NEWFOUNDLAND AIR BRAKE PRACTICE TEST 02

Air brake systems are an essential safety feature on commercial vehicles in Newfoundland, Canada. The province of Newfoundland and Labrador requires all commercial drivers to complete an air brake endorsement course and pass a written and practical air brake test before operating these vehicles on public roads.

Air Brake Test 02

1 / 30

Which of the following is a disadvantage of a control (service) line and foot and hand valve system?

If the air pressure in the reservoirs were lost, there would be no way to apply the brakes of the tractor or the trailer.

The application and release of the trailer brakes is slower than those of the tractor.

If the trailer broke away from the tractor, the trailer would not have brakes.

All of these

2 / 30

What are the two types of trailer supply valves? Choose the best answer.

Push/pull type and automatic

Automatic and manual

Automatic and spring loaded

Toggle-type switch and manual

3 / 30

Which of the following is responsible for preventing automatic spring brake application if the trailer supply line has a gradual leak?

Rear service reservoir

Spring parking brake chambers

Trailer spring parking brake valve

Relay valve

4 / 30

An ABS system keeps the wheel from skidding and increases vehicle stability and control during what type of conditions?

All of these

Wet roads

Emergency stops

Through curves

5 / 30

$What would happen if a trailer that is not equipped with spring parking brakes were to separate from the tractor?

The trailer brakes will automatically be placed into emergency application

Pressure will build up in the trailer reservoir to the same pressure as the reservoirs on the tractor.

No action will take place until the trailer supply valve is shifted to the emergency position manually to seal off the tractor

No action will take place until a brake application is made

6 / 30

The effectiveness of diaphragm brake chambers drops off significantly if the stroke exceeds __% of its designed travel.

7 / 30

Tractors and trailers _______ ABS can be connected to one another without affecting the operation of the ABS.

Only with the same type of

With or without

Without

With

8 / 30

If the foot valve is supplying a higher application pressure than the hand valve, a two-way check valve will allow air flow from which source?

Foot valve

Both equally

Hand valve

Neither

9 / 30

Which of the following is a term that refers to the coupling device used to connect the control (service) and supply (emergency) lines of the trailer to the tractor?

Glad hands

Application line

Two-way check valve

Tractor protection valve

10 / 30

Which of the following is true of a basic dual air brake system?

Two brake systems in one

More reservoir capacity

Safer than a basic air brake system

All of these

11 / 30

On vehicles equipped with ______ brakes it is possible to pump the brake pedal to compensate for brakes that are out of adjustment. This is not possible with a vehicle equipped with ___________ brakes.

Disc, hydraulic

Air, hydraulic

Hydraulic, air

Air, disc

12 / 30

A/n _______ is an electronic system that monitors wheel speed at all times and controls wheel speed while braking.

An anti-lock brake system

Automatic traction control

Electronic engine control

Modulator valve

13 / 30

On the pre-trip air brake inspection, you must ensure that the parking brake spring is not _______ or it will not expand and apply the brake.

Released

Exhausted

Manually caged

Overheated

14 / 30

If the air pressure drops to a range between ______ psi, the trailer supply valve will close automatically by spring pressure, opening the exhaust port.

60 and 40

50 and 30

45 and 20

70 and 50

15 / 30

Which of the following is capable of directing air flow into a common line from either of the foot valve or the hand valve?

One-way check valve

Tractor protection valve

Reservoir safety valve

Two-way check valve

16 / 30

What system reduces the potential of powering into a jackknife caused by wheel overspin during acceleration?

An anti-lock brake system

Dual air brake system

Automatic traction control

Electronic engine control

17 / 30

___________ prevents total loss of air from the tractor if the trailer breaks away, or if the connecting air lines between tractor and trailer become separated or ruptured.

A reservoir safety valve

A two-way check valve

A tractor protection system

Emergency brakes

18 / 30

If a relay emergency valve is mounted on the trailer reservoir and a loss of air pressure from the power unit service system occurs, what will automatically happen?

Stops air pressure in the reservoir from going back to the source of the supply

A quick release of the trailer brakes

Emergency application of the brakes

It has no automatic function

19 / 30

When connecting the glad hands, start with the two gaskets together and the couplers at a ___ angle to each other.

180°

90°

45°

120°

20 / 30

In regards to a dual air brake system, air taken from primary and secondary circuits through a two-way check valve is known as _________.

Dual air

Coalesced air

Blended air

Tertiary air

21 / 30

Caging a spring parking brake is the same as...

Servicing them

Placing them inside metal bars

Mechanically releasing them

Applying them

22 / 30

Which of the following negatively affects braking ability?

All of these

Contaminated brake linings

Oversized drums

Malfunctioning valves

23 / 30

Which of the following can a tractor with a dual air brake and spring parking brakes system tow?

A tractor with a dual air brake system and without spring parking brakes

Tractors and trailers are interchangeable regardless of air brake system or spring parking brake installation

A tractor with a basic air brake system and without spring parking brakes

A tractor with a basic air brake system and spring parking brakes

24 / 30

When a brake diaphragm chamber bottoms out, the force reduces to ____.

25 / 30

Which of the following is true in the case that there is air loss in one of the dual air brake system's circuits?

Trailer will lose all braking ability

Spring breaks will be applied automatically

The pressure in the trailer reservoirs and lines will drain off

Trailer will continue having braking ability

26 / 30

Which of the following negatively affect braking ability?

Brand new linings

If the angle between the slack adjuster arm and the push rod are at 90°

Excessive moisture in reservoirs

If the diaphragm brake chambers drops off significantly if the stroke is just below 75% of its designed travel.

27 / 30

___________ must not be used to hold a parked vehicle that is left unattended. Loss of pressure will result in loss of brakes. Always set the __________.

Parking breaks, trailer breaks

Trailer brakes, parking brakes

Emergency brakes, trailer breaks

Trailer brakes, emergency brakes

28 / 30

Which of the following is another term for a control (service) line?

Application line

Glad hands

Supply line

Tractor protection valve

29 / 30

A tractor protection valve is normally located near the _________.

Tractor protection valve

Control (service line)

Rear of the tractor cab

Front of the tractor cab

30 / 30

With automatic traction control, __________ is activated when the system detects a wheel slipping because the wheels operating on different surfaces such as one wheel on dry pavement and the other on ice.

Dual air brake system

Anti-lock brake systsem

Differential braking

Electronic engine control

Your score is

The province’s Highway Traffic Act mandates this Air Brake System endorsement. It ensures that only qualified drivers are responsible for safely operating transport trucks, buses, and other large commercial vehicles. With these rigid safety standards, Newfoundland is a leader in promoting safe driving practices and reducing the risk of accidents on its roads. The air brake system in Newfoundland is treated with the utmost importance to ensure the safety of all road users, emphasizing the importance of well-trained and certified drivers.

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.