Class 9 Skill Education Kaushal Vikas Chapter 8 Additional Vocations (Unit II – Work with Machines and Materials) Solutions (NCERT 2026–27)
These Class 9 Skill Education Kaushal Vikas Chapter 8 solutions cover Additional Vocations, the closing chapter of Unit II – Work with Machines and Materials. This chapter introduces five more hands-on vocations — Sheet Metal Work, Plumbing, Food Processing, Furniture Making and Pottery — explaining the key words, common tools and materials, quality and safety parameters, and the step-by-step process for each. Use these notes, key terms, practice questions and MCQs to revise the whole chapter quickly.
Class 9 Skill Education Kaushal Vikas Chapter 8 – Overview
Chapter 8, Additional Vocations, completes Unit II (Work with Machines and Materials) by introducing five practical trades that turn raw materials into useful products. Sheet metal work shapes thin metal sheets by cutting, bending, forming, joining and finishing. Plumbing installs, maintains and repairs the pipe systems that carry water and waste. Food processing transforms raw food into safe, longer-lasting products through cleaning, cutting, drying, cooking, fermenting and preserving. Furniture making designs and builds useful objects like stools, shelves and tables. Pottery prepares clay, shapes it, dries it, hardens it by firing, and finishes the surface. For each vocation, the chapter lists common tools and materials, quality parameters, safety parameters and a clear set of key steps — building the habit of safe, planned and waste-conscious work.
Key Concepts & Notes
1. Sheet Metal Work
Sheet metal work involves shaping thin metal sheets (such as steel, aluminium and copper) into useful products by processes including cutting, bending, forming, joining and finishing. This work requires careful measurement, correct tool selection, safe handling of sharp edges, and attention to quality and finish.
| Item / Material name | Description / Use |
|---|---|
| GI / Aluminium sheet | Main material for fabrication |
| Fasteners / Rivets | Joining sheet metal parts |
| Cardboard / Paper | Prototype |
| Tin snips / Shears | Manual cutting of sheet metal |
| Hammer / Mallet | Shaping and forming |
| Files / Grinder | Smoothing sharp edges |
| Drill / Hand tools | Making holes |
| Measuring scale / Tape | Accurate measurement |
| Marking pen / Scriber | Marking layout |
| Safety gear | Gloves, goggles, apron |
| Quality parameters | Safety parameters |
|---|---|
| Accurate dimensions: proper measurement and marking | Wear safety gloves, goggles, ear plugs and apron while working |
| Smooth edges: burrs removed and edges finished | Use cutting and forming tools only as demonstrated |
| Strong joints: secure riveting or joining | Keep fingers away from cutting and bending zones |
| Proper shape: correct bends and alignment | Maintain a clean and organised workspace |
| Minimum waste: efficient use of material and reuse of scrap | Dispose waste as per protocol |
Key steps in the process: (1) Scoping — choose a simple item such as a dustpan, dustbin, chalk box or box clamps, and decide the quantity. (2) Design and draw — draw simple sketches, mark dimensions and decide the forming technique. (3) Make a prototype — use cardboard to get an idea of the design, especially folds and joints. (4) Select materials and tools — choose suitable sheet metal and cutting tools (tin shears). (5) Prepare the product — mark on the sheet using a scriber; cut the metal; use punching, riveting, folding and hammering, or soldering as required. (6) Finish the product — smooth surfaces, trim edges and apply colours.
2. Plumbing
Plumbing is the work of installing, maintaining and repairing systems that carry water, liquids, gases, fluids or waste through pipes. Plumbing includes planning pipe routes, selecting suitable materials, cutting and joining pipes, fitting taps and valves, checking water flow and repairing leakages.
| Item / Material name | Description / Use |
|---|---|
| Pipes (PVC / GI / CPVC) | Carrying water |
| Pipe fittings | Couplings, elbows, tees, end caps |
| Taps / Valves | Controlling water flow |
| Pipe wrench / Spanner | Tightening and loosening joints |
| Hacksaw / Pipe cutter | Cutting pipes to length |
| Thread seal tape / Adhesive | Preventing leakage at joints |
| Plunger | Clearing blocked drains |
| Measuring tape / Spirit level | Measuring and alignment |
| Cloth / Bucket | Cleaning and water collection |
| Safety gloves / Goggles | Personal safety |
| Quality parameters | Safety parameters |
|---|---|
| Leak-free joints: no dripping or seepage from pipes or fittings | Wear basic protective equipment, such as gloves and safety glasses |
| Proper alignment: pipes are laid straight and level | Keep hands dry while handling tools and fittings |
| Secure fittings: valves and fixtures are tightly fixed | Ensure the work area is clean and free of obstacles |
| Smooth water flow: no blockages or air locks | Dispose waste as per protocol |
| Minimum waste: efficient use of pipes, fittings and water |
Key steps in the process: (1) Scoping — observe plumbing systems through site visits, videos or interaction with plumbers, and choose a simple, safe task such as fixing a leaking tap, replacing a joint, clearing a blocked drain or installing a short pipe section. (2) Design and draw — study the water-flow path and prepare a simple sketch showing pipes, joints and fixtures. (3) Prepare a detailed plan — cover material selection, tool use, safety checks and execution. (4) Select materials and tools — identify suitable pipes, fittings and tools for the task. (5) Carry out the work — shut off the water supply; measure, cut and join pipes; tighten fittings; apply sealing material; fix fixtures carefully. (6) Finish the work — restore the water supply and check for leaks, blockages or improper flow.
