13. Describe the process steps in sand casting? Compare to diecasting, what are some major advantages and disadvantages of sandcasting? 14. A large steel sand casting shows the characteristicsigns of penetration defect – a surface consisting of a mixture ofsand and metal. (a) What steps can be taken to correct the defects?(b) What other possible defects might result from taking each ofthese steps? 15. Using an explicit sketch to illustrate anddescribe the process steps in investment casting. What are theadvantages and disadvantages of investment casting over sandcasting? 16. What are some the operations required in sand castingafter the casting is removed from the mould?
17. What are the most common metals used in die casting?
18. Which die-casting machines usually have a higher productionrate, hot-chamber or cold-chamber?
19. What is the difference between true centrifugal casting andsemicentrifugal casting?Ă‚Â Ă‚Â
