Can you answer the following questions? Drinking water supply. why do we have to

Question

Can you answer the following questions?

Drinking water supply. why do we have to treat all drinking water fed to a piping system serving a large community , Check all that apply i. Legal requirement ,i. Raw water can still hurt us no matter where it comes from iii: All source water is hard and has to be softened vi. No one wants any chemicals at all in their drinking water b. What are the common sources of potable drinking water supply and the characteristics of each type of source? Compare and contrast these. 7. If we are treating a raw water with alum: a. Alum uses up alkalinity when added to water. True / False/ b. Chlorine is the most used disinfectant compound True? False/ c. Turbidity is okay in drinking water even if it is very clearly visible. True? False? d. Flocculation/Coagulation is used to reduce the electric charge on the very small particles present in raw water. True? False e. Once these charges are reduced it becomes harder for the particles to coalesce and bind together? True False

Explanation / Answer

a) why do we have to treat all drinking water fed to a piping system serving a large community -

i. Legal requirement - YES

i. Raw water can still hurt us no matter where it comes from - YES

iii: All source water is hard and has to be softened - NO

vi. No one wants any chemicals at all in their drinking water - YES

b) Potable water is available in almost all populated areas of Earth. These include -

Groundwater is the water located beneath Earth's surface and in the fractures of rock formations. Groundwater is recharged from, and eventually flows to, the surface naturally; natural discharge often occurs at springs and seeps, and can form oasis or wetlands. There are a certain setbacks of groundwater, As water moves through the landscape, it collects soluble salts, mainly sodium chloride. Where such water enters the atmosphere through evapotranspiration, these salts are left behind. groundwaters have also been polluted in many parts of the world.

The main forms of precipitation include drizzle, rain, snow, and hail. These can be used for drinking as well as agricultural purposes.

Surface water is water on the surface of the planet such as in a stream, river, lake, wetland, or ocean. It can be contrasted with groundwater and atmospheric water.

Non-saline surface water is replenished by precipitation and by recruitment from ground-water. Surface water can be lost through evaporation,seepage into the ground where it becomes ground-water, used by plants for transpiration, extracted by mankind for agriculture, living, industry etc. or discharged to the sea where it becomes saline.

7. a) True

b) True

c) False

d) True

e)False

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