3. Food Processing
Food processing involves transforming raw food materials into safe, usable and longer-lasting food products through simple activities such as cleaning, cutting, drying, cooking, fermenting and preserving.
| Item / Material name | Description / Use |
|---|---|
| Raw food materials | Grains, fruits, vegetables, pulses, etc. |
| Clean water | Washing and processing food |
| Knives / Peelers | Cutting and cleaning ingredients |
| Chopping board | Safe food preparation |
| Bowls / Containers | Mixing and holding ingredients |
| Stove / Heating source | Cooking or roasting (teacher-supervised) |
| Drying trays / Cloth | Drying food materials |
| Weighing scale / Cups | Measuring quantities |
| Packaging material | Jars, pouches, paper labels |
| Cleaning supplies | Cloth, soap, waste bins |
| Quality parameters | Safety parameters |
|---|---|
| Freshness: raw materials are clean and suitable for use | Wash hands thoroughly before handling food |
| Hygiene: processing is done in a clean and orderly manner | Keep work surfaces, tools and containers clean |
| Consistency: product has uniform texture, taste and appearance | Use knives, peelers and heat sources carefully |
| Safety: food is properly cooked, dried or preserved | Avoid cross-contamination between raw and processed food |
| Minimum waste: efficient use of food, water and materials | Store ingredients and finished products properly; dispose waste as per protocol |
Key steps in the process: (1) Scoping — choose a simple product such as roasted grains, dried vegetables, pickle, papad or a snack item. (2) Follow a recipe — list ingredients, check their quality and freshness, and organise the work area for cleaning, preparation, processing and packaging. (3) Prepare ingredients — wash, peel, cut or sort food materials following hygiene practices. (4) Carry out the work — perform the selected processing techniques (drying, roasting, cooking or fermenting) using safe methods, noting changes in colour, texture, smell and taste. (5) Finish the work — check the product for cleanliness, safety and consistency; pack it safely using clean containers or pouches and add simple labels if required.
4. Furniture Making
Furniture making involves designing and creating useful objects, such as stools, tables, shelves, benches, storage units and simple seating. Furniture making combines practical skills with creativity, while promoting responsible use of materials, reuse of waste wood or metal, and careful workmanship.
| Item / Material name | Description / Use |
|---|---|
| Wood / Bamboo / Engineered boards | Main material for furniture |
| Metal rods / Pipes (optional) | Frames or supports |
| Measuring tape / Steel rule | Measuring dimensions |
| Try square / Spirit level | Checking right angles and alignment |
| Hand saw / Chisel / Plane | Cutting and shaping material |
| Drill / Screwdriver | Making holes and fixing joints |
| Bench vice / Clamps | Holding parts securely |
| Hammer / Mallet | Assembling joints |
| Fasteners (nails, screws and bolts) | Joining parts |
| Sandpaper / Paint / Varnish | Finishing and protection |
| Waste bins | Safe disposal of scrap |
| Quality parameters | Safety parameters |
|---|---|
| Strength and stability: furniture can safely support its intended load | Wear basic protective equipment, such as gloves and safety glasses when required |
| Accuracy: measurements and joints fit properly | Keep tools sharp, clean and stored properly after use |
| Finish: surfaces are smooth and edges are safe | Keep the workspace clean and free of obstacles |
| Useability: furniture meets the user’s need comfortably | Dispose waste as per protocol |
| Material efficiency: recycling, minimum wastage and reuse of leftovers |
Key steps in the process: (1) Scoping — choose a simple product such as a stool, small table, shelf or box. (2) Design and draw — draw a simple sketch with dimensions; decide materials, joints and basic layout; digital tools may be used if available. (3) Prepare a prototype — make a test model using cardboard or paper to check shape, joints and stability. (4) Select materials and tools — choose locally available materials and suitable tools, considering strength, cost and safety. (5) Prepare the product — measure, mark, cut and shape parts carefully; join parts using nails, screws, glue or joints; check alignment and stability. (6) Finish the product — sand surfaces and apply paint, polish or varnish for protection and appearance.
