NCERT Class 9 Skill Education Chapter 8 Additional Vocations

NCERT Class 9 Skill Education Chapter 8 Additional Vocations Solutions English Medium As Per New Syllabus. to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 9 Skill Education Chapter 8 Additional Vocations Notes and select need one. NCERT Class 9 Skill Education Chapter 8 Additional Vocations Question Answers Download PDF. NCERT Class 9 Skill Education Texbook Solutions.

NCERT Class 9 Skill Education Chapter 8 Additional Vocations

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. CBSE Class 9 Skill Education Textual Solutions in English Medium are part of All Subject Solutions. Here we have given NCERT Class 9 Skill Education Notes, CBSE Class 9 Skill Education in English Medium Textbook Solutions for All Chapters, You can practice these here.

Additional Vocations

Chapter: 8

TEXTUAL SOLUTIONS

A. Short Question Answer:

1. What does “forming” mean in sheet metal work? 

Ans: Forming is the process of shaping metal without cutting it.

2. What is a “burr”? 

Ans: A burr is a sharp, unwanted edge that remains on the metal after it has been cut.

3. What are the main materials used for sheet metal fabrication? 

Ans: GI (Galvanized Iron) or Aluminium sheets are the main materials used.

4. Which tools are used for manually cutting sheet metal? 

Ans: Tin snips or shears are used for manual cutting.

5. What is plumbing? 

Ans: Plumbing is the work of installing, maintaining, and repairing systems that carry water, liquids, gases, fluids, or waste through pipes. 

6. What is the purpose of a valve? 

Ans: A valve is a device used to control the flow of water. 

7. Which tools are used to tighten and loosen pipe joints? 

Ans: A pipe wrench or spanner is used for this purpose. 

8. How can you prevent water leakage at joints? 

Ans: By applying thread seal tape or adhesive. 

9. What tool is used to clear blocked drains? 

Ans: A plunger is used to clear blockages.

10. What does food processing involve? 

Ans: It involves transforming raw food materials into safe, usable, and longer-lasting products through activities like cleaning, cutting, drying, cooking, fermenting, and preserving. 

11. What is food “preservation”? 

Ans: Preservation refers to the methods used to increase the shelf life of food. 

12. What are common raw materials used in food processing? 

Ans: Unprocessed foods such as grains, fruits, vegetables, pulses, and milk.

13. What is “joinery”? 

Ans: Joinery refers to the methods used to join two or more parts of furniture together. 

14. What is “seasoned wood”? 

Ans: Wood that has been dried to reduce its moisture content. 

15. Which tools are used to check right angles and alignment? 

Ans: A try square or a spirit level. 

16. What hand tools are used for cutting and shaping wood or bamboo? 

Ans: Hand saws, chisels, and planes.

17. What is the purpose of “wedging” clay? 

Ans: Wedging means kneading the clay to remove air bubbles and ensure it has even moisture. 

18. What is “firing” in pottery? 

Ans: Firing is the process of heating clay in a kiln or open fire to make it hard and durable. 

19. What is “slip”? 

Ans: Slip is a mixture of clay and water used for joining parts together or for surface decoration. 

20. Why are sand or grog added to clay? 

Ans: They are added to improve the clay’s strength and reduce cracking.

B. Long Question Answer:

1. What are the key steps involved in creating a product using sheet metal work?

Ans: The process of creating a sheet metal product involves six main steps. First is scoping, where you choose a simple item to make, such as a dustpan, dustbin, or chalk box, and decide the quantity. Second is design and draw, which involves creating simple sketches of the product, marking dimensions, and deciding on the forming technique. Third, you make a prototype using cardboard to understand the design, especially the folds and joints. Fourth, you select materials and tools, such as GI/Aluminium sheets and tin shears for cutting. Fifth, you prepare the product by marking the sheet with a scriber, cutting the metal, and performing required actions like punching, riveting, folding, hammering, or soldering. Finally, you finish the product by smoothing the surfaces, trimming sharp edges, and applying colors.

2. Describe the quality and safety parameters that must be strictly followed while performing plumbing tasks.

Ans: In plumbing, maintaining both quality and safety is essential. For quality parameters, the work must result in leak-free joints with no dripping or seepage, and proper alignment so that pipes are laid straight and level. It also requires secure fittings (valves and fixtures fixed tightly), smooth water flow without blockages or air locks, and minimum waste of pipes and water. For safety parameters, plumbers must wear basic protective equipment like gloves and safety glasses, ensure their hands are dry while handling tools and fittings, and keep the work area clean and free of obstacles. All waste must also be disposed of according to protocol.