NCERT Class 9 Skill Education Chapter 6 Construction

NCERT Class 9 Skill Education Chapter 6 Construction 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 6 Construction Notes and select need one. NCERT Class 9 Skill Education Chapter 6 Construction Question Answers Download PDF. NCERT Class 9 Skill Education Texbook Solutions.

NCERT Class 9 Skill Education Chapter 6 Construction

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.

Construction

Chapter: 6

TEXTUAL SOLUTIONS

PORTFOLIO

1. What type of construction work will you take up in your school or community? Why? 

Ans: Because this is a personal portfolio question, the source does not provide a specific answer for you, but it suggests several examples of structures you could choose to build based on the needs of your school or community. These include a boundary wall, a shed, a ramp, a pavement, a wash basin, a fence, a flower bed, a tree guard, a handwash stand, or a bench.

2. Are there any specific considerations you will keep in mind? 

Ans: When scoping our work, we should consider the following:

Material and resource availability: Check if tools and materials (like bricks, sand, cement, water, or recycled materials) are available, cost-effective, and safe to handle.

Usefulness: Ensure the structure is actually useful for the school or community.

Location: Evaluate the available space, the safety of the area, its accessibility, and how easily you can transport tools and materials to the site.

6.12 Assess your learning 

1. Look around your school or neighbourhood, and identify any one structure. Identify the basic structural elements (foundation, walls, roof, beams or columns) that you can observe and describe their functions. 

Ans: While you must choose the specific building in your neighbourhood to observe, the sources list the basic structural elements and their functions to help you identify them:

Foundation: Provides a strong base to increase the building’s life, avoid cracks, and safeguard against earthquakes.

Walls: Made of bricks, stones, cement panels, or wood to enclose the space.

Beams: Horizontal structural elements that carry the heavy load of the upper floors (slab) or the roof.

Columns: Vertical elements that support the beams and transfer the building’s weight down into the foundation.

Roofs: The upper structural framework (rafters or trusses) designed to support the roof’s load and protect the interior from the weather.

Windows and doors: Openings that provide entry, natural light, and ventilation.

2. What kind of construction has been used for your house or school (Load-bearing construction or RCC construction)? Write the reasons for selecting particular types of construction. 

Ans: To help you answer this for your specific house or school, the text defines the two main types of construction:

Load-bearing construction: The walls themselves carry the entire weight of the roof and building, transferring it to the ground. This is chosen for single-storey houses because it is simple, costs less, and is easy to repair.

RCC (Reinforced Cement Concrete) construction: The building stands on a strong skeleton frame of concrete and steel columns and beams, which carry the load instead of the walls. This is chosen for multi-storey buildings because it is very strong and earthquake-resistant.

3. Suppose you are asked to construct a small boundary wall in your school. List the major steps you would include in the process chart and explain why sequencing of steps is important. 

Ans: The major steps in a construction process chart are:

Preparing the construction drawing.

Marking the drawing on the field (line out).

Preparation of the foundation.

Brick work.

Curing (keeping it wet to strengthen the construction).

Plastering.

Finishing and painting. 

Sequencing is critical because subsequent steps physically depend on the completion of earlier ones. For example, you must level the ground before marking it, you cannot lay bricks without a prepared foundation, and plastering and curing must happen after the bricks are laid to bind and protect the finished structure.

4. Identify three safety rules that must be followed at a construction site. Explain how ignoring any one of them could lead to an accident. 

Ans: Prevent water spills: Keep areas used for standing and walking dry. Ignoring this can easily lead to slipping and physical injury.

Handle bricks gently: Bricks should be stacked properly and never thrown around. Ignoring this can result in the bricks breaking or severely hurting someone upon impact.

Hold a chisel firmly: When cutting bricks or shaping stone, you must maintain a firm grip and keep your fingers away from the cutting edge. Ignoring this can result in striking or slicing your hand with the tool.

5. Cement was left exposed in the room during the rainy season for many months. What might happen to cement and why? 

Ans: The cement will become ruined and unusable. Cement must be stored in a dry place. When cement is exposed to water, it triggers a chemical reaction intended for bonding. The continuous moisture from the rainy season will cause the cement to harden permanently into a stone-like mass.

6. Often, during summer season, especially during a drought year, the Government bans construction activities. Why do you think this is done? 

Ans: Construction requires massive amounts of water. Not only is water required to mix cement, mortar, and concrete, but the structure must also undergo curing. Curing requires the new construction to be kept continuously wet or heavily sprinkled with water for 14 to 28 days to complete the chemical reaction that bonds the materials. During a drought, saving water is prioritized over these high-consumption activities.