Class E (Truck) -2- Braking Systems - Level 4

4 of 4 Levels

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Category: Class E (Truck) -2- Braking Systems - Level 4

Your trailer is equipped with an electronically controlled braking system (EBS). How is the braking force coordinated between trailer and towing vehicle?

It is necessary to release compressed air from the reservoir on the trailer before departure

It is necessary to regularly visit a specialist workshop for this

It is necessary to correctly set a brake force regulator on the trailer according to the loading condition

The electronically controlled braking system (EBS) regulates this automatically

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Category: Class E (Truck) -2- Braking Systems - Level 4

How is the braking effect of a trailer adapted to its loading condition?

Always by a manually adjustable brake force regulator

Automatically by the handbrake valve on the trailer

Automatically by the electronically controlled braking system (EBS)

Automatically by the release valve on the trailer

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Category: Class E (Truck) -2- Braking Systems - Level 4

What advantages does it have that the spring brake system of a trailer is braked by pressure drop and not by feeding compressed air?

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

The compressed air consumption is lower

The brake wear is lower

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

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Category: Class E (Truck) -2- Braking Systems - Level 4

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

A brake system that still brakes electronically after the compressed air fails

A purely electronic braking system

A brake system that actuates the wheel brakes electromechanically

An air brake system with electronic brake pressure control for each individual wheel

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Category: Class E (Truck) -2- Braking Systems - Level 4

What is ABS on a trailer?

An anti-lock braking system for the wheel brakes

A coupling aid

An anti-lock system for the trailer drawbar

An automatic rotation control for the turntable

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Category: Class E (Truck) -2- Braking Systems - Level 4

How does an ABS brake system on a trailer basically work?

When a wheel starts to lock up when braking, the ABS control unit reduces the brake pressure at the affected wheel or axle

When a wheel starts to lock up when braking, the ABS control unit increases the brake pressure at the affected wheel

The ABS control unit measures whether a wheel is starting to lock up when braking

Speed sensors provide the speed value for each individual wheel to a control unit when braking

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Category: Class E (Truck) -2- Braking Systems - Level 4

What types of wheel brake cylinders are common on trailers with air brake systems?

Diaphragm brake cylinders

Transformer cylinders

Electric brake cylinders

Tristop cylinders

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Category: Class E (Truck) -2- Braking Systems - Level 4

Your vehicle combination has an air brake system with spring brake. What can be the cause if the system takes too long to pump up?

The exhaust can be blocked

The reservoirs could be filled with water

The compressor can have compression losses

The system can be leaky

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Category: Class E (Truck) -2- Braking Systems - Level 4

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

Diaphragm brake cylinders have two connections for compressed air

Diaphragm brake cylinders have only one connection for compressed air

Tristop cylinders have only one connection for compressed air

Tristop cylinders have two connections for compressed air

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Category: Class E (Truck) -2- Braking Systems - Level 4

How does an electronically controlled braking system (EBS) on a trailer basically work?

Sensors at the trailer brake valve on the drawbar provide values about the deceleration to a control unit when braking

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

Sensors on the brake pedal provide values about the desired braking effect to a control unit when braking

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

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Category: Class E (Truck) -2- Braking Systems - Level 4

You activate the spring brake system of a trailer. How is the wheel brake activated?

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

By feeding compressed air into the spring brake cylinder

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

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

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Class E (Truck) -2- Braking Systems – Level 4