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

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

2 / 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

Air from the trailer reservoir released to the brake chambers.

Brakes applied and released up to five times a second

3 / 30

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

Clevis and pin

Slack adjuster

S-cam

Push rod

4 / 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

Increase stopping distance

Gain a mechanical advantage

5 / 30

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

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

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

6 / 30

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

Cleaner, less

Warmer, less

Colder, less

More compressed, less

7 / 30

Friction produces what?

Lubrication

Convection

Heat

Air pressure

8 / 30

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

Release the spring parking brake

Disconnect control (service) line glad hand

Disconnect supply (emergency) line glad hand

Make full brake application

9 / 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

Spring brakes, service brakes

Service brakes, mounting bolts

10 / 30

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

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

Discharging the application air near the brake chambers

11 / 30

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

Cages

Decompresses

Coils

Applies

12 / 30

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

Width, friction

Diameter, friction

Strength, force

Thickness, heat

13 / 30

What absorbs the heat produced by friction?

Diaphragm

Metal brake drums

Brake lining

Treadle

14 / 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

That the trailer supply valve is operating properly

All of these

15 / 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

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

16 / 30

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

Two

Three

Four

One

17 / 30

What does a kPa stand for?

Kilometre

Pressure per square inch

Kilopascal

Kilogram

18 / 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

Two

Four

Ten

19 / 30

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

ABS valves

Wheel sensor

Electronic control unit

Tooth wheel

20 / 30

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

The brake drum to crack or warp.

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

Brake fade

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

21 / 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

22 / 30

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

Mechanic's

Technician's

Owner's

Driver's

23 / 30

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

Compressed

Contained

Canned

Caged

24 / 30

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

Listening for warning signals

Watching the gauges

All of these

Feeling the brake response of the vehicle

25 / 30

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

Automatically exhausts moisture from the reservoir when required

Transmits force in an air brake system

Allows the air to flow in one direction only

Holds a supply of compressed air

26 / 30

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

Push rod

Diaphragm

Mounting bolt

Slack adjuster

27 / 30

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

A compressor

A governor

A foot valve

Spring parking brake chambers

28 / 30

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

Friction, Heat

Mechanical, heat

Motion, mechanical

Heat, mechanical

29 / 30

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

Relay valve

Trailer spring parking brake valve

Front and rear service reservoirs

Compressor

30 / 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

Three to five, 40-70

One, 100-120

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.