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?

Brake fade

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.

2 / 30

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

Listening for warning signals

All of these

Feeling the brake response of the vehicle

Watching the gauges

3 / 30

What does a kPa stand for?

Kilopascal

Kilogram

Pressure per square inch

Kilometre

4 / 30

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

That the trailer supply valve is operating properly

That the push rod travel is within limitations on all chambers

That the glad hands and the lines are secure

All of these

5 / 30

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

More compressed, less

Warmer, less

Colder, less

Cleaner, less

6 / 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

Spring brakes, compressor

Service brakes, mounting bolts

Clevis, pin

7 / 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

8 / 30

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

Disconnect supply (emergency) line glad hand

Release the spring parking brake

Disconnect control (service) line glad hand

Make full brake application

9 / 30

What absorbs the heat produced by friction?

Treadle

Brake lining

Metal brake drums

Diaphragm

10 / 30

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

Causes the limiting valve to operate

Engine power is reduced

Brakes applied and released up to five times a second

Air from the trailer reservoir released to the brake chambers.

11 / 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

12 / 30

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

Release the brakes quicker when a brake application is released.

Reducing the braking effort to the front wheels

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

Discharging the application air near the brake chambers

13 / 30

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

Applies

Coils

Decompresses

Cages

14 / 30

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

Three

Two

One

Four

15 / 30

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

S-cam

Push rod

Slack adjuster

Clevis and pin

16 / 30

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

Owner's

Mechanic's

Driver's

Technician's

17 / 30

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

Relay valve

Compressor

Trailer spring parking brake valve

Front and rear service reservoirs

18 / 30

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

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

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

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

Uses controlled braking to gain traction

19 / 30

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

Caged

Compressed

Canned

Contained

20 / 30

Friction produces what?

Heat

Air pressure

Convection

Lubrication

21 / 30

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

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

Decrease the vehicle weight

Gain a mechanical advantage

Increase stopping distance

22 / 30

What is the best way to avoid major breakdowns?

Verifying the system is at full pressure

Preventative maintenance

Listening for audible air leaks

Watching the dash gauges

23 / 30

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

Tooth wheel

Wheel sensor

Electronic control unit

ABS valves

24 / 30

What are the two most common slack adjuster problems?

Excessive premature wear and internal contamination.

Seized shoe anchors, lining wear

Lining wear, excessive moisture

Oversize drums, internal contamination

25 / 30

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

Allows the air to flow in one direction only

Automatically exhausts moisture from the reservoir when required

Transmits force in an air brake system

Holds a supply of compressed air

26 / 30

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

Width, friction

Diameter, friction

Thickness, heat

Strength, force

27 / 30

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

Motion, mechanical

Heat, mechanical

Mechanical, heat

Friction, Heat

28 / 30

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

Diaphragm

Slack adjuster

Mounting bolt

Push rod

29 / 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.

Eight

Ten

Four

Two

30 / 30

Braking distance is defined as:

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

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

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

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

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.