Question

D. Answer the following questions.
1. Why are walls and roofs sprayed with water everyday?
2. Why are bricks used for making buildings?
3. Why are raw bricks baked?
4. Name the different types of bridges.​

Answer 1

Answer:

Answers to the questions.

Explanation:

Ans 1:Water is required to be sprayed on newly built walls / columns, in order that the hydration of the cement in the concrete, goes on uniterrupted .Hydration of the cement is what gives the concrete its compressive strength. Enough water must be there to not only make concrete workable but also to make the hydration process continue.

Ans2:Walls made of bricks help adjust the building's temperature, as they store heat and cool air.Besides comfort, a building made of bricks also has some financial advantages. Houses made entirely out of brickwork cost less in the long run, because they need less energy for heating.

Ans3:The hotter the sun, the stronger the brick would be. Oven-baked bricks were made by the same process. When the bricks were dried throughout, they were stacked in ovens called kilns, which were heated by fire.The clay particles became partly melted and fused together, making the brick hard and strong.

Ans4:Six Bridge Types

1. Beam.
2. Truss.
3. Arch.
4. Cantilever.
5. Suspension.
6. Cable Stayed.