NOVA SCOTIA AIR BRAKE KNOWLEDGE TEST 03

Air brake systems are an essential safety feature on large vehicles in Nova Scotia, Canada. The province’s air brake regulations require all drivers of commercial vehicles equipped with air brakes to pass a written knowledge test and a practical air brake test.

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

150, 175

115, 135

2 / 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.

3 / 30

Can the trailer brake hand valve be used for parking?

Never

Only to hold a parked vehicle

Always

None of the above

4 / 30

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

Loading stoke

Compression stoke

Cylinder stoke

Intake stoke

5 / 30

One metre is equal to how many yards?

2.09

0.5

1.09

5.5

6 / 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

7 / 30

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

Compression stoke

Intake stoke

Unloading

8 / 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

9 / 30

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

100

10 / 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

11 / 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

12 / 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

Cold over

Hot, under

Hot, over

13 / 30

What protects the wet reservoir from becoming over pressurized?

Governor

Treadle

Foot valve

Safety valve

14 / 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

Compressor

Air lines

Reservoir

15 / 30

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

Apply emergency break

Exhaust the supply line

Park on a decline

Block wheels

16 / 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

17 / 30

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

Governor, compressor

Compressor, wet reservoir

Control port, wet reservoir

Wet reservoir, governor

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 ________.

Complete brake loss

Excessive moisture in reservoirs

Brake fade

Seized brake camshafts

19 / 30

What does the acronym psi stand for?

Pounds per stopping inch

Pounds per square inch

Pressure per stopping inch

Pressure per square inch

20 / 30

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

Air pressure

Vacuum

Power screw

Wedge

21 / 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

Chalk

Crayon

Grease

22 / 30

One gram is equal to how many ounces?

0.035

2.2

0.5

23 / 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

Primary reservoir

Front brake chamber

Foot valve

24 / 30

How often do automatic slack adjusters need to?

Weekly

Every other day

Daily

Monthly

25 / 30

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

½ - 1¾

¾ - 1½

1 - 2½

1½ - 2

26 / 30

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

Secondary reservoir

Wet reservoir

Dry reservoir

Primary reservoir

27 / 30

One kilogram is equal to how many pounds?

2.2

1.5

28 / 30

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

From the brake fluid

Does not need lubrication

From the engine lubrication system

From grease application

29 / 30

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

100

30 / 30

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

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

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

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

Your score is

The practical test measures the driver’s ability to perform pre-trip inspections, proper pressure tests, and operate the air brake system on the road. Additionally, drivers with air brake endorsements must take refresher courses and retest every five years to ensure their safety and that of other road users. Nova Scotia’s air brake system regulations help to ensure that vehicles on the road are correctly maintained and that drivers are adequately trained to operate these critical safety features.

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 Nova Scotia 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.