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

Class C -3- Braking Systems - Level 3

3 of 4 Levels

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

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

A pressure regulator for the supply pressure is not required

After failure of one compressed air brake circuit, all wheels still brake fully

The stopping distance is shortened

2 / 15

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

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

The EBS has a serious malfunction and is therefore partially or completely deactivated

The truck can only be braked with the parking brake system

The braking performance of the truck is impaired

The truck can no longer be braked with the compressed air brake system

3 / 15

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

You want to check the tightness of the supply circuits of the compressed air brake system of your truck. How do you perform this check?

I pump up the supply reservoirs to the cut-out pressure, switch off the engine and secure the truck against rolling away. Then I open the parking brake and observe the pressure drop for about 10 minutes and listen for hissing noises

I fully press the brake pedal for about 3 minutes. While doing so, I observe the pressure drop for about 10 minutes and listen for hissing noises

I pump up the supply reservoirs to the protection pressure, switch off the engine and secure the truck against rolling away. Then I open the parking brake and observe the pressure drop for about 7 minutes and listen for hissing noises

I apply the handbrake for about 3 minutes. While doing so, I observe the pressure drop and listen for hissing noises

4 / 15

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

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

The ALB regulation has failed

The ABS is malfunctioning or has failed

The compressed air brake system has failed

The brake pads are worn

5 / 15

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

You want to check the tightness of the brake circuits of the compressed air brake system of your truck. How do you perform this check?

I pump up the supply reservoirs to the protection pressure and switch off the engine. Then I observe the pressure drop for about 7 minutes and listen for hissing noises

I apply the parking brake for about 3 minutes. While doing so, I observe the pressure drop and listen for hissing noises

I pump up the supply reservoirs to the cut-out pressure, switch off the engine and open the parking brake. Then I press the brake pedal for about 3 minutes with partial braking. While doing so, I observe the pressure drop and listen for hissing noises

I pump up the supply reservoirs to the cut-out pressure, switch off the engine and open the parking brake. Then I observe the pressure drop for about 10 minutes and listen for hissing noises

6 / 15

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

What do you understand by an electronically controlled braking system (EBS)?

A compressed air brake system with electronic brake pressure control for each individual wheel

A brake system that still brakes electronically after compressed air failure

A brake system that operates the wheel brakes electromechanically

A purely electronic braking system

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

Which systems are integrated in the EBS of a truck?

The electronic stability program ESP or ESC

The traction control system ASR

The anti-lock braking system ABS

The electronic wear prevention EAV

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

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

When intake noises are audible at the air filter

When a pressure drop is noticeable

When intake noises are audible at the compressor

When compressed air is audibly escaping

9 / 15

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

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

I continue driving until the end of the working day

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

I expect that wheels could lock during braking

I stop at a suitable location

10 / 15

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

How does an electronically controlled braking system (EBS) in a truck basically work?

A control unit electronically opens a solenoid valve at each wheel during braking, which controls the optimal brake pressure into the wheel brake cylinder

Sensors on the wheels deliver values about the wheel speed and brake pad wear for each individual wheel to a control unit during braking

Sensors on the brake pedal deliver values about the desired braking effect to a control unit during braking

Sensors on the cab deliver values about the deceleration to a control unit during braking

11 / 15

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

What are the differences between diaphragm brake cylinders and spring brake cylinders of a compressed air brake system?

Spring brake cylinders have only one connection for compressed air

Diaphragm brake cylinders have only one connection for compressed air

Spring brake cylinders have two connections for compressed air

Diaphragm brake cylinders have two connections for compressed air

12 / 15

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

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

I expect that the brake pedal will begin to pulsate when the ABS begins to regulate

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

I hold the steering wheel firmly with both hands

I press the brake pedal to the floor of the cab

13 / 15

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

What types of wheel brake cylinders are common in trucks with compressed air brake systems?

Electric brake cylinders

Transfer cylinders

Diaphragm brake cylinders

Spring brake cylinders

14 / 15

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

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

I expect that wheels could lock during braking

I notify the registration owner of the truck

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

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

15 / 15

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

Your truck has a brake system with ABS. What advantages does this brake system have for traffic safety?

The truck can never skid

If the wheels on one side of the vehicle hit a slippery road surface during an emergency braking, I can more easily keep the truck in its lane

The truck cannot tip over

During an emergency braking, the wheels do not lock. Therefore, the truck remains steerable

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Class C -3- Braking Systems – Level 3