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

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?

Chalk

Marker

Grease

Crayon

2 / 30

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

Apply spring breaks like usual

Make a service brake application

Leave the transmission in the lowest gear and block the wheels

Make sure wheels are turned toward the curb

3 / 30

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

Combination with air actuated brake system

Combination with a dual brake system

Single with a basic air brake system

Single with dual brake system

4 / 30

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

150, 175

125, 145

100, 115

115, 135

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

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.

Hot, under

Hot, over

Cold, under

Cold over

7 / 30

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

100

8 / 30

Can the trailer brake hand valve be used for parking?

Only to hold a parked vehicle

Never

None of the above

Always

9 / 30

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

Primary reservoir

Secondary reservoir

Wet reservoir

Dry reservoir

10 / 30

What protects the wet reservoir from becoming over pressurized?

Foot valve

Safety valve

Governor

Treadle

11 / 30

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

100

12 / 30

One gram is equal to how many ounces?

0.5

2.2

0.035

13 / 30

One metre is equal to how many yards?

1.09

0.5

2.09

5.5

14 / 30

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

Cylinder stoke

Intake stoke

Loading stoke

Compression stoke

15 / 30

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

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

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

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

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

16 / 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.

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

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

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

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

17 / 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

Two-way check valve

Front brake chamber

Primary reservoir

18 / 30

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

Park on a decline

Exhaust the supply line

Apply emergency break

Block wheels

19 / 30

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

From the engine lubrication system

From grease application

From the brake fluid

Does not need lubrication

20 / 30

One kilogram is equal to how many pounds?

1.5

2.2

21 / 30

How often do automatic slack adjusters need to?

Weekly

Daily

Every other day

Monthly

22 / 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.

Compressor

Air lines

Parking brake

Reservoir

23 / 30

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

Intake stoke

Unloading

Compression stoke

24 / 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?

Vehicle securement

Tractor and trailer emergency system check

Compressor and warning devices check

Brake test

25 / 30

What does the acronym psi stand for?

Pressure per square inch

Pounds per square inch

Pressure per stopping inch

Pounds per stopping inch

26 / 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 ________.

Complete brake loss

Seized brake camshafts

Excessive moisture in reservoirs

Brake fade

27 / 30

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

Power screw

Vacuum

Air pressure

Wedge

28 / 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?

Brake adjustment

Vehicle securement

Compressor and warning devices check

Tractor and trailer emergency system check

29 / 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

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?

¾ - 1½

1 - 2½

1½ - 2

½ - 1¾

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.