5. Pottery
Pottery involves preparing clay, shaping it using simple techniques, drying it carefully, strengthening it through firing or hardening, and finishing the surface for use or decoration.
| Item / Material name | Description / Use |
|---|---|
| Clay (local) / Terracotta | Main material for pottery |
| Water | Softening clay and making slip |
| Sand / Grog | Improving strength and reducing cracks |
| Rolling pin / Paddles | Shaping clay |
| Wire cutter | Cutting clay lumps |
| Carving tools | Trimming and decoration |
| Sponges / Brushes | Smoothing and finishing |
| Moulds | Creating uniform shapes |
| Drying boards / Trays | Safe drying of products |
| Apron / Gloves | Personal safety and cleanliness |
| Quality parameters | Safety parameters |
|---|---|
| Material quality: clay is clean, well-prepared and suitable for the product | Use tools such as wire cutters and carving tools carefully |
| Uniform thickness: product walls are even and balanced | Keep hands, feet and work surfaces clean to avoid slipping |
| Finishing: surface is smooth and free from cracks | Follow safety instructions during firing or hardening processes |
| Minimum waste: clay and water are reused wherever possible | Avoid inhaling clay dust; clean surfaces with wet cloths |
| Stability: base is flat and the product stands firmly | Wear basic protective gear, such as an apron or gloves if required; dispose waste as per protocol |
Key steps in the process: (1) Scoping — choose a simple item such as a diya, bowl, cup, tile or planter, and decide the quantity. (2) Design and draw — draw simple sketches, mark dimensions and decide the forming technique. (3) Make a prototype — create a small test piece to observe cracking, drying behaviour and strength. (4) Select materials and tools — select suitable clay, knead and wedge it to remove air and control moisture, and procure the tools required. (5) Prepare the product — use pinch, coil, slab or mould techniques, join parts using slip, maintain even thickness and allow slow, shaded drying, monitoring for cracks or warping. (6) Finish the product — smooth surfaces, trim edges and apply simple textures or natural colours. (7) Strengthen the product — harden it through kiln firing, open firing or extended sun drying, following safety norms. (8) Finish and decorate — smooth surfaces, trim edges and apply simple textures or natural colours.
Key Terms
| Term | Meaning |
|---|---|
| Forming | Shaping metal without cutting it. |
| Burr | Sharp, unwanted edge left after cutting metal. |
| Rivet | A fastener used to join metal sheets. |
| Gauge | The thickness of a sheet. |
| Valve | A device used to control water flow. |
| Joint | The connection point between two pipes or fittings. |
| Flow | The movement of water through a pipe system. |
| Raw material | Unprocessed food such as grains, fruits, vegetables or milk. |
| Processing | To clean, cut, cook or preserve raw material. |
| Preservation | Methods used to increase the shelf life of food. |
| Joinery | Methods used to join two or more parts of furniture. |
| Seasoned wood | Wood that has been dried to reduce moisture. |
| Finishing | Final surface treatment such as sanding, polishing or painting. |
| Wedging | Kneading clay to remove air bubbles and ensure even moisture. |
| Firing | Heating clay in a kiln or open fire to make it hard and durable. |
| Slip | Clay mixed with water, used for joining parts or surface decoration. |
Textbook Exercise / Activity Solutions
Note: Chapter 8 of Kaushal Vikas is a content/vocational chapter that introduces five additional vocations. The official NCERT text reproduced above does not carry a separate end-of-chapter exercise (no numbered “Exercises”, “Questions” or “Let us assess” section). Its learning tasks are the practical “key steps in the process” for each vocation. These are guided below as worked activities, and a full set of original practice questions, MCQs and Assertion–Reason items follows for exam preparation.
Activity 1. Plan a simple sheet metal product (e.g. a dustpan) by listing the six key steps you would follow.
Activity 2. Identify a simple, safe plumbing task in your home or school and describe how you would carry it out safely.
Activity 3. Choose one food-processing product and outline the steps you would follow to make it hygienically.
Activity 4. Compare any two of the five vocations in this chapter on the basis of their main material and one quality parameter.
Extra Practice Questions
Short Answer Type Questions
Q1. What is sheet metal work?
Q2. Define a burr and state why it must be removed.
Q3. Why must the water supply be shut off before carrying out a plumbing task?
Q4. List any three quality parameters for food processing.
Q5. What is wedging in pottery, and why is it done?
Long Answer Type Questions
Q1. Describe the six key steps in the sheet metal work process.
Q2. Explain the importance of safety and quality parameters in any vocation studied in this chapter.
Q3. Compare furniture making and pottery in terms of materials, tools and finishing.
