NEW BRUNSWICK AIR BRAKE TEST 03

Air brake systems are critical components of commercial vehicles in New Brunswick, Canada. In this region, all commercial vehicles with a gross vehicle weight rating above 4,500 kg must have functional air brakes.

Air Brake Test 03

1 / 30

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

100

2 / 30

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

Unloading

Compression stoke

Intake stoke

3 / 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 ________.

Excessive moisture in reservoirs

Complete brake loss

Brake fade

Seized brake camshafts

4 / 30

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

Intake stoke

Cylinder stoke

Loading stoke

Compression stoke

5 / 30

One gram is equal to how many ounces?

0.035

0.5

2.2

6 / 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.

7 / 30

How often do automatic slack adjusters need to?

Monthly

Daily

Every other day

Weekly

8 / 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.

Parking brake

Reservoir

Compressor

Air lines

9 / 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 a dual brake system

Single with dual brake system

Single with a basic air brake system

Combination with air actuated brake system

10 / 30

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

Block wheels

Park on a decline

Apply emergency break

Exhaust the supply line

11 / 30

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

Governor, compressor

Wet reservoir, governor

Compressor, wet reservoir

Control port, wet reservoir

12 / 30

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

115, 135

150, 175

125, 145

100, 115

13 / 30

One metre is equal to how many yards?

0.5

1.09

2.09

5.5

14 / 30

Can the trailer brake hand valve be used for parking?

Only to hold a parked vehicle

Always

None of the above

Never

15 / 30

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

Wedge

Power screw

Air pressure

Vacuum

16 / 30

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

Secondary reservoir

Dry reservoir

Primary reservoir

Wet reservoir

17 / 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

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

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

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

18 / 30

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

From the engine lubrication system

From the brake fluid

From grease application

Does not need lubrication

19 / 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

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

20 / 30

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

Make sure wheels are turned toward the curb

Leave the transmission in the lowest gear and block the wheels

Make a service brake application

Apply spring breaks like usual

21 / 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 __________________.

Two-way check valve

Front brake chamber

Primary reservoir

Foot valve

22 / 30

What protects the wet reservoir from becoming over pressurized?

Treadle

Governor

Safety valve

Foot valve

23 / 30

One kilogram is equal to how many pounds?

1.5

2.2

24 / 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?

Crayon

Marker

Grease

Chalk

25 / 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?

Compressor and warning devices check

Brake test

Tractor and trailer emergency system check

Vehicle securement

26 / 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, over

Hot, under

Cold over

Cold, under

27 / 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

¾ - 1½

½ - 1¾

1½ - 2

28 / 30

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

100

29 / 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?

Tractor and trailer emergency system check

Brake adjustment

Compressor and warning devices check

Vehicle securement

30 / 30

What does the acronym psi stand for?

Pressure per square inch

Pounds per square inch

Pounds per stopping inch

Pressure per stopping inch

Your score is

The New Brunswick Air Brake Test is mandatory for all drivers of commercial vehicles with air brakes, regardless of prior experience. This test ensures that drivers have the knowledge and skills to perform daily air brake inspections, identify system problems, and perform emergency braking maneuvers safely. The importance of air brake safety in New Brunswick is further emphasized by legislation that enforces strict regulations regarding the maintenance of air brake systems. Commercial vehicle operators must perform regular inspections and maintenance on their air brake systems, including an annual in-depth inspection by a certified mechanic. Failure to comply with these regulations can result in hefty fines and even loss of operating privileges. With such strict measures in place, New Brunswick maintains a meager rate of accidents related to malfunctioning air brakes, ensuring the safety of all road users.

Before learning to drive a Class 1, Class 2, Class 3, or Class 4 vehicle, you must get authorized instruction in the class of vehicle you want to be licensed in. For each section of these practice tests, we have multiple practice tests. Requirements for Air Brake Endorsement are 1) Must complete an Air Brake Written Test 2) Must complete an Air Brake Practical Test.

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