Class C -3- Braking Systems - Level 4 | Führerschein Österreich

Class C -3- Braking Systems - Level 4

4 of 4 Levels

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Category: Class C -3- Braking Systems - Level 4

Your truck is equipped with an exhaust brake. How does an exhaust brake basically work?

When activated, the engine is switched off

When activated, the compression pressure in the engine is electromagnetically increased

When activated, the fuel injection is increased

When activated, a flap in the exhaust is closed, at which the exhaust gases of the engine build up

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Category: Class C -3- Braking Systems - Level 4

What are the advantages that the spring brake system of a truck is braked by pressure drop and not by feeding compressed air?

If the supply pressure in the brake system of the truck is too low, the truck remains braked

The compressed air consumption is lower

The wheel brakes remain braked even when the supply pressure in the brake system of the truck drops

Should the compressed air supply of the brake system completely escape during driving, an emergency braking is still possible with the spring brake system

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Category: Class C -3- Braking Systems - Level 4

What possibilities are there to release the spring brake system of a truck if the supply pressure is too low?

By manual release

By external air supply

By electronic activation

By hydraulic activation

4 / 15

Category: Class C -3- Braking Systems - Level 4

You are checking the tightness of the brake circuits of the compressed air brake system of your truck. When is the system no longer roadworthy?

When a pressure drop is noticeable

When the pressure rises by more than 10% of the cut-out pressure

When the pressure rises by more than 10% of the protection pressure

When compressed air is audibly escaping

5 / 15

Category: Class C -3- Braking Systems - Level 4

Which of the listed devices are retarder systems in commercial vehicles?

Spring brake cylinders

Hydraulic retarders (hydrodynamic brakes)

Electromagnetic retarders (eddy current brakes)

Exhaust brakes with exhaust flap

6 / 15

Category: Class C -3- Braking Systems - Level 4

You operate the spring brake system of a truck. What activates the wheel brake?

By pressure drop in the spring brake cylinder, the storage spring operates the wheel brake

By releasing a hydraulic valve, the storage spring operates the wheel brake

By releasing an electromagnet, the storage spring operates the wheel brake

By feeding compressed air into the spring brake cylinder

7 / 15

Category: Class C -3- Braking Systems - Level 4

What advantages do electromagnetic and hydraulic retarders have compared to exhaust brakes during driving?

The components are lighter

They work louder

They work quieter

They are more powerful

8 / 15

Category: Class C -3- Braking Systems - Level 4

Your truck is equipped with spring brake cylinders. According to the specifications in the operating manual of the truck, a tool is required for releasing the spring brake cylinders. What must you pay attention to?

In this case, no wheel chock needs to be carried

A certificate about the last official inspection of the release tool must be carried

The required release tool must be presented on request during traffic checks

The required release tool must be carried

9 / 15

Category: Class C -3- Braking Systems - Level 4

What must you pay attention to when using the exhaust brake of your truck?

With a fully loaded vehicle and a good road surface, the truck can skid

The braking effect of the exhaust brake depends on the gear engaged

The braking effect of the exhaust brake depends on the engine speed

With an empty vehicle and slippery road, the truck can easily skid

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Category: Class C -3- Braking Systems - Level 4

What advantages does an electronically controlled braking system (EBS) have compared to a compressed air brake system without EBS?

The wear of the brake pads occurs more evenly

The stopping distance is lengthened

After failure of the electronic brake control, all wheels still brake fully

The stopping distance is shortened

11 / 15

Category: Class C -3- Braking Systems - Level 4

Your truck has a brake system with EBS. How do you correctly perform an emergency braking?

I immediately put the gear selector to "N" if the truck has an automated transmission

I expect that the driver seat will begin to pulsate when the EBS begins to regulate

I press the brake pedal to the floor of the cab and hold the steering wheel firmly with both hands

I immediately disengage the clutch if the truck has a foot-operated clutch

12 / 15

Category: Class C -3- Braking Systems - Level 4

You are driving your truck. This warning light illuminates. How should you behave?

I expect that wheels could lock during braking

I stop as quickly as possible at a suitable location. In doing so, I must definitely expect reduced braking performance

I stop as quickly as possible at a suitable location. In doing so, I can expect the same braking performance as in normal driving

After stopping, I read in the operating manual of the truck what behavior rules are provided for this case

13 / 15

Category: Class C -3- Braking Systems - Level 4

Your truck is equipped with a compressed air-operated hydraulic brake system. How can you check whether the hydraulic part remains tight under load in this brake system?

I press the brake pedal several times with the engine switched off. If I then start the engine, the brake pedal must give way slightly

I press the brake pedal to the floor of the cab for about 30 seconds. There must be no pressure drop in the supply reservoirs of the compressed air system

I press the brake pedal halfway for about 5 seconds. There must be no illumination of the brake lights

I press the brake pedal to the floor of the cab for about 30 seconds. There must be no leakage of brake fluid

14 / 15

Category: Class C -3- Braking Systems - Level 4

You are driving your truck. This warning light illuminates. What does this mean?

The Electronic Braking System (EBS) has completely failed

The braking performance is definitely impaired

The Electronic Braking System (EBS) is malfunctioning

Control functions of the Electronic Braking System (EBS) - for example ABS - are deactivated

15 / 15

Category: Class C -3- Braking Systems - Level 4

Your truck is equipped with a compressed air-operated hydraulic brake system. How does this brake system basically work?

When I press the brake pedal, I feed compressed air into the booster cylinders

In the booster cylinders, the brake fluid is pressurized by the fed compressed air

The pressure in the brake fluid is transferred from the booster cylinder via the brake lines to the wheel brake cylinders

In the wheel brake cylinders, the wheel brakes are activated by the pressure of the brake fluid

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Class C -3- Braking Systems – Level 4