

14 / 30

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

The head of maintenance

The owner

The carrier

The driver

15 / 30

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

By testing the brakes periodically

By manually checking each tank

None of these

Through an air pressure gauge

16 / 30

Manual adjustment of wedge brakes is usually done by whom?

A qualified mechanic

The driver

The vehicle owner

The company owner

17 / 30

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

Improper lining

Distorted drums

Weak return springs

Smooth brake lining

18 / 30

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

Cool air

Light braking applications

Nothing

A number of full brake applications

19 / 30

Where is the one-way check valve installed?

Between the reservoirs

Beside the compressor

Under the foot valve

Beside the governor

20 / 30

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

Anti-compound line

A control line

Safety line

A supply line

21 / 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

22 / 30

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

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

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

23 / 30

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

The secondary tank

The bottom of the foot valve

The supply tank

The primary tank

24 / 30

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

None of these

They force the brake shoes against the drums

They remove the brake shoes from against the drums

The s-cams can be removed

25 / 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 1/4° to 1/2° a turn

Normally 3/4° a turn

Normally 1/16° to 1/8° a turn

26 / 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 one-way valve

A two-way valve

A safety valve

27 / 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

28 / 30

What is not one of the types of brake systems?

Air-over hydraulic brakes

Wedge brakes

Hydraulic brakes

Cable brakes

29 / 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 age of the brakes

The amount of times the brakes are applied

The thickness of the drums

30 / 30

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

Visual and audible

Vibration

Audible only

Just visual

Your score is

By WordPress Quiz plugin

Air Brake Practice Test 03

About

Practice Tests

Getting a License

Get In Touch