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

Class D -3- Braking Systems - Level 3

3 of 4 Levels

1 / 15

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

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

If the wheels on one side of the vehicle encounter a slippery road surface during an emergency stop, I can keep the bus in its lane

During an emergency stop, the wheels do not lock. Therefore, the bus remains steerable

The bus cannot tip over

The bus can never skid

2 / 15

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

You are driving your bus. This warning light comes on. How should you behave?

I expect that wheels could lock when braking

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

I notify the registration holder of the bus

I stop as soon as possible at a suitable location. I expect reduced braking performance

3 / 15

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

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

I pump up the reservoirs to cut-off pressure, turn off the engine and release the parking brake. Then I apply the brake pedal with partial braking for about 3 minutes. I observe the pressure drop and listen for hissing sounds

I pump up the reservoirs to safety pressure and turn off the engine. Then I observe the pressure drop for about 7 minutes and listen for hissing sounds

I apply the parking brake for about 3 minutes. I observe the pressure drop and listen for hissing sounds

I pump up the reservoirs to cut-off pressure, turn off the engine and release the parking brake. Then I observe the pressure drop for about 10 minutes and listen for hissing sounds

4 / 15

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

You are checking the tightness of the reservoir circuits of your bus's compressed air brake system. When is the system no longer roadworthy?

If intake noises are audible from the air filter

If intake noises are audible from the compressor

If a pressure drop is noticeable

If compressed air is audibly escaping

5 / 15

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

You are driving your bus. This warning light comes on. What does this mean?

The ABS is malfunctioning or has failed

The load-sensing brake valve regulation has failed

The brake linings are worn

The compressed air brake system has failed

6 / 15

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

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

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

A control unit electronically opens a solenoid valve at each wheel during braking that meters in the optimal brake pressure to the wheel brake cylinder

Sensors on the doors supply values about deceleration to a control unit during braking

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

7 / 15

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

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

A brake system that still brakes electronically after failure of compressed air

A brake system that operates the wheel brakes electromechanically

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

A purely electronic braking system

8 / 15

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

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

Diaphragm brake cylinders

Electric brake cylinders

Tristop cylinders

Conversion cylinders

9 / 15

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

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

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

I press the brake pedal to the floor of the vehicle

I hold the steering wheel firmly

I expect the driver's seat to start pulsating when the ABS starts regulating

10 / 15

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

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

Tristop cylinders have two connections for compressed air

Diaphragm brake cylinders have two connections for compressed air

Tristop cylinders have only one connection for compressed air

Diaphragm brake cylinders have only one connection for compressed air

11 / 15

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

You are driving your bus. This warning light comes on. How should you behave?

I expect that wheels could lock when braking

I stop at a suitable location

I continue until the end of the workday

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

12 / 15

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

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

I apply the parking brake for about 3 minutes. I observe the pressure drop and listen for hissing sounds

I fully press the brake pedal for about 3 minutes. I observe the pressure drop for about 10 minutes and listen for hissing sounds

I pump up the reservoirs to safety pressure, turn off the engine and secure the bus against rolling away. Then I release the parking brake and observe the pressure drop for about 7 minutes and listen for hissing sounds

I pump up the reservoirs to cut-off pressure, turn off the engine and secure the bus against rolling away. Then I release the parking brake and observe the pressure drop for about 10 minutes and listen for hissing sounds

13 / 15

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

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

A pressure regulator for the reservoir pressure is not required

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

The stopping distance is shortened

The wear of the brake linings occurs more evenly

14 / 15

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

Which systems are integrated into the EBS of a bus?

The traction control system ASR

The electronic wear prevention EAV

The electronic stability program ESP or ESC

The anti-lock braking system ABS

15 / 15

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

You are driving your bus. This warning light comes on. What does this mean?

The braking performance of the bus is impaired

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

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

The bus can only be braked with the parking brake system

Your score is

The average score is 0%

Class D -3- Braking Systems – Level 3