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

Friction produces what?

Heat

Convection

Lubrication

Air pressure

2 / 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

One, 100-120

Two to four, 80-100

Three to five, 40-70

3 / 30

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

Driver's

Mechanic's

Owner's

Technician's

4 / 30

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

Canned

Contained

Compressed

Caged

5 / 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

Spring brakes, service brakes

Service brakes, mounting bolts

Clevis, pin

6 / 30

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

Compressor

Relay valve

Trailer spring parking brake valve

Front and rear service reservoirs

7 / 30

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

Applies

Decompresses

Cages

Coils

8 / 30

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

Mounting bolt

Diaphragm

Slack adjuster

Push rod

9 / 30

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

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

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

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

Uses controlled braking to gain traction

10 / 30

What does a kPa stand for?

Kilopascal

Kilogram

Pressure per square inch

Kilometre

11 / 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.

Ten

Four

Two

Eight

12 / 30

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

Width, friction

Thickness, heat

Diameter, friction

Strength, force

13 / 30

What are the two most common slack adjuster problems?

Excessive premature wear and internal contamination.

Oversize drums, internal contamination

Seized shoe anchors, lining wear

Lining wear, excessive moisture

14 / 30

Braking distance is defined as:

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

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

15 / 30

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

Listening for warning signals

Feeling the brake response of the vehicle

Watching the gauges

All of these

16 / 30

What absorbs the heat produced by friction?

Metal brake drums

Brake lining

Diaphragm

Treadle

17 / 30

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

Disconnect supply (emergency) line glad hand

Make full brake application

Release the spring parking brake

Disconnect control (service) line glad hand

18 / 30

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

Air from the trailer reservoir released to the brake chambers.

Brakes applied and released up to five times a second

Causes the limiting valve to operate

Engine power is reduced

19 / 30

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

Two

Three

One

Four

20 / 30

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

Mechanical, heat

Friction, Heat

Heat, mechanical

Motion, mechanical

21 / 30

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

Decrease the vehicle weight

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

Increase stopping distance

Gain a mechanical advantage

22 / 30

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

More compressed, less

Warmer, less

Cleaner, less

Colder, less

23 / 30

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

Slack adjuster

Push rod

Clevis and pin

S-cam

24 / 30

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

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

The brake drum to crack or warp.

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

Brake fade

25 / 30

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

ABS valves

Tooth wheel

Wheel sensor

Electronic control unit

26 / 30

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

Discharging the application air near the brake chambers

Reducing the braking effort to the front wheels

Release the brakes quicker when a brake application is released.

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

27 / 30

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

Holds a supply of compressed air

Transmits force in an air brake system

Automatically exhausts moisture from the reservoir when required

Allows the air to flow in one direction only

28 / 30

What is the best way to avoid major breakdowns?

Verifying the system is at full pressure

Preventative maintenance

Watching the dash gauges

Listening for audible air leaks

29 / 30

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

Spring parking brake chambers

A governor

A foot valve

A compressor

30 / 30

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

All of these

That the push rod travel is within limitations on all chambers

That the trailer supply valve is operating properly

That the glad hands and the lines are secure

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.