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Title : Class 7 Engineering Semester 1 Engineering Materials
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Class 7 Engineering Semester 1 Engineering Materials
[ad_1]Engineering Workshop Material for Class 7 Semester 1 ...
The following is Engineering Workshop Material for Class 7 Semester 1 as learning material in class.
Simple water purifier
6th Meeting 9
1. Water filtration or purification techniques are carried out with the aim that the water does not contain toxic substances or hazardous chemicals.
2. Water filtration can be done with the following technologies.
a. Cotton cloth filter
b. Cotton filter
c. Aeration
d. Slow Sand Filter (SPL)
e. Quick Sand Filter (SPC)
f. Grafity-Fed Filtering System
g. Charcoal filter
h. Simple / traditional water filter
i. Ceramic filter
j. Rock / sieve / stone mortar filter
3. Water purification equipment can be made by filtration, decantation and centrifugation.
4. Making water filters can be done in the following way.
a. Gather materials and tools used.
b. Draw a water filter tool schematic.
c. Making a water filter.
d. Do the test.
5. Filtration is a method of separating mixtures used to separate liquids and insoluble solids based on differences in particle size of mixed substances. Example: 1. Separation of impurities in the sugar solution. 2. Filtering river water for clean water purposes
6. Distillation (Distillation) is the separation of a mixture of liquid substances based on differences in the boiling points of liquid substances in the mixture. Example: Separation of alcohol from water.
Instrument / question :
1. Explain the difference between filtration and distillation!
2. In chemical water purification, coagulant is usually added. What do you know about the coagulant?
3. Mention the functions of the water filtration technology!
4. What is the purpose of aeration?
5. What do you know about natural mineral water?
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