- 1 What Is The Difference Between Mechanical And Chemical Processes Under Preliminary Processing 2 How Would You Descr 1 (95.37 KiB) Viewed 45 times
- 1 What Is The Difference Between Mechanical And Chemical Processes Under Preliminary Processing 2 How Would You Descr 2 (142.01 KiB) Viewed 45 times
1. What is the difference between Mechanical and Chemical Processes under preliminary processing? 2. How would you describe “Material Processing"? 3. How would you differentiate "Soft Goods" from "Hard Goods”? Give five (5) examples for each classification. 4. What is meant by the term "Alloying"? 5. What are the two (2) major functions in processing a raw material into a finished product? Describe briefly each function. 6. How does forming and shaping processes are performed on the material in liquid and solid states? Explain each. 7. What are the four (4) major steps in Casting/Molding? Describe briefly each step. 8. With reference to the illustration given below, explain the basic steps in processing metallic raw materials. 9. Discuss how the mixing and melting processes were undertaken in glass making? 10. Explain the five (5) basic methods employed in shaping a glass. 11. What is "thermal tempering"? Explain. 12. How does smelting process separate the pure metal from its impurities? 13. Describe in detail the basic principle of a smelting process using charts and drawings. 14. State why the degree of concentration of mineral deposits is a factor that affects the price of metals. 15. Differentiate "Hard Goods" from "Soft Goods”. Give example
Direction: Write true if the statement/explanation is correct and if false, change the underlined word (s) with the correct one. 16. Fining agents such as arsenic or antimony are often added to cause the release of small bubbles during the melting. 17. Glass can be colored by concentrating it in metallic oxides, sulfides or selenides. 18. Sulfur-lime composition is used to make bottles, table wares, lamp, bulbs, and window & plate glass. 19. The difference of sucrose to the total content of soluble is known as the purity of sugar's raw material. 20. Glass is an amorphous substance made primarily of silica fused at moderate temperature with borates and phosphates. 21. Glass can be carved when heated. 22. At high temperature, glass is brittle and breaks with shell-like fractures on the broken face. 23. Lead-glass is used commercially for fireproofing and as sealant. 24. Crystal-glass or fine quality table glass is made from potassium-silicate formulas having an enhanced capacity to refract light suitable for lenses and prisms. 25. Borosilicate glass contains boron, silica and alkali having the property to resist chemical attack & high temperature & is widely employed for cooking utensils, laboratory glassware's & chemical process equipment. 26. After the glass has been formed, it is hardened in order to relieve stresses built up with the glass as it cools. 27. Soda, sand and water are the basic ingredients in glass making. 28. In an oven called lehr, the glass is reheated to a temperature high enough to relieve internal stresses and then cooling rapidly to avoid introducing new stresses. 29. Stresses can be added intentionally to impart strength to a glass article. 30. Minimizing the time between cutting and processing increases the amount of cane deterioration and encourages a higher sugar yield.