Fifth-wheel coupling

High school (ages 12+)
Transportation

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/fifth-wheel-coupling

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the coupling components?Kingpin (trailer underside) and Fifth Wheel receiver (towing vehicle rear)
2. What is the rotational mechanism?Trailer kingpin rotates on the lubricated surface of the tractor's fifth wheel
3. What is a fifth‑wheel coupling?The fifth‑wheel coupling is a special hook that lets a big truck pull a long trailer safely. It has a metal pin on the trailer and a horseshoe‑shaped plate on the truck that catches the pin.
4. How does the kingpin and fifth wheel work together?The trailer’s kingpin slides into the truck’s horseshoe plate. When the truck turns, the pin pivots inside the plate so the trailer can swing around the truck.

Articulation: The ability of the tractor and trailer to pivot relative to each other during turns.
Trailer Sway: Dangerous lateral oscillation of a trailer behind a towing vehicle.
Load Distribution: How the weight of the trailer is spread across the towing vehicle's axles.
Recreational Vehicle (RV): A vehicle equipped for temporary living, such as a camper or motorhome.