Question

Q11. Which of the following is not a fettling operation
O (A) Removal of cores from the casting
O (B) Heat treatment
O (C) Removal of fins
O (D) Removal of adhering sand and oxides from the surface of the casting​

Answer 1

Answer:

option B: heating treatment

Answer 2

Among the following, heat treatment is not a fettling operation. (Option B)

• Fettling is one of the steps in the casting process.
• It is the step after the heat treatment in the casting process, therefore heat treatment is not a fettling operation.
• The fettling operation involves the separation of the cast from its mold using vibrations.
• The vibrations will break down the mold without causing any damage to the cast.
• Then all the cores, fins, and adhered sand and oxides are removed from the cast surface.