Rolling Hitch MCQs Quiz | Class 9
This quiz is for Class 9 students studying NCC (Code 076) as per the CBSE curriculum. It covers key concepts from Navy Unit 3: Seamanship, focusing on the topic of the Rolling Hitch knot and its practical applications. Test your knowledge on how to tie and use this essential knot. After completing the quiz, click “Submit Quiz” to see your score and then use the “Download Answer PDF” button to save a copy of your performance.
Understanding the Rolling Hitch
The Rolling Hitch is a vital friction hitch used extensively in the Navy and general seamanship. Its primary characteristic is its ability to attach a rope to a spar, post, or another rope and grip firmly when pulled in one direction along the object’s length. It’s a “slide-and-grip” knot, meaning it can be slid along the object when not under load but will hold fast once tension is applied from the correct direction.
Key Concepts of the Rolling Hitch
- What is a Rolling Hitch? It’s a specialized knot for creating a temporary attachment point on a line or object. Unlike knots that secure a rope’s end, a hitch is designed to fasten a rope *around* something. The Rolling Hitch excels at gripping when pulled parallel to the object it’s tied on.
- How it Works (The Principle of Friction): The knot’s effectiveness comes from friction. The initial turns around the spar create a large surface area for grip. The final “biting” turn, which crosses over the standing part, cinches down and locks the knot in place when a load is applied, preventing it from slipping.
- Critical Application: Taking the Strain: One of its most important uses is to relieve tension from a jammed or fouled line. For example, if an anchor chain is stuck in a winch, a heavy rope can be attached to the chain below the winch using a Rolling Hitch. This new rope can then take the anchor’s strain, allowing the winch to be safely cleared.
- Directional Grip: It is crucial to remember that the Rolling Hitch is directional. It will only hold when pulled in the direction away from its final tuck. If pulled from the opposite direction, it will loosen and slide.
Rolling Hitch vs. Clove Hitch
While they may look similar to a novice, their applications are quite different, especially when dealing with lengthwise pulls.
| Feature | Rolling Hitch | Clove Hitch |
|---|---|---|
| Primary Use | Pulling along a spar, taking strain | Securing a line to a post (end-of-line) |
| Directional Grip | Grips firmly in one direction | Grips best with pull at 90 degrees to the post |
| Security | More secure against lengthwise slipping | Can slip or roll if pulled along the spar |
| Ease of Tying | Slightly more complex | Very quick and simple to tie |
Quick Revision Points
- The Rolling Hitch is a friction hitch.
- It grips only when pulled in the correct direction (along the spar).
- It is essential for taking the strain off a loaded line or chain.
- Do not confuse it with a Clove Hitch; the Rolling Hitch has superior lengthwise grip.
- It is generally easy to untie, even after being subjected to a heavy load (non-jamming).
Extra Practice Questions
- Why is a Rolling Hitch preferred over a Clove Hitch for towing a spar?
- Describe a scenario on a naval vessel where you might need to use a Rolling Hitch to clear a fouled line.
- What is the difference between a friction hitch and a bend (like a Sheet Bend)?
- If your Rolling Hitch is tied correctly but still slips, what might be the issue with the surface it’s tied to? What could you do to improve its grip?
- Can a Rolling Hitch be used to join two ropes together end-to-end? Why or why not?
