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Casting Practice Test: Mold and Mold Making
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Avg score: 0% Most missed: “In bedded-in method, what shape does the upper surface of the casting have?”
Mold and Mold Making topics include: Molds types, molding processes, ramming mold boxes methods, green sand molding methods, moulds venting, mold metal reaction and hand molding equipment. Here are some basics of mold making: Mold making: The process of forming and blanking tools, as well as shearing and die-cutting dies. A mold typically has two parts: a core die and a cavity die. A steel plate is placed between the upper and lower dies, and the material is molded under a press's action. Moulding: The process of making a mold. It involves preparing the molding mixtures and then making the... Show more
Casting Practice Test: Mold and Mold Making
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25 Questions

1. RPM is only used for castings of which of the following material?
2. In which of the following molding process strength at top of the mold is less?
3. Which of the following is not an application of Open sand molding method?
4. In squeeze ramming, hardness achieved is inversely proportional to the pressure applied on the squeeze plate.
5. Porous sintered materials can be inserted into the mould cavity to act as a vent.
6. Friability and crumbling are the properties which help in removing the core material from the solidified casting.
7. How much is the floor sand in a typical dry sand molding mixture?
8. What is the disadvantage of hand molding?
9. In mould making process, clamping is basically done to prevent any loss of material from the moulding box.
10. Quick solidification of the casting can cause defects like shrinkages, cracks or blow holes.
11. Venting is a process which allows molten metal to compensate for its liquid and solidification shrinkage.
12. The problem with moulding equipment in jolt moulding can be avoided by implementing a squeeze method of ramming.
13. Which of the following statement is true?
14. Green sand mold contains high strength.
15. Which machine molding process will give uniform strength throughout the mold?
16. It is possible to provide any kind of internal features to the casting by the help of pattern.
17. In the injection moulding process, an overflow system is used for the venting process.
18. In light alloys, metal – mold reaction can be suppressed by adding Helium.
19. Improper venting during moulding process causes a diesel effect which further results in stress crack defects in the casting.
20. In the mould, the heat experienced by the core is much severe than that of experienced by the mould wall.
21. Increase in content of the binders in the core sand always increases the porosity of the core material.
22. Cores generally experience a single force called gravitational force in the mould.
23. Which of the following is the simplest sand molding?
24. In bedded-in method, what shape does the upper surface of the casting have?
25. In mould making process, moulding time is greatly affected by the shape and size of the casting components.