Get premium membership and access questions with answers, video lessons as well as revision papers.
Screening
Water from lakes, rivers or the ground passes through a screen as it enters the water
treatment plant. When the water source is a lake or river, the screen serves an
important function, keeping out large natural contaminants such as plants and wood,
or fish. If ground water is used, screening may not be necessary since the water has
passed through layers of the earth in what is essentially a natural screening function.
Coagulation and Flocculation
Coagulation and flocculation are often the first steps in water treatment. Chemicals
with a positive charge are added to the water. The positive charge of these chemicals
neutralizes the negative charge of dirt and other dissolved particles in the water. When
this occurs, the particles bind with the chemicals and form larger particles, called floc.
Sedimentation
During sedimentation, floc settles to the bottom of the water supply, due to its weight.
This settling process is called sedimentation.
Filtration
Once the floc has settled to the bottom of the water supply, the clear water on top will
pass through filters of varying compositions (sand, gravel, and charcoal) and pore
sizes, in order to remove dissolved particles, such as dust, parasites, bacteria, viruses,
and chemicals.
Disinfection/Chlorination
After the water has been filtered, a disinfectant (for example, chlorine, chloramine)
may be added in order to kill any remaining parasites, bacteria, and viruses, and to
protect the water from germs when it is piped to homes and businesses.
- Other processes could include fluoridation and addition of lime to reduce
hardness
Storage
- Treated water is stored in large tanks before distribution
marto answered the question on November 6, 2019 at 11:02
- The inventory for Kipsinende farm as at 01.06.2011.(Solved)
The inventory for Kipsinende farm as at 01.06.2011.
Required: Prepare a balance sheet for the farm.
Date posted: November 6, 2019. Answers (1)
- Name two types of inventory records in the farm.(Solved)
Name two types of inventory records in the farm.
Date posted: November 6, 2019. Answers (1)
- The diagrams below illustrate some soil structures. Study them and answer the questions that follow.(Solved)
The diagrams below illustrate some soil structures. Study them and answer the questions that follow.
(a) Identify the soil structures F and G.
(b) Name the part labeled X and Y in diagram F.
(c) State two ways through which structure G influence crop production.
Date posted: November 6, 2019. Answers (1)
- Below is a diagram of a Common East African Weed.(Solved)
Below is a diagram of a Common East African Weed.
(i) Identify the weed illustrated above.
(ii) Give one harmful effect of the weed illustrated above to livestock.
(iii) State two methods of controlling the weed illustrated above
Date posted: November 6, 2019. Answers (1)
- The experiment below was set to compare the porosity and water holding capacity of three different types of soils(Solved)
The experiment below was set to compare the porosity and water holding capacity of three different types of soils
(i) Identify the soils in each of the following funnels labeled.
X:
Y:
Z:
(ii) Which of the types of soil can be said to have the highest porosity rate?
(iii) Give reasons for your answers in (ii) above.
(iv) Which type of soil would be suitable for planting paddy rice?
(v) Explain your answer in (iv) above.
Date posted: November 6, 2019. Answers (1)
- State four ways by which a farmer can make efficient use of a pasture crop.(Solved)
State four ways by which a farmer can make efficient use of a pasture crop.
Date posted: November 6, 2019. Answers (1)
- State four routine practices of care and management of trees.(Solved)
State four routine practices of care and management of trees.
Date posted: November 6, 2019. Answers (1)
- List four factors that will lower demand of a commodity.(Solved)
List four factors that will lower demand of a commodity.
Date posted: November 6, 2019. Answers (1)
- State four ecological requirements of tomatoes.(Solved)
State four ecological requirements of tomatoes.
Date posted: November 6, 2019. Answers (1)
- Name three diseases that attack cabbage.(Solved)
Name three diseases that attack cabbage.
Date posted: November 6, 2019. Answers (1)
- List five management practices carried out on a kale nursery two weeks after its establishment.(Solved)
List five management practices carried out on a kale nursery two weeks after its establishment.
Date posted: November 6, 2019. Answers (1)
- List any four pieces of information which should be shown on Health record.(Solved)
List any four pieces of information which should be shown on Health record.
Date posted: November 6, 2019. Answers (1)
- What causes milk fever in dairy cows?(Solved)
What causes milk fever in dairy cows?
Date posted: October 17, 2019. Answers (1)
- Below are some care and maintenance practices for a certain farm tool.
-Knobs should be replaced when worn out.
-Cap iron should be replaced when worn...(Solved)
Below are some care and maintenance practices for a certain farm tool.
-Knobs should be replaced when worn out.
-Cap iron should be replaced when worn out.
-Cutting edge should be sharpened on an oilstone when blunt.
a)Identify the tool.
b)Give three different types of the above named tool.
c)Name two other tools that can be used to do the same job as the above mentioned tools
Date posted: October 17, 2019. Answers (1)
- State four qualities of a good feed store.(Solved)
State four qualities of a good feed store.
Date posted: October 17, 2019. Answers (1)
- State the functions of each of the following components in a tractor engine.
Carburetor
Lift pump (Solved)
State the functions of each of the following components in a tractor engine.
Carburetor
Lift pump
Date posted: October 17, 2019. Answers (1)
- Name two diseases in livestock that may be spread through breeding. (Solved)
Name two diseases in livestock that may be spread through breeding.
Date posted: October 17, 2019. Answers (1)
- State two reasons why drenching alone is not an effective method of controlling liver fluke.(Solved)
State two reasons why drenching alone is not an effective method of controlling liver fluke.
Date posted: October 17, 2019. Answers (1)
- Distinguish between opening and closing valuation. (Solved)
Distinguish between opening and closing valuation.
Date posted: October 17, 2019. Answers (1)
- The following information was extracted from the farm records of Mukulu farm, as at 31/12/2014.
Prepare profit and loss account for Mukulu farm using the above...(Solved)
The following information was extracted from the farm records of Mukulu farm, as at 31/12/2014.
Prepare profit and loss account for Mukulu farm using the above information.
Date posted: October 17, 2019. Answers (1)