MCQs & Assertion–Reason
1. Sheet metal work mainly involves shaping thin metal sheets by:
(a) only painting them (b) cutting, bending, forming, joining and finishing (c) melting them fully (d) burying them
2. A rivet is used in sheet metal work to:
(a) measure thickness (b) smooth edges (c) join metal sheets (d) mark layout
3. The thickness of a metal sheet is called its:
(a) burr (b) gauge (c) rivet (d) slip
4. In plumbing, a valve is a device used to:
(a) cut pipes (b) control water flow (c) clear blocked drains (d) measure length
5. Before carrying out a plumbing task, you should first:
(a) paint the pipes (b) shut off the water supply (c) remove all tools (d) open all taps
6. Food processing means transforming raw food into safe, usable products through:
(a) cleaning, cutting, drying, cooking, fermenting and preserving (b) only selling it (c) only storing it raw (d) throwing it away
7. Cross-contamination in food processing should be avoided between:
(a) two clean bowls (b) raw and processed food (c) water and labels (d) trays and cloth
8. In furniture making, seasoned wood means wood that has been:
(a) freshly cut (b) dried to reduce moisture (c) painted (d) soaked in water
9. In pottery, slip is:
(a) a sharp tool (b) clay mixed with water for joining or decoration (c) a kiln (d) a type of furniture joint
10. Firing in pottery is done to:
(a) cut clay lumps (b) soften the clay (c) make the clay hard and durable (d) colour the surface
For each Assertion–Reason question, choose: (A) Both true and the Reason correctly explains the Assertion; (B) Both true but the Reason is not the correct explanation; (C) Assertion true, Reason false; (D) Assertion false, Reason true.
A-R 1. Assertion: Burrs are smoothed off after cutting sheet metal.
Reason: A burr is a sharp, unwanted edge that can cause cuts and gives a poor finish.
A-R 2. Assertion: A plumber shuts off the water supply before cutting or joining pipes.
Reason: Shutting off the supply keeps the work area dry and lets joints be sealed properly.
A-R 3. Assertion: Wedging is done to colour the clay.
Reason: Wedging removes air bubbles and ensures even moisture in the clay.
A-R 4. Assertion: In food processing, raw and processed food should be kept apart.
Reason: Keeping them apart avoids cross-contamination and keeps the food safe.
A-R 5. Assertion: Furniture must have strength and stability.
Reason: Furniture should be able to safely support its intended load.
Exam Tips & Common Mistakes
How to score full marks in this chapter
Learn the five vocations and their main material and one key word each (sheet metal – rivet/gauge/burr; plumbing – valve/joint/flow; food processing – raw material/processing/preservation; furniture – joinery/seasoned wood/finishing; pottery – wedging/firing/slip). For any “describe the process” answer, give the steps in order (scoping → design/draw → prototype/plan → select materials and tools → prepare/carry out → finish) and always add the relevant safety and quality parameters. Using the book’s own examples (dustpan, leaking tap, pickle, stool, diya) shows you have read the chapter.
Common mistakes to avoid
- Mixing up the key words between vocations — e.g. calling clay-with-water a “rivet” instead of slip.
- Writing the process steps out of order or skipping the prototype step.
- Forgetting to mention safety gear (gloves, goggles, apron) in practical answers.
- Confusing a quality parameter (what the product should be like) with a safety parameter (how to work safely).
- Forgetting to state “shut off the water supply first” in any plumbing answer.
- Ignoring “minimum waste / reuse of scrap”, which is a quality parameter in every vocation.
Frequently Asked Questions
What is Class 9 Skill Education Kaushal Vikas Chapter 8 about?
Chapter 8, Additional Vocations, is the last chapter of Unit II (Work with Machines and Materials). It introduces five hands-on vocations — sheet metal work, plumbing, food processing, furniture making and pottery — with their key words, common tools and materials, quality and safety parameters, and step-by-step processes.
Which five vocations are covered in this chapter?
Sheet Metal Work, Plumbing, Food Processing, Furniture Making and Pottery. For each one the book lists the materials and tools, quality parameters, safety parameters and the key steps in the process.
Does Chapter 8 of Kaushal Vikas have an end-of-chapter exercise?
No. It is a vocational content chapter, so instead of a numbered exercise its learning tasks are the practical “key steps in the process” for each vocation. This page guides those activities and adds original practice questions, MCQs and Assertion–Reason items for exam preparation.
Are these Class 9 Kaushal Vikas Chapter 8 solutions free?
Yes. All solutions are free and follow the official NCERT Kaushal Vikas Skill Education textbook for 2026–27.
Accuracy note: chapter content (key words, tool/material tables, quality and safety parameters, and key steps) is reproduced faithfully from the official NCERT Kaushal Vikas textbook; all answers, activities, MCQs and Assertion–Reason items are original and expert-checked for the 2026–27 session.