NCERT Class 9 Skill Education Kaushal Vikas: Chapter 8 — Additional
This chapter introduces students to two vocational trades: Sheet Metal Work and Plumbing. Sheet Metal Work focuses on shaping thin metal sheets into useful products through cutting, bending, forming, joining, and finishing. It emphasizes accurate measurement, tool selection, safety with sharp edges, and quality control. Key steps include scoping, design, prototyping with cardboard, material selection, preparation, and finishing. Plumbing involves installing, maintaining, and repairing systems that transport water, liquids, gases, or waste through pipes. This includes planning routes, material selection, pipe joining, fitting fixtures, and leak repair. The chapter highlights essential keywords, materials, tools, quality, and safety parameters for both vocations, providing a foundational understanding for students interested in these skill-based careers.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 9 |
| Subject | Skill Education |
| Book | Kaushal Vikas |
| Chapter | Chapter 8 — Additional |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 2 minutes |
| Word count | 319 |
Learning outcomes
- Understand the basic processes involved in sheet metal work.
- Identify key tools, materials, and safety precautions for sheet metal work.
- Recognize the scope and activities involved in plumbing.
- List essential keywords and components related to plumbing systems.
Vocabulary
| Word | Meaning |
|---|---|
| Forming | Shaping metal without cutting it. |
| Burr | Sharp unwanted edge after cutting. |
| Rivet | Fastener used to join metal sheets. |
| Gauge | Thickness of a sheet. |
| Valve | Device used to control water flow. |
| Joint | Connection point between two pipes or fittings. |
| Flow | Movement of water through a pipe system. |
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Practice questions
- What is the primary material used in sheet metal work? Answer: Thin metal sheets like GI/Aluminium.
- What is a 'burr' in sheet metal work? Answer: A sharp unwanted edge after cutting.
- Name two safety gears essential for sheet metal work. Answer: Safety gloves and goggles.
- What is the main function of a valve in plumbing? Answer: To control water flow.
- What is the purpose of making a prototype with cardboard? Answer: To get an idea of the design, especially folds and joints, before working with metal.
Frequently asked questions
What does sheet metal work involve?
It involves shaping thin metal sheets into useful products using processes like cutting, bending, forming, joining, and finishing.
What are some essential tools for sheet metal work?
Essential tools include tin snips/shears for cutting, hammer/mallet for shaping, files/grinder for smoothing, and a measuring scale/tape for accurate measurement.
Why is a prototype important in sheet metal work?
A prototype, often made of cardboard, helps visualize the design, especially folds and joints, before working with actual sheet metal.
What is plumbing?
Plumbing is the work of installing, maintaining, and repairing systems that carry water, liquids, gases, or waste through pipes.
What are the key quality parameters for sheet metal products?
Key quality parameters include accurate dimensions, smooth edges, strong joints, proper shape, and minimum waste.
What safety precautions should be taken during sheet metal work?
One should wear safety gloves, goggles, and an apron, use tools as demonstrated, keep fingers away from cutting/bending zones, and maintain an organized workspace.
Related resources
Important topics
Topics covered
NCERT Class 9 Skill Education — Kaushal Vikas — Chapter 8 — Additional. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.