NEWFOUNDLAND AIR BRAKE PRACTICE TEST 03

Air brake systems are essential safety features on heavy-duty vehicles in Newfoundland, Canada.

Air Brake Test 03

1 / 30

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

100, 115

125, 145

115, 135

150, 175

2 / 30

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

1½ - 2

1 - 2½

½ - 1¾

¾ - 1½

3 / 30

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

100

4 / 30

One gram is equal to how many ounces?

0.5

0.035

2.2

5 / 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?

Tractor and trailer emergency system check

Vehicle securement

Compressor and warning devices check

Brake test

6 / 30

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

Compression stoke

Intake stoke

Unloading

7 / 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.

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

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

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

8 / 30

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

From the brake fluid

From the engine lubrication system

Does not need lubrication

From grease application

9 / 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

Tractor and trailer emergency system check

Vehicle securement

Brake adjustment

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

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

12 / 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

Make a service brake application

Leave the transmission in the lowest gear and block the wheels

Apply spring breaks like usual

13 / 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

14 / 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

Chalk

Grease

15 / 30

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

Block wheels

Apply emergency break

Exhaust the supply line

Park on a decline

16 / 30

One kilogram is equal to how many pounds?

2.2

1.5

17 / 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.

Reservoir

Air lines

Parking brake

Compressor

18 / 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 ________.

Brake fade

Excessive moisture in reservoirs

Complete brake loss

Seized brake camshafts

19 / 30

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

100

20 / 30

What does the acronym psi stand for?

Pressure per square inch

Pressure per stopping inch

Pounds per stopping inch

Pounds per square inch

21 / 30

How often do automatic slack adjusters need to?

Every other day

Daily

Monthly

Weekly

22 / 30

What protects the wet reservoir from becoming over pressurized?

Governor

Foot valve

Treadle

Safety valve

23 / 30

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

Intake stoke

Compression stoke

Cylinder stoke

Loading stoke

24 / 30

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

Secondary reservoir

Wet reservoir

Dry reservoir

Primary reservoir

25 / 30

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

Compressor, wet reservoir

Governor, compressor

Control port, wet reservoir

Wet reservoir, governor

26 / 30

One metre is equal to how many yards?

5.5

1.09

0.5

2.09

27 / 30

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

Power screw

Air pressure

Wedge

Vacuum

28 / 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.

29 / 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

Single with a basic air brake system

Combination with a dual brake system

Single with dual brake system

30 / 30

Can the trailer brake hand valve be used for parking?

None of the above

Only to hold a parked vehicle

Always

Never

Your score is

These systems are designed to provide efficient and reliable braking power to commercial trucks and buses, ensuring that drivers can safely control their vehicles and avoid accidents. In Newfoundland, air brake systems are subject to rigorous testing and regulation by the province’s Ministry of Transportation and Infrastructure. Commercial drivers must pass a comprehensive air brake test before receiving their license to operate a heavy-duty vehicle. This test includes hands-on training and evaluation of the driver’s understanding of air brake principles, maintenance, and operation. The safety of drivers and passengers in Newfoundland is paramount. The rigorous air brake testing and regulation exemplify the province’s commitment to ensuring public road safety.

There are two types of Air Brake Endorsement:
Type 9 – Air brake endorsement without brake adjustment certification.
Type 9a – Air brake endorsement with brake adjustment certification.

Drivingtest.ca has prepared this Air Brake practice test to assist drivers in understanding an air brake system’s basic 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 class of vehicle for which the driver is licensed.

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