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Casting Practice Test: Foundry Metals & Materials
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Foundry Metals & Materials topics include: Cast irons, copper and magnesium alloys, foundry fluxes and refractories, steel and stainless steel melting, degassing metals and materials, foundry metals and alloys and aluminium alloys. Foundry metals and materials include: Cast iron: A common, inexpensive metal used in foundry casting Shell molding: A method used to produce cores for traditional sand casting Furan resin sand casting: A self-hardening sand used to produce complex metal castings Casting alloys: A metal or alloy that is poured into molds to produce metal castings Foundry sand:... Show more
Casting Practice Test: Foundry Metals & Materials
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25 Questions

1. Which of the following compounds can be used as an inhibitor in moulding materials for avoiding chemical reaction with magnesium alloys?
2. In sand casting of magnesium alloys, what is the amount of silica sand used in an American mix?
3. In magnesium alloys, what is the maximum amount of allowed aluminum?
4. At zero level temperature of copper alloys, they become very hard and brittle in nature.
5. What amount of impurity is allowed for copper to be used in electric applications?
6. Which colour is obtained by copper alloys, when zinc is added to it?
7. Magnesium metal possesses better noise and vibration damping characteristics than aluminum.
8. Refractories are generally inorganic non-metallic materials which can resist very high temperature.
9. What should the temperature ideally be to remove the casting after making of magnesium alloys?
10. In general, titanium is denser than steel due to compactness in grain structure of titanium.
11. What is the amount of carbon present in high carbon steel?
12. Excess of nitrogen in molten casting can cause embrittlement of casting components.
13. Magnesium metal is very light material, but not lighter than aluminium metal.
14. In general, magnesium alloy components tends to have fine grain structure in it.
15. Refractory materials are basically used for strengthening the casting materials used in the casting process.
16. Refractoriness of a material should always be greater than its application temperatures.
17. Copper cannot be removed from steel scraps by the method of conventional refining.
18. Which of the following materials is required in a technique of decarburizing the molten steel?
19. Melting and casting of titanium are very difficult due to its high chemical reactivity with mould materials.
20. In the manufacturing of stainless steel, oxidation of carbon and chromium cannot be possible.
21. The effectiveness of vacuum treatment is reduced by the increase in surface area of the molten metal exposed to vacuum.
22. Which of the given metals is not counted among late additions in aluminium alloys?
23. Which among the following is a heavy metal?
24. Copper alloys generally have sparking nature due to its high ductility.
25. The presence of hydrogen in molten casting strengthens the casting components.