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

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

Compressor

Front and rear service reservoirs

Relay valve

Trailer spring parking brake valve

2 / 30

What absorbs the heat produced by friction?

Treadle

Metal brake drums

Brake lining

Diaphragm

3 / 30

Friction produces what?

Heat

Convection

Lubrication

Air pressure

4 / 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

Release the brakes quicker when a brake application is released.

Discharging the application air near the brake chambers

Reducing the braking effort to the front wheels

5 / 30

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

Cages

Coils

Applies

Decompresses

6 / 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.

Engine power is reduced

Causes the limiting valve to operate

Brakes applied and released up to five times a second

7 / 30

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

Disconnect control (service) line glad hand

Release the spring parking brake

Disconnect supply (emergency) line glad hand

Make full brake application

8 / 30

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

Four

One

Two

Three

9 / 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.

Four

Ten

Two

Eight

10 / 30

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

Push rod

Slack adjuster

Diaphragm

Mounting bolt

11 / 30

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

Holds a supply of compressed air

Automatically exhausts moisture from the reservoir when required

Allows the air to flow in one direction only

Transmits force in an air brake system

12 / 30

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

All of these

Watching the gauges

Feeling the brake response of the vehicle

Listening for warning signals

13 / 30

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

S-cam

Clevis and pin

Push rod

Slack adjuster

14 / 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.

Brake fade

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

15 / 30

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

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

Uses controlled braking to gain traction

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

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

16 / 30

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

ABS valves

Tooth wheel

Wheel sensor

Electronic control unit

17 / 30

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

One, 100-120

Two to four, 80-100

Three to five, 40-70

Two, 80-100

18 / 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

19 / 30

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

All of these

That the glad hands and the lines are secure

That the push rod travel is within limitations on all chambers

That the trailer supply valve is operating properly

20 / 30

Braking distance is defined as:

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

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,

21 / 30

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

Cleaner, less

More compressed, less

Colder, less

Warmer, less

22 / 30

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

Strength, force

Width, friction

Diameter, friction

Thickness, heat

23 / 30

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

Heat, mechanical

Mechanical, heat

Motion, mechanical

Friction, Heat

24 / 30

What is the best way to avoid major breakdowns?

Watching the dash gauges

Verifying the system is at full pressure

Preventative maintenance

Listening for audible air leaks

25 / 30

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

Contained

Canned

Caged

Compressed

26 / 30

What does a kPa stand for?

Kilometre

Kilopascal

Pressure per square inch

Kilogram

27 / 30

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

A compressor

A foot valve

A governor

Spring parking brake chambers

28 / 30

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

Technician's

Owner's

Mechanic's

Driver's

29 / 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, service brakes

Service brakes, mounting bolts

Clevis, pin

Spring brakes, compressor

30 / 30

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

Gain a mechanical advantage

Decrease the vehicle weight

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

Increase stopping distance

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.