Class F -3- Braking Systems - Level 2 | Führerschein Österreich

Class F -3- Braking Systems - Level 2

2 of 4 Levels

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Category: Class F -3- Braking Systems - Level 2

You have coupled a trailer with a two-line compressed air brake system to your tractor. What consequences can it have if the brake force regulator is set incorrectly?

With an empty trailer, the braking effect is too strong. The wheels of the trailer can lock

With a fully loaded trailer, the braking effect is too low. The trailer can start pushing

If the trailer brake remains released, the trailer does not brake

If the trailer brake remains released, the wheels of the trailer lock

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Category: Class F -3- Braking Systems - Level 2

The compressed air brake system of your tractor is equipped with an antifreeze pump. How often should you drain the condensation water from the reservoirs?

Once each in spring and autumn

At outside temperatures above 5°C, weekly

I generally follow the instructions in the operating manual

At outside temperatures of 5°C or below, daily

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Category: Class F -3- Braking Systems - Level 2

How can you tell that the filter cartridge of the air dryer of the compressed air brake system needs to be changed?

By a corresponding display in the on-board computer display

When condensation water escapes when actuating the drain valves on the reservoirs of the brake system

When white smoke comes out of the vehicle exhaust

By a warning light illuminating on the dashboard

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Category: Class F -3- Braking Systems - Level 2

What is the function of the air dryer of a compressed air brake system?

It prevents fogging of the windows in the cab of the tractor

It dries the air compressed by the turbocharger

It dries the air drawn in by the engine for fuel combustion

It removes moisture from the air delivered by the compressor

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Category: Class F -3- Braking Systems - Level 2

Which components serve frost protection of a compressed air brake system?

The air dryer

The antifreeze pump

The heating flange

The condensation valve

6 / 15

Category: Class F -3- Braking Systems - Level 2

The pressure regulator of the compressed air brake system of your tractor is defective. Therefore, the compressor is not switched to idle operation when the cut-out pressure is reached in the reservoirs. What happens then?

At about 8 bar, the tractor brakes automatically

When the pressure reaches a value of about 4 bar above the cut-out pressure, a safety valve opens and releases the excess pressure

When the burst pressure is reached, the system bursts

At about 20 bar, the compressor locks up

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Category: Class F -3- Braking Systems - Level 2

Your compressed air braked trailer has a brake system with ABS. What advantages does this brake system have for traffic safety?

The trailer can never skid

During emergency braking, the wheels do not lock. Therefore the trailer only pushes slightly onto the towing vehicle

The trailer cannot tip over

If the wheels on one side of the vehicle encounter a slippery road surface during emergency braking, the trailer is more likely to stay in the lane

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Category: Class F -3- Braking Systems - Level 2

How can the compressor of a compressed air brake system be driven?

Directly by gears from the engine

By timing belt from the engine

By an auxiliary drive from the transmission

By V-belt from the engine

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Category: Class F -3- Braking Systems - Level 2

What is the function of the compressor of a compressed air brake system?

It regulates the brake pressure in the wheel brake cylinders depending on load

It prevents the condensation water from freezing

It regulates the pressure in the tires depending on load

It compresses the air necessary for the function of the brake system

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Category: Class F -3- Braking Systems - Level 2

What is the function of the pressure regulator of a compressed air brake system?

It ensures that when the cut-in pressure is reached in the reservoirs of the system, the compressor switches to idle operation

It ensures that when the cut-out pressure is reached in the reservoirs of the system, the compressor switches to load operation

It ensures that when the cut-in pressure is reached in the reservoirs of the system, the compressor switches to load operation

It ensures that when the cut-out pressure is reached in the reservoirs of the system, the compressor switches to idle operation

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Category: Class F -3- Braking Systems - Level 2

The compressed air brake system of your tractor is equipped with an antifreeze pump. What maintenance work must you then perform on the reservoirs of the compressed air system?

Degrease the reservoirs

Paint the reservoirs

Drain the condensation water

Clean the drain valves by hand

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Category: Class F -3- Braking Systems - Level 2

What advantages does the air dryer of a compressed air brake system have over an antifreeze device?

The dry air reduces compressed air consumption during braking

The valves of the compressed air brake system are not contaminated by antifreeze

No condensation water reaches the valves of the compressed air brake system

The dry air increases the braking effect

13 / 15

Category: Class F -3- Braking Systems - Level 2

You want to tow a compressed air braked trailer with a tractor that has a brake system with ABS. How must the tractor be equipped for the ABS on the trailer to be regulated?

The tractor must definitely be equipped with a second compressed air reservoir

The tractor must have an electrical connection for the ABS

The tractor must definitely be braked with compressed air

The tractor must definitely be equipped with a second battery

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Category: Class F -3- Braking Systems - Level 2

What is the cut-in pressure of a compressed air brake system?

This is the pressure at which the pressure regulator allows the air delivered by the compressor to flow back into the air reservoirs

This is the pressure at which the pressure regulator switches the compressor to idle operation

This is the pressure at which the pressure regulator switches the compressor back to load operation

This is the pressure at which the pressure regulator releases the air delivered by the compressor into the open

15 / 15

Category: Class F -3- Braking Systems - Level 2

What is the cut-out pressure of a compressed air brake system?

This is the pressure at which the pressure regulator switches the compressor to idle operation

This is the pressure from which the compressor delivers no more air into the reservoirs

This is the pressure at which the pressure regulator switches the compressor to load operation

This is the pressure at which the multi-circuit protection valve shuts off a defective supply circuit

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Class F -3- Braking Systems – Level 2