Class E (Truck) -4- Coupling, Uncoupling - Level 2

2 of 3 Levels

1 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

You have coupled a trailer to a truck. You notice that the connection is not securely closed. How should you behave?

I start my journey and trust that the connection will engage while driving

I uncouple the trailer and then couple it again

I press the operating lever of the trailer coupling down until the connection engages

I secure the trailer with the wheel chocks. Then I try to achieve a secure connection by moving the truck forward and backward

2 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

Which parts of the trailer coupling or drawbar must be regularly greased?

The coupling bolt of the trailer coupling of the truck

The height adjustment on the drawbar of the trailer

The operating lever of the trailer coupling of the truck

The tension spring on the drawbar of the trailer

3 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

You have uncoupled a trailer wagon. Why must the towing eye of the drawbar of the trailer remain at least 20 cm above the ground?

Otherwise I can no longer connect the hose lines of the compressed air brake system

Otherwise there is a danger that the tires will be overloaded

The drawbar could hit the ground if the trailer tears off from the towing vehicle during driving. This creates the danger that the trailer tips over

Otherwise I can no longer connect the electrical cables

4 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

The fifth wheel coupling on your tractor unit is not designed for low maintenance. You grease the locking hook and locking bolt of the fifth wheel coupling by hand. What do you pay attention to?

I follow the instructions in the operating manual of the fifth wheel coupling

The fifth wheel coupling must definitely be closed

A semi-trailer must definitely be coupled

The fifth wheel coupling must definitely be open

5 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

You want to adjust the drawbar length on a trailer. What options are there for this?

There are no systems for this

Systems with rubber band fixing of the drawbar or tow bar

Systems with pneumatic fixing of the drawbar or tow bar

Systems with mechanical fixing of the drawbar or tow bar

6 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

You are checking the play in the bearing bushings of the drawbar at the connection to the turntable of the trailer. What danger exists if the bearing bushings have bearing play?

The rear axle of the trailer can tear off from the trailer

The trailer coupling can tear out of the cross member

The trailer can detach from the towing vehicle

The turntable of the trailer can tear off from the trailer

7 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

When must the towing eye on the drawbar of the trailer be replaced?

When the permissible dimensions specified in the operating manual of the drawbar are exceeded or not met

When the towing eye shows visible damage

When the width of the towing eye is greater than 45 mm

When the thickness of the towing eye is greater than 45 mm

8 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

You want to adjust the drawbar length on a trailer of vehicle class O4. What must you pay attention to regarding the dimensions of the vehicle combination?

The vehicle combination must not be shorter than 16.25 m

The vehicle combination must not be longer than 18.75 m

The vehicle combination must not be shorter than 12.00 m

The distance between the rear axle of the towing truck and the front axle of the trailer must be at least 3.00 m

9 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

What must you pay attention to when maintaining an automatic closing trailer coupling?

When I grease the trailer coupling, the coupling bolt should be raised

After I have greased the trailer coupling, I must not touch the operating lever anymore

When I grease the trailer coupling, the trailer coupling should be closed

If I have cleaned the trailer coupling with a high-pressure cleaner, the trailer coupling must be re-greased

10 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

You have uncoupled a trailer wagon. How far may the towing eye of the drawbar of the trailer drop to the ground at most?

The distance to the ground must be at least 20 cm

The distance to the ground must not be less than 10 cm

The distance to the ground must be at least 50 cm

The towing eye must always remain at the height of the trailer coupling of the truck

11 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

Your trailer has turntable steering. At what intervals should you grease the turntable?

This is basically determined by the specifications in the operating manual of the trailer

Once a week

Once a day

Once a month

12 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

The fifth wheel coupling on your tractor unit is not designed for low maintenance and must be greased by hand. What do you pay attention to?

I grease the locking hook and locking bolt of the fifth wheel coupling

I grease the guide of the pull handle of the fifth wheel coupling

Before greasing, I clean the top of the coupling plate

I grease the top of the coupling plate

13 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

Your trailer has turntable steering. What must you regularly check or maintain on the turntable?

The wear

The paint coating

The lubrication

Whether visible damage or corrosion is present

14 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

What should you check on the drawbar of a turntable-steered trailer?

The paint coating of the drawbar

Whether the wear of the towing eye is too great

Whether the drawbar has cracks or bends

The play in the bearing bushings of the drawbar at the connection to the turntable of the trailer

15 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 2

You are checking the play in the bearing bushings of the drawbar at the connection to the turntable of the trailer. What bearing play is permissible?

Generally, no longitudinal play is permissible

Up to 2 mm of longitudinal play

Up to 4 mm of lateral bearing play

The bearing play may be as large as specified in the operating manual of the trailer

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Class E (Truck) -4- Coupling, Uncoupling – Level 2