Question

Shown below are two parts of a mould. Mould is closed and material is poured into the cavity. What would be the resultant moulded part?

• A. A
• B. B
• C. C
• D. D

Hint:

In moulding questions, pay close attention to small, unique details like notches, holes, or fillets. These "fingerprint" features are often the key to distinguishing the correct answer from similar-looking options.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
This question tests the ability to visualize the result of a casting or moulding process. The final object's shape is defined by the empty space (the cavity) created when the two halves of the mould are closed.

Step 2: Key Formula or Approach:
1. Mentally