MANITOBA AIR BRAKE PRACTICE TEST 03

Air brakes are a critical component in the safe operation of commercial vehicles in Manitoba, Canada.

Air Brake Test 03

1 / 30

Can the trailer brake hand valve be used for parking?

Never

Only to hold a parked vehicle

Always

None of the above

2 / 30

What is the upward motion of the piston that compresses the air in the cylinder known as?

Compression stoke

Loading stoke

Intake stoke

Cylinder stoke

3 / 30

In a dual air brake system, if one circuit develops a leak, the other circuit would be protected from air pressure loss by the __________________.

Foot valve

Front brake chamber

Primary reservoir

Two-way check valve

4 / 30

In an air-boost hydraulic brake system what is used to intensify the hydraulic pressure generated by the master cylinder?

Air pressure

Vacuum

Wedge

Power screw

5 / 30

When checking for reservoir air leakage for a single unit, after making a full brake application with the foot valve and holding it the air pressure gauge reading should not drop more than __ psi per minute.

6 / 30

What should be done to parked trailers without spring parking brakes to prevent a possible runaway?

Apply emergency break

Park on a decline

Block wheels

Exhaust the supply line

7 / 30

One gram is equal to how many ounces?

0.035

0.5

2.2

8 / 30

Choose the correct order of steps for the compressor and warning devices check as part of a single unit pre-trip air brake inspection.

Check that warning device(s) must operate to 55 psi or higher; ensure reservoir air pressure builds from 50 to 90 psi within three minutes; release the spring parking brake at 90 psi or above to prevent compounding the brake pressure; start the engine and run at fast idle to build air pressure

Release the spring parking brake at 90 psi or above to prevent compounding the brake pressure; start the engine and run at fast idle to build air pressure; check that warning device(s) must operate to 55 psi or higher; ensure reservoir air pressure builds from 50 to 90 psi within three minutes

Ensure reservoir air pressure builds from 50 to 90 psi within three minutes; release the spring parking brake at 90 psi or above to prevent compounding the brake pressure; start the engine and run at fast idle to build air pressure; check that warning device(s) must operate to 55 psi or higher

Start the engine and run at fast idle to build air pressure; check that warning device(s) must operate to 55 psi or higher; ensure reservoir air pressure builds from 50 to 90 psi within three minutes; release the spring parking brake at 90 psi or above to prevent compounding the brake pressure

9 / 30

What does the acronym psi stand for?

Pressure per square inch

Pressure per stopping inch

Pounds per square inch

Pounds per stopping inch

10 / 30

At the first stop after adjusting the wedge type brakes, check each brake drum or rotor for temperature. An extra _______ brake drum indicates that you have _____ adjusted it.

Cold, under

Hot, over

Cold over

Hot, under

11 / 30

What is used to mark where the push rod enters the brake chamber when determining whether an S-cam brake with manual slack adjusters requires adjustment?

Marker

Crayon

Chalk

Grease

12 / 30

Discounting self-lubricated compressors, how are compressors usually lubricated?

From grease application

Does not need lubrication

From the brake fluid

From the engine lubrication system

13 / 30

During the '_______' stage, the compressor is able to cool.

Compression stoke

Unloading

Intake stoke

14 / 30

One metre is equal to how many yards?

5.5

2.09

0.5

1.09

15 / 30

How often do automatic slack adjusters need to?

Every other day

Weekly

Daily

Monthly

16 / 30

What would be the psi if 50 pounds were being forced onto 2 square inches?

100

17 / 30

When conducting a compressor and warning device check for a single unit, warning device(s) must operate to __ psi or higher.

100

18 / 30

One kilogram is equal to how many pounds?

1.5

2.2

19 / 30

If a brake is out of adjustment and there is not enough reserve stroke of the push rod travel to compensate for drum expansion, this will cause ________.

Seized brake camshafts

Excessive moisture in reservoirs

Brake fade

Complete brake loss

20 / 30

An air dryer may be installed between the ________ and the ________ to help remove moisture from the compressed air.

Control port, wet reservoir

Wet reservoir, governor

Compressor, wet reservoir

Governor, compressor

21 / 30

What protects the wet reservoir from becoming over pressurized?

Foot valve

Treadle

Governor

Safety valve

22 / 30

After a long mountain drive, what is the best way to park if your vehicle has spring parking brakes?

Leave the transmission in the lowest gear and block the wheels

Make a service brake application

Apply spring breaks like usual

Make sure wheels are turned toward the curb

23 / 30

For a combination unit, during what part of the pre-trip check do you ensure that the air brake glad hands and trailer electrical cord is connected properly?

Brake test

Vehicle securement

Tractor and trailer emergency system check

Compressor and warning devices check

24 / 30

For a combination unit, during what part of the pre-trip check do you ensure that the reservoir air pressure builds from 50 to 90 psi within three minutes?

Compressor and warning devices check

Vehicle securement

Brake adjustment

Tractor and trailer emergency system check

25 / 30

If an air-actuated hydraulic brake system was to lose its air supply, the vehicle would have no service brakes. Only the __________ would be operating.

Air lines

Parking brake

Compressor

Reservoir

26 / 30

Choose the correct order of steps to secure a vehicle as part of a single unit pre-trip air brake inspection.

Check the drive belt and pulleys for wear, cracking, slippage and tension; set the spring parking brake on the vehicle; block the wheels; check that the compressor is secure

Set the spring parking brake on the vehicle; block the wheels; check that the compressor is secure; check the drive belt and pulleys for wear, cracking, slippage and tension

Block the wheels; check that the compressor is secure; check the drive belt and pulleys for wear, cracking, slippage and tension; set the spring parking brake on the vehicle

Check that the compressor is secure; check the drive belt and pulleys for wear, cracking, slippage and tension; set the spring parking brake on the vehicle; block the wheels

27 / 30

Which of the following does not usually have a pressure gauge?

Secondary reservoir

Wet reservoir

Primary reservoir

Dry reservoir

28 / 30

On a combination unit, the governor should place the compressor in the unloading stage between ___ psi minimum and ___ psi maximum.

115, 135

100, 115

125, 145

150, 175

29 / 30

Which of the following vehicles would require checking the hydraulic fluid level in the reservoir as part of the pre-trip check?

Single with dual brake system

Combination with air actuated brake system

Single with a basic air brake system

Combination with a dual brake system

30 / 30

When inspecting brake adjustment on a single unit, the slack (push rod travel) should be within how many inches within manufacturer's specifications?

1 - 2½

½ - 1¾

¾ - 1½

1½ - 2

Your score is

Since the introduction of the mandatory air brake endorsement in 1996, all drivers of commercial vehicles with air brakes must pass a practical and written test to receive this endorsement. The practical test evaluates the driver’s ability to conduct a pre-trip inspection of the air brake system, perform a brake check, and complete a controlled stop. The written test covers the theory and operation of air brakes, including the various components involved in the system and how they work together to slow and stop a vehicle safely. Furthermore, Manitoba government officials recognize the importance of keeping air brake training and endorsement requirements up to date with current industry standards. As such, Manitoba is one of the few jurisdictions in North America that has implemented mandatory air brake endorsement renewals for commercial drivers. By ensuring that drivers are knowledgeable and trained on air brake systems, Manitoba is proactively promoting road safety for all Manitobans.

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.