Class D -3- Braking Systems - Level 1 | Führerschein Österreich

Class D -3- Braking Systems - Level 1

1 of 4 Levels

1 / 15

Category: Class D -3- Braking Systems - Level 1

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

The heating flange

The air dryer

The multi-circuit protection valve

The condensate valve

2 / 15

Category: Class D -3- Braking Systems - Level 1

This warning light comes on at the dashboard of your bus during driving. How should you behave?

After stopping, I perform a complete leak test of the brake system

I drive carefully to the nearest workshop and only have the brake system checked there

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

I stop immediately and expect that the braking effect is not as strong as usual

3 / 15

Category: Class D -3- Braking Systems - Level 1

This warning light comes on at the dashboard of your bus during driving. How should you behave?

I switch on the hazard warning lights and secure the bus after stopping

I stop as soon as possible at a suitable location and turn off the engine. Then I have the bus towed

I should visit a workshop as soon as possible

I stop immediately at the right edge of the road. Then I turn off the engine

4 / 15

Category: Class D -3- Braking Systems - Level 1

What is the cut-in 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 at which the pressure regulator lets the air pumped by the compressor flow back into the air tanks

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

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

5 / 15

Category: Class D -3- Braking Systems - Level 1

How can you check the proper function of the air supply section of your bus's compressed air brake system?

If the air reservoirs are empty, the reservoir pressure must rise quickly after starting the vehicle engine

The cut-off noise of the compressor must be clearly audible during driving

The venting of the air reservoirs must be clearly audible at regular intervals during driving

During driving, the reservoir pressure shown by the pressure gauge must move between cut-in and cut-out pressure

6 / 15

Category: Class D -3- Braking Systems - Level 1

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

This is the pressure at which the multi-circuit protection valve disconnects a defective reservoir circuit

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

This is the pressure from which the compressor no longer pumps air into the reservoirs

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

7 / 15

Category: Class D -3- Braking Systems - Level 1

This warning light comes on at the dashboard of your bus. What does this mean?

That the ABS is malfunctioning

That the brake linings have become wet

That the reservoir pressure in the air tanks of the brake system is too low

That the brake linings are worn

8 / 15

Category: Class D -3- Braking Systems - Level 1

Which of the listed parts belong to the air supply section of a compressed air brake system in a bus?

The compressor

The antifreeze device

The wheel brake cylinders

The pressure regulator

9 / 15

Category: Class D -3- Braking Systems - Level 1

This warning light comes on at the dashboard of your bus during driving. What can this mean?

That the brake light has failed

That part of the brake system has failed

That the reservoir pressure in the air tanks of the brake system is too low

That the brake linings have overheated

10 / 15

Category: Class D -3- Braking Systems - Level 1

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

At about 8 bar, the bus automatically brakes

At about 20 bar, the compressor blocks

When the burst pressure is reached, the system bursts

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

11 / 15

Category: Class D -3- Braking Systems - Level 1

Your bus has a compressed air brake system with spring brake. What can be the cause if the system takes too long to pump up?

The reservoirs could be filled with water

The system may be leaking

The compressor may have compression losses

The exhaust may be blocked

12 / 15

Category: Class D -3- Braking Systems - Level 1

Your bus has a compressed air brake system with spring brake. The reservoirs are without pressure. How can you check the function of the compressor after starting the engine?

I follow the instructions in the bus operating manual for this

The reservoir pressure shown on the pressure gauge on the dashboard must rise quickly

The cut-in pressure must be reached in the reservoirs within 45 seconds at the latest

The cut-off pressure must be reached in the reservoirs within 30 seconds at the latest

13 / 15

Category: Class D -3- Braking Systems - Level 1

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

By a power take-off from the transmission

Directly by gears from the engine

By timing belt from the engine

By V-belt from the engine

14 / 15

Category: Class D -3- Braking Systems - Level 1

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

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

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

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

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

15 / 15

Category: Class D -3- Braking Systems - Level 1

What is the task of the compressor in a compressed air brake system?

It regulates the pressure in the tires depending on the load

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

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

It prevents the condensate from freezing

Your score is

The average score is 0%

Class D -3- Braking Systems – Level 1