Question

Which of the following statement is true?

(a) The size of the casting can be adjustable

(b) The size of the casting is not limited

(c) The size of the casting obtained by shell moulding is limited

(d) None of the mentioned

This question was addressed to me in an interview for internship.

I would like to ask this question from Special Casting Techniques in chapter Special Casting Techniques of Casting-Forming-Welding I

Answer 1

The correct answer is:

(c) The size of the casting obtained by shell moulding is limited

Explanation:

• Shell moulding is a type of investment casting that uses a ceramic shell to form the mold. This process is typically used for small to medium-sized castings with intricate details. However, the size of castings produced by shell moulding is limited because of the limitations in handling large molds and maintaining the precision and quality of the mold.

• Option (a): The size of the casting is typically fixed by the capabilities of the mold and the casting process, so it's not usually adjustable.

• Option (b): The size of castings is always limited by the process, so it's not true that it is unlimited.

• Option (d): Since option (c) is correct, this statement is not applicable.

Thus, the correct statement is (c) The size of the casting obtained by shell moulding is limited.