NOVA SCOTIA AIR BRAKE KNOWLEDGE TEST 04

In Nova Scotia, Canada, air brakes are an essential feature of commercial vehicles, especially those carrying heavy loads.

Air Brake Test 04

1 / 30

What will a tractor protection valve with a broken return spring cause?

Loss of air during normal brake applications if operating the tractor without a trailer.

Brake fade

The brake drum to crack or warp.

An emergency brake application on the trailer until a brake application was made

2 / 30

What is a reason a medium sized vehicle would use air over hydraulic brakes?

Gain a mechanical advantage

Decrease the vehicle weight

Increase stopping distance

It gives the option of pulling an air brake equipped trailer.

3 / 30

What does a kPa stand for?

Kilometre

Kilogram

Kilopascal

Pressure per square inch

4 / 30

A vehicle carrying a load of 20,000 kg at 20 km/h is brought to a stop in 45 metres with normal application of the brakes. If this same vehicle carried 40,000 kg at 40 km/h, it would require ____ times the braking force to stop the vehicle in 45 metres.

Two

Four

Eight

Ten

5 / 30

What absorbs the heat produced by friction?

Metal brake drums

Brake lining

Diaphragm

Treadle

6 / 30

A brake chamber is a circular container divided in the middle by a flexible ________.

Mounting bolt

Push rod

Slack adjuster

Diaphragm

7 / 30

On spring brake systems, during full brake application, compounding of the force applied on the slack adjusters and linkage can be said to be a combination of two forces: the force applied by the _________ and the _________.

Spring brakes, compressor

Clevis, pin

Service brakes, mounting bolts

Spring brakes, service brakes

8 / 30

The _______ adjusts the free play in the linkage between the push rod and the brake shoes.

Clevis and pin

Push rod

Slack adjuster

S-cam

9 / 30

What methods can the driver use to stay aware of the condition of the vehicle's braking system?

Feeling the brake response of the vehicle

Listening for warning signals

Watching the gauges

All of these

10 / 30

Braking distance is defined as:

A combination of driver's reaction time, brake lag, and stopping distance

The time it takes from the moment a hazard is recognized to the time the brake is applied,

The time it takes the air to travel through a properly maintained air brake system

The actual distance the vehicle travels after the brake is applied until the vehicle stops

11 / 30

What is the best way to avoid major breakdowns?

Watching the dash gauges

Listening for audible air leaks

Preventative maintenance

Verifying the system is at full pressure

12 / 30

Normally on an S-cam brake with automatic slack adjustment, ________ brake applications of ________ psi per day will keep the brakes properly adjusted.

Two, 80-100

Two to four, 80-100

One, 100-120

Three to five, 40-70

13 / 30

What is the function of a 'spitter' valve on a reservoir?

Automatically exhausts moisture from the reservoir when required

Allows the air to flow in one direction only

Transmits force in an air brake system

Holds a supply of compressed air

14 / 30

Which of the following is considered the 'brain' of an anti-lock braking system?

Electronic control unit

Tooth wheel

ABS valves

Wheel sensor

15 / 30

Ultimately, it is the _______ responsibility to ensure that brakes are adjusted correctly.

Owner's

Mechanic's

Driver's

Technician's

16 / 30

A relay valve has two uses. Which of the following is one of them?

Connecting the control (service) and supply (emergency) lines of the trailer to the tractor

Reducing the braking effort to the front wheels

Discharging the application air near the brake chambers

Release the brakes quicker when a brake application is released.

17 / 30

Which of the following is NOT true about automatic traction control?

Uses controlled braking to gain traction

Improves the ability of the driver to manoeuvre the vehicle on slippery surfaces

Monitors wheel speed at all times and controls wheel speed while braking

The system uses two functions: differential braking and electronic engine control

18 / 30

The amount of force available at the push rod is consistent out to ____ inches of stroke.

One

Four

Two

Three

19 / 30

The ________ the air supply is kept, the ______ chance of brake problems.

More compressed, less

Cleaner, less

Colder, less

Warmer, less

20 / 30

Which of the following is NOT a component of a spring parking brake system?

Compressor

Front and rear service reservoirs

Trailer spring parking brake valve

Relay valve

21 / 30

The ________ of the drum brakes determines the amount of _____ they are able to absorb and dissipate into the atmosphere.

Width, friction

Strength, force

Thickness, heat

Diameter, friction

22 / 30

For a vehicle to move along the highway, an internal combustion engine must convert its _____ energy into ______ energy.

Friction, Heat

Heat, mechanical

Mechanical, heat

Motion, mechanical

23 / 30

The electronic engine control is activated automatically by the ATC if all the wheels begin to slip. What effect does this have?

Brakes applied and released up to five times a second

Causes the limiting valve to operate

Air from the trailer reservoir released to the brake chambers.

Engine power is reduced

24 / 30

What are the two most common slack adjuster problems?

Oversize drums, internal contamination

Excessive premature wear and internal contamination.

Lining wear, excessive moisture

Seized shoe anchors, lining wear

25 / 30

On a combination vehicle, what is the first step in a tractor protection valve check?

Make full brake application

Release the spring parking brake

Disconnect supply (emergency) line glad hand

Disconnect control (service) line glad hand

26 / 30

On spring operated parking brakes, during normal operation, air pressure _________ the spring, holding it ready for parking or emergency braking.

Coils

Applies

Decompresses

Cages

27 / 30

At a truck stop before a downgrade, what needs to be checked before continuing to drive?

That the glad hands and the lines are secure

All of these

That the trailer supply valve is operating properly

That the push rod travel is within limitations on all chambers

28 / 30

Friction produces what?

Convection

Lubrication

Heat

Air pressure

29 / 30

Air that is squeezed into a much smaller space than it normally would occupy is said to be ________.

Canned

Contained

Caged

Compressed

30 / 30

Which of the following is NOT a component of an air brake system?

A compressor

Spring parking brake chambers

A governor

A foot valve

Your score is

Air brakes are governed by the Nova Scotia Motor Vehicle Act and Regulations, which stipulate that every commercial vehicle equipped with air brakes must have an air brake endorsement on the driver’s license. Additionally, every driver operating a commercial vehicle with air brakes must undergo an air brake knowledge and practical test to acquire the endorsement. The air brake test evaluates a driver’s knowledge of air brake components, operation, maintenance, and safety precautions. Commercial vehicle owners and operators in Nova Scotia must also ensure that their air brake systems are adequately maintained and inspected regularly to prevent accidents caused by faulty brakes. The province has stringent regulations for air brake systems, and failure to comply can result in hefty fines or the revocation of operating licenses. With these regulations in place, Nova Scotians can trust that commercial vehicles on their roads have well-maintained and properly functioning air brake systems.

Before learning to drive a Class 1, Class 2, Class 3, or Class 4 vehicle, you must get authorized instruction in the class of vehicle you want to be licensed in. For each section of these practice tests, we have multiple practice tests. Requirements for Air Brake Endorsement are 1) Must complete an Air Brake Written Test 2) Must complete an Air Brake Practical Test.

To successfully prepare, consider utilizing these exams and the official Nova Scotia Air Brake Manual to your advantage. The more knowledge you can attain, the better it will be for you once you return to the SNB office to take the air brake license written knowledge test.