MANITOBA AIR BRAKE PRACTICE TEST 02

In Manitoba, Canada, air brakes are a crucial safety feature for heavy vehicles such as trucks and buses.

Air Brake Test 02

1 / 30

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

Electronic engine control

Modulator valve

An anti-lock brake system

Automatic traction control

2 / 30

Which of the following negatively affects braking ability?

All of these

Malfunctioning valves

Contaminated brake linings

Oversized drums

3 / 30

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

All of these

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.

4 / 30

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

Through curves

Wet roads

Emergency stops

All of these

5 / 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

6 / 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

7 / 30

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

With or without

With

Only with the same type of

Without

8 / 30

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

Application line

Glad hands

Tractor protection valve

Supply line

9 / 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.

Overheated

Exhausted

Released

Manually caged

10 / 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?

The pressure in the trailer reservoirs and lines will drain off

Spring breaks will be applied automatically

Trailer will lose all braking ability

Trailer will continue having braking ability

11 / 30

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

Two brake systems in one

More reservoir capacity

All of these

Safer than a basic air brake system

12 / 30

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

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

13 / 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

Hydraulic, air

Air, hydraulic

Air, disc

14 / 30

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

No action will take place until a brake application is made

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

15 / 30

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

Dual air brake system

Automatic traction control

An anti-lock brake system

Electronic engine control

16 / 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?

A quick release of the trailer brakes

It has no automatic function

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

Emergency application of the brakes

17 / 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?

Two-way check valve

Glad hands

Application line

Tractor protection valve

18 / 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?

Both equally

Foot valve

Neither

Hand valve

19 / 30

Which of the following negatively affect braking ability?

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

Brand new linings

Excessive moisture in reservoirs

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

20 / 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.

70 and 50

50 and 30

45 and 20

60 and 40

21 / 30

A tractor protection valve is normally located near the _________.

Rear of the tractor cab

Control (service line)

Tractor protection valve

Front of the tractor cab

22 / 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.

Anti-lock brake systsem

Dual air brake system

Differential braking

Electronic engine control

23 / 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 _________.

Coalesced air

Dual air

Tertiary air

Blended air

24 / 30

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

Applying them

Mechanically releasing them

Placing them inside metal bars

Servicing them

25 / 30

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

26 / 30

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

45°

90°

120°

180°

27 / 30

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

28 / 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?

Reservoir safety valve

Two-way check valve

One-way check valve

Tractor protection valve

29 / 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

Trailer spring parking brake valve

Spring parking brake chambers

Relay valve

30 / 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 __________.

Trailer brakes, parking brakes

Trailer brakes, emergency brakes

Parking breaks, trailer breaks

Emergency brakes, trailer breaks

Your score is

To operate these vehicles, drivers must hold a valid air brake endorsement on their driver’s license. This endorsement requires passing a written and practical air brake test to ensure the driver understands how the system works and can properly maintain and operate the vehicle. Regular system inspections are also required to ensure that it is functioning correctly. The air brake system in Manitoba vehicles uses compressed air to activate brakes, providing a more reliable and effective method of stopping the vehicle. Implementing air brakes has significantly improved vehicle safety in Manitoba, reducing the likelihood of accidents caused by brake failure. The provincial government has also recognized the importance of air brakes, which has established strict regulations to ensure that this safety feature is properly maintained and used by drivers.

Drivingtest.ca has prepared this Air Brake practice test to assist drivers in understanding an air brake system’s essential 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 vehicle class for which the driver is licensed.

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