MANITOBA AIR BRAKE PRACTICE TEST 01

Air brakes are an essential component of any commercial vehicle operating in Manitoba, Canada. The province requires that all drivers of commercial vehicles equipped with air brakes must possess an air brake endorsement on their driver’s license.

Air Brake Test 01

1 / 30

Which of the following uses air pressure to assist brake force but does not require an air brake endorsement on your licence in order to operate?

Air-actuated hydraulic brake system

Disc brakes

Wedge brakes

Air-boost hydraulic brake system

2 / 30

The first reservoir after the compressor is known as the __________.

Dry reservoir

Supply or wet reservoir

Primary reservoir

Secondary reservoir

3 / 30

Which of the following controls the minimum and maximum air pressure in the air brake system by controlling when the compressor pumps air?

Brake chamber

Brake rotors

Foot valve

Governor

4 / 30

All compressor reservoirs must be drained ______, in order to avoid excess water collection.

Daily

Biweekly

Monthly

Weekly

5 / 30

A manual front brake limiting valve is useful in what type of conditions?

Slippery road surface

Narrow roads

Heavy traffic

Inclines

6 / 30

When a manual front brake limiting valve is activated, when applying air pressure to the front brakes it is reduced to __ percent of the application air pressure being delivered to the rear brake chambers.

7 / 30

A spring parking brake system can also act as ____________.

Standard air brakes

Brake limiting valve

Emergency brakes

None of the above

8 / 30

A reservoir's safety valve is normally set at ______.

75 psi

150 psi

50 psi

100 psi

9 / 30

The force that resists movement between two surfaces in contact with each other:

Traction

Friction

Heat energy

Mechanical energy

10 / 30

Brake chambers and slack adjusters ______________________.

Store the compressed air

Create the friction required to stop the wheels

Regulate the flow of compressed air from the reservoir when it is needed for braking

Transfer the force exerted by the compressed air to mechanical linkages

11 / 30

Most brake linings work best around:

300° C

425° C

1100° C

250° C

12 / 30

If compressed air of 120 psi acts on a diaphragm of 45 square inches, how much force is produce?

164 psi

3,600 psi

75 psi

5,400 psi

13 / 30

The time it takes from the moment a hazard is recognized to the time the brake is applied is known as:

Stopping distance

Brake lag

Driver's reaction time

Braking distance

14 / 30

The foot valve is usually located closer to the ________. The longer the distance from the foot valve to the rear chambers, the ______ time it will take before the rear brakes apply.

Front wheels, more

Front wheels, less

Rear wheels, less

Rear wheels, more

15 / 30

What component of an air brake system prevents air from moving backwards in the system toward the compressor?

Relay valve

Air pressure gauge

One-way check valve

Quick release valve

16 / 30

A foot valve ______________.

Creates the friction required to stop the wheels

Stores the compressed air

Transfers the force exerted by the compressed air to mechanical linkages

Regulates the flow of compressed air from the reservoir when it is needed for braking

17 / 30

The braking force required to stop a vehicle varies directly with its _______________.

Weight and energy

Speed and friction

Energy and friction

Weight and speed

18 / 30

When the driver releases the foot valve treadle and the air in the brake chambers is allowed to exhaust through the ______, releasing the brakes.

Governor

Wet reservoir

Compressor

Foot valve

19 / 30

Braking at highway speed causes brake drum _______ due to heat, which in turn requires _____ push rod travel to maintain the same braking force.

Contraction, less

Contraction, greater

Expansion, less

Expansion, greater

20 / 30

Which of the following is a circular container divided in the middle by a flexible diaphragm?

A brake chamber

Locking collar

Push rod

Slack adjuster

21 / 30

What is the cause of accumulated sludge at the bottom of a reservoir?

Condensation from heated air cooling

Cold weather

Faulty wiring

Oil leaking past the piston rings

22 / 30

In a spring parking brake system, the brakes are applied by _____ pressure and retracted by ______ pressure.

Spring, disc

Spring, air

Disc, spring

Air, spring

23 / 30

What part can be installed on long wheel base vehicles to allow the brakes to release quickly and fully by discharging the application air near the brake chambers?

Manual front brake limiting valve

Relay valve

Quick release valve

One-way check valve

24 / 30

If an air brake system's compressor is struggling to build 90 psi of air pressure within 3 minutes, which of the following is most likely the problem?

Motor overload

Bad inlet valve

Air filter is plugged

Scored cylinder

25 / 30

Which of the following can result in a brake system's automatic slack adjuster not maintaining proper slack?

Bent push rods

All of the below

Worn cam bushings

Improper installation

26 / 30

The distance the ______ of the foot valve is depressed by the driver determines the air pressure that will be applied in order to operate the brakes.

Treadle

Brake chamber

Slack adjuster

Diaphragm

27 / 30

Levers and air pressure give brakes:

Grey

Mechanical energy

A mechanical advantage

More compression

28 / 30

What type of brake assembly uses a 'power screw'?

Air-over-hydraulic brake system

Disc brakes

Air brake system

Wedge brakes

29 / 30

To stop a vehicle in 1/10 the time it took to accelerate would require a stopping force of __ times the acceleration force.

30 / 30

The compressor must be able to build reservoir air pressure from _______ within three minutes, otherwise the compressor requires servicing.

90 to 20 psi

50 to 90 psi

40 to 100 psi

Your score is

This endorsement is issued only after the completion of a specialized air brake course accredited by the province. The course covers in detail the mechanics of the braking system, emergency situations, and proper maintenance of the air brake system. Furthermore, Manitoba regulates the frequency of air brake inspections, which must be completed regularly to ensure the system remains in good working order. These regulations help ensure the safety of both the driver and the public while on the road. Manitoba’s strict approach towards air brake regulations has made it a leader in safe commercial driving practices across Canada.

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.