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

A brake chamber

Locking collar

Slack adjuster

Push rod

2 / 30

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

5,400 psi

3,600 psi

164 psi

75 psi

3 / 30

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

Oil leaking past the piston rings

Cold weather

Faulty wiring

Condensation from heated air cooling

4 / 30

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

Air pressure gauge

Relay valve

Quick release valve

One-way check valve

5 / 30

Most brake linings work best around:

1100° C

300° C

425° C

250° C

6 / 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

Air-boost hydraulic brake system

Wedge brakes

7 / 30

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

Heavy traffic

Slippery road surface

Narrow roads

Inclines

8 / 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, greater

Expansion, less

Contraction, less

Expansion, greater

9 / 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.

10 / 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?

Relay valve

Manual front brake limiting valve

Quick release valve

One-way check valve

11 / 30

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

150 psi

50 psi

75 psi

100 psi

12 / 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.

Brake chamber

Treadle

Diaphragm

Slack adjuster

13 / 30

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

Supply or wet reservoir

Secondary reservoir

Dry reservoir

Primary reservoir

14 / 30

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

Daily

Biweekly

Weekly

Monthly

15 / 30

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

Air, spring

Spring, air

Disc, spring

Spring, disc

16 / 30

Brake chambers and slack adjusters ______________________.

Transfer the force exerted by the compressed air to mechanical linkages

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

Store the compressed air

Create the friction required to stop the wheels

17 / 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?

Air filter is plugged

Scored cylinder

Bad inlet valve

Motor overload

18 / 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

Foot valve

Governor

Brake rotors

19 / 30

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

Disc brakes

Air-over-hydraulic brake system

Air brake system

Wedge brakes

20 / 30

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

Heat energy

Traction

Mechanical energy

Friction

21 / 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.

Wet reservoir

Governor

Foot valve

Compressor

22 / 30

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

Worn cam bushings

All of the below

Bent push rods

Improper installation

23 / 30

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

24 / 30

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

Driver's reaction time

Brake lag

Braking distance

Stopping distance

25 / 30

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

40 to 100 psi

90 to 20 psi

50 to 90 psi

40 to 100 psi

26 / 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, less

Rear wheels, more

Front wheels, more

Rear wheels, less

27 / 30

Levers and air pressure give brakes:

A mechanical advantage

More compression

Mechanical energy

Grey

28 / 30

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

Weight and energy

Energy and friction

Speed and friction

Weight and speed

29 / 30

A foot valve ______________.

Transfers the force exerted by the compressed air to mechanical linkages

Creates the friction required to stop the wheels

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

Stores the compressed air

30 / 30

A spring parking brake system can also act as ____________.

Brake limiting valve

None of the above

Standard air brakes

Emergency brakes

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.