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Match the mold elements in the casting process with the most suitable function. Mold element: P. Blind riser Q. Chill R. Skim bob S. Core T. Insulating sleeve U. Inoculant Function: I. Casting with internal cavity II. Molten metal reservoir III. Nucleating agent IV. Assisting in faster heat removal from melt V. Removal of impurities VI. Increasing the solidification time

1. P-II, Q-IV, R-V, S-I, T-VI, U-III
2. P-II, Q-V, R-VI, S-I, T-III, U-IV
3. P-V, Q-I, R-VI, S-III, T-II, U-IV
4. P-II, Q-IV, R-I, S-V, T-VI, U-III

Correct answer: P-II, Q-IV, R-V, S-I, T-VI, U-III

Solution

A blind riser acts as a molten metal reservoir to feed shrinkage. A chill increases heat extraction, a skim bob removes impurities, a core creates internal cavities, an insulating sleeve increases solidification time, and an inoculant acts as a nucleating agent.

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