Class E (Truck) -4- Coupling, Uncoupling - Level 1

1 of 3 Levels

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Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

You are supposed to couple a semi-trailer to a tractor unit. What must you pay attention to before coupling?

I make sure that the clearance between the frame end of the tractor unit and the landing gear is sufficient

I make sure that the clearance between the rear wall of the cab and the front end of the semi-trailer is sufficient

I make sure that the upper coupler plate of the semi-trailer is about 5 cm above the height of the coupling plate of the fifth wheel coupling

I make sure that the semi-trailer is secured with the parking brake and at least one wheel chock

2 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

Your truck has an automatic closing trailer coupling. What danger exists if the coupling bolt of the trailer coupling of the truck has too much vertical play?

The trailer coupling can tear out of the cross member

The trailer will tend to sway

The trailer coupling can open during driving

The trailer can detach from the towing vehicle

3 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

Your tractor unit has air suspension. How can you adjust its height?

The axle must be adjusted in height with a hand crank for this purpose

The spring components must be operated with a hand crank for this purpose

The air pressure in the tires must be changed for this purpose

There is a control panel in the cab for this purpose

4 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

How can you open a fifth wheel coupling?

There are electropneumatically operated systems. I can open the fifth wheel coupling from the cab

There are manually operated fifth wheel couplings with latch safety. I open the latch with one hand and pull out the pull handle completely with the other hand. Then I hook it on the edge of the coupling plate

There are electromagnetically controlled systems. I can control the fifth wheel coupling via an app

There are one-hand operations. I pull the pull handle beyond the lock and move it forward. Then I hook it on the edge of the coupling plate

5 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

You are supposed to couple a semi-trailer to a tractor unit. You notice that the clearances between the tractor unit and the semi-trailer are not sufficient. How should you behave?

If my tractor unit does not have a sliding fifth wheel coupling, I inform my supervisor. A different vehicle combination is necessary for this transport order

I couple carefully and then only drive curve radii that are just possible without causing damage to the landing gear

I couple carefully and then only drive curve radii that are just possible without causing damage to the rear wall of the cab

If my tractor unit has a sliding fifth wheel coupling, I adjust it accordingly

6 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

Your truck has an automatic closing trailer coupling. What danger exists if the trailer coupling has too much vertical play in the cross member of the truck?

The trailer will tend to pitch oscillations

The trailer will tend to oscillate

The trailer coupling can tear out of the cross member

The trailer can detach from the towing vehicle

7 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

What dangers exist if the play between the coupling bolt on the towing vehicle and the towing eye is too great?

The trailer could tear off

The trailer could start to sway

During driving, strong impacts can occur that could shear off the drawbar on the trailer

During driving, strong impacts can occur that could shear off the coupling bolt on the towing vehicle

8 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

Your truck has an automatic closing trailer coupling. What danger exists if the trailer coupling has too much longitudinal play in the cross member of the truck?

The trailer will tend to sway

The trailer can detach from the towing vehicle

The trailer will tend to oscillate

The trailer coupling can tear out of the cross member

9 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

Your truck has an automatic closing trailer coupling. What limit value is permissible for wear?

The trailer coupling may have at most 4 mm of vertical play in the cross member of the truck

The trailer coupling must have no vertical play in the cross member of the truck

The trailer coupling may have at most 10 mm of vertical play in the cross member of the truck

The trailer coupling in the cross member of the truck may only have as much vertical play as specified in the operating manual of the trailer coupling

10 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

You have coupled a trailer to a truck. How can you tell that the connection is securely closed?

By an electrical or electronic remote indicator in the cab of the truck

By the fact that the operating lever of the trailer coupling is horizontal

By a control pin on the trailer coupling of the truck

By an electrical remote indicator at the rear of the truck

11 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

You have coupled a semi-trailer to a tractor unit. How can you tell that the connection is securely closed?

By the fact that a light on the coupling plate near the handle lever flashes

By the fact that the locking pin of the fifth wheel coupling no longer protrudes beyond the locking edge

By the fact that with electropneumatic operation of the fifth wheel coupling, a green indicator light illuminates in the cab

By the fact that the latch safety on the handle lever engages

12 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

You are supposed to couple a semi-trailer to a tractor unit. You notice that you need to adjust the height of the semi-trailer to match that of the tractor unit. How should you behave?

I can adjust the leaf suspension on the tractor unit accordingly with a crank

I can adjust the landing gear accordingly with a crank

If the tractor unit has air suspension, I can use it for height adjustment

If the tractor unit has a height-adjustable fifth wheel coupling, I can use it for height adjustment

13 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

Your truck has an automatic closing trailer coupling. What limit value is permissible for wear?

The trailer coupling must have no longitudinal play in the cross member of the truck

The trailer coupling may have at most 5 mm of longitudinal play in the cross member of the truck

The trailer coupling may have at most 10 mm of longitudinal play in the cross member of the truck

The trailer coupling may have at most 15 mm of longitudinal play in the cross member of the truck

14 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

What checks must you regularly perform on the drawbar of a trailer?

Whether the drawbar is cracked or bent

Whether the drawbar has rust spots

That the tip of the drawbar in the uncoupled state drops no more than 20 cm above the ground

Whether the wear of the towing eye is too great

15 / 15

Category: Class E (Truck) -4- Coupling, Uncoupling - Level 1

Your truck has an automatic closing trailer coupling. What limit value is permissible?

The vertical play of the coupling bolt in the trailer coupling of the truck may be at most 5 mm

The coupling bolt in the trailer coupling of the truck must have no vertical play

The vertical play of the coupling bolt in the trailer coupling of the truck may be at most 4 mm

The vertical play of the coupling bolt in the trailer coupling of the truck may be as large as specified in the operating manual of the trailer coupling

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Class E (Truck) -4- Coupling, Uncoupling – Level 1