Engineering Questions with Answers - Multiple Choice Questions
Manufacturing Engineering – Expendable Mold Expendable Pattern Processes
1 - Question
Which of the following casting process uses a polystyrene pattern? a) investment casting b) ceramic-shell casting c) evaporative-pattern casting d) slush casting
Answer: c Explanation: The evaporative-pattern casting process uses a polystyrene pattern, which evaporates upon contact with molten metal to form a cavity for the casting. This process is also known as lost-foam casting and falls under the trade name full-mold process.