NCERT Class 9 Skill Education Important Chapter 5 Shaping Materials

NCERT Class 9 Skill Education Important Chapter 5 Shaping Materials 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 Important Chapter 5 Shaping Materials Notes and select need one. NCERT Class 9 Skill Education Important Chapter 5 Shaping Materials Question Answers Download PDF. NCERT Class 9 Skill Education Additional Solutions.

NCERT Class 9 Skill Education Important Chapter 5 Shaping Materials

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 Additional Notes English Medium are part of All Subject Solutions. Here we have given NCERT Class 9 Skill Education Additional Notes, CBSE Class 9 Skill Education Important Solutions for All Chapters, You can practice these here.

Shaping Materials

Chapter: 5

IMPORTANT SOLUTIONS

A. Long Question Answer:

1. What is the primary purpose of safety signage?

Ans: The purpose of safety signs is to prevent accidents and injuries by providing clear, visual information about potential hazards and emergency procedures.

2. What does the colour yellow indicate in safety signage?

Ans:: Yellow indicates warnings and physical hazards, such as a wet floor or a construction site.

3. How is glass made?

Ans: Glass is created simply by heating fine sand to very high temperatures until it melts.

4. What measuring tool should be used to measure the diameter or thickness of a small object?

Ans: Vernier callipers are best suited for this task.

5. What is the “least count” of a measuring instrument?

Ans: The least count is the smallest value that can be accurately measured using that specific instrument.

6. What does “tolerance” refer to in measurement?

Ans: Tolerance is the acceptable amount of error that can be allowed in a measurement.

7. Which measuring instrument is used to measure land?

Ans: A surveyor’s tape is used to measure land.

8. What is artificial spider silk made from?

Ans: It is an engineered material created using bacteria that are fed on sugar, resulting in a biodegradable fabric that is five times stronger than steel by weight.

9. In a construction technical drawing, what is the top view of a building called?

Ans: The top view, which shows the details of the floor layout, is called a Plan.

10. What is the front view of a building called in construction drawings? 

Ans: The front view is known as the Elevation.

11. What does a scale of 1:100 mean on a technical drawing?

Ans: It means that 1 unit of measurement on the drawing is equal to 100 units in real life.

12. What does the colour red indicate on safety signs?

Ans: Red is used to indicate fire hazards or prohibition, such as the location of a fire extinguisher or a stop button.

13. Q: Name two famous examples of ancient Indian craftsmanship.

Ans: Two examples are the Iron Pillar of Delhi and the rock-cut caves of Ellora.

14.  What was unique about the bricks used in the ancient Sindhu-Sarasvatī civilisation?

Ans: Harappans mass-produced bricks of a standard size to ensure a perfect fit and uniform strength for their houses.

15. What is “value addition” in manufacturing?

Ans: Value addition occurs when raw materials are transformed into useful products through various processes, substantially increasing their monetary worth.

16. How do “smart systems” protect workers in modern industries?

Ans: Smart helmets and vests are equipped with sensors that monitor a worker’s heart rate, body temperature, and posture, giving a warning if dangerous levels are reached.

17. What manufacturing process was used to make the intricate copper and brass ‘Dancing Girl’ statue?

Ans: The statue was created using a process called casting.

18. What is obsidian?

Ans: Obsidian is a naturally occurring glass formed from volcanic lava, and it can be 500 times sharper than a surgeon’s steel scalpel.

19. What is the specific name for technical drawings used in electrical work?

Ans: Technical drawings of electric circuits are called circuit diagrams.

20. What do blue safety signs indicate?

Ans: Blue safety signs indicate mandatory actions, such as the requirement to wear a safety helmet or protective footwear.

B. Long Question Answer:

1. What does the concept of “value addition” mean in the context of shaping materials, and how is it demonstrated through the processing of raw cotton and metal scrap?

Ans: Value addition refers to the increase in worth that occurs when raw materials are transformed from their natural state into useful, finished products through various manufacturing processes. For instance, raw cotton costs significantly less in its natural form, but as it goes through the value chain—spinning it into yarn, weaving it into fabric, and tailoring it into a garment—its value increases substantially, culminating in a much higher retail price for a finished shirt. Similarly, the value of basic metal scrap can be significantly increased by converting it into a kitchen utensil. This involves melting and moulding the metal into the desired shape, polishing or coating it with anti-stick materials, attaching wooden handles for better grip, and processing the bottom to make it induction-friendly.