NEWFOUNDLAND AIR BRAKE PRACTICE TEST 04

Air brake systems are a crucial aspect of road safety in Newfoundland, Canada. These brakes are designed to slow, stop, and hold large vehicles or combinations of vehicles, such as tractor-trailers, buses, and heavy-duty trucks.

Air Brake Test 04

1 / 30

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

Slack adjuster

Diaphragm

Push rod

Mounting bolt

2 / 30

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

Three to five, 40-70

One, 100-120

Two, 80-100

Two to four, 80-100

3 / 30

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

Push rod

Clevis and pin

Slack adjuster

S-cam

4 / 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

5 / 30

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

Relay valve

Front and rear service reservoirs

Trailer spring parking brake valve

Compressor

6 / 30

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

Width, friction

Strength, force

Diameter, friction

Thickness, heat

7 / 30

Friction produces what?

Lubrication

Heat

Convection

Air pressure

8 / 30

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

Warmer, less

Cleaner, less

Colder, less

More compressed, less

9 / 30

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

Brake fade

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

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

The brake drum to crack or warp.

10 / 30

What does a kPa stand for?

Kilogram

Kilopascal

Pressure per square inch

Kilometre

11 / 30

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

A compressor

Spring parking brake chambers

A foot valve

A governor

12 / 30

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

Three

Two

One

Four

13 / 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

14 / 30

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

Gain a mechanical advantage

Increase stopping distance

Decrease the vehicle weight

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

15 / 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

Uses controlled braking to gain traction

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

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

16 / 30

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

Disconnect supply (emergency) line glad hand

Disconnect control (service) line glad hand

Make full brake application

Release the spring parking brake

17 / 30

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

Transmits force in an air brake system

Automatically exhausts moisture from the reservoir when required

Holds a supply of compressed air

Allows the air to flow in one direction only

18 / 30

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

Engine power is reduced

Air from the trailer reservoir released to the brake chambers.

Causes the limiting valve to operate

Brakes applied and released up to five times a second

19 / 30

What absorbs the heat produced by friction?

Diaphragm

Treadle

Brake lining

Metal brake drums

20 / 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,

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

21 / 30

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

Electronic control unit

Tooth wheel

Wheel sensor

ABS valves

22 / 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

23 / 30

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

Canned

Compressed

Caged

Contained

24 / 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

Clevis, pin

Service brakes, mounting bolts

25 / 30

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

Technician's

Owner's

Mechanic's

Driver's

26 / 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

27 / 30

What are the two most common slack adjuster problems?

Seized shoe anchors, lining wear

Lining wear, excessive moisture

Oversize drums, internal contamination

Excessive premature wear and internal contamination.

28 / 30

What is the best way to avoid major breakdowns?

Listening for audible air leaks

Verifying the system is at full pressure

Preventative maintenance

Watching the dash gauges

29 / 30

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

Reducing the braking effort to the front wheels

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

30 / 30

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

That the push rod travel is within limitations on all chambers

That the glad hands and the lines are secure

All of these

That the trailer supply valve is operating properly

Your score is

In Newfoundland, air brake tests are mandatory for anyone who wishes to operate any of these vehicles on the road. The test ensures that the air brake system is working correctly and that drivers understand how to operate it. Additionally, the Newfoundland government enforces strict regulations regarding air brake systems’ maintenance and inspection to ensure optimal safety on the road. These regulations aim to prevent accidents, injuries, and fatalities caused by poorly maintained or faulty air brakes. With these measures in place, Newfoundland’s air brake system standards are vital in promoting transportation safety in the region.

There are two types of Air Brake Endorsement:
Type 9 – Air brake endorsement without brake adjustment certification.
Type 9a – Air brake endorsement with brake adjustment certification.

Drivingtest.ca has prepared this Air Brake practice test to assist drivers in understanding an air brake system’s basic operation and function. Requirements for Air Brake Endorsement are:

1) Must complete an Air Brake Written Test

2) Must complete an Air Brake Practical Test.

This endorsement permits the holder to drive vehicles equipped with air brakes in the class of vehicle for which the driver is licensed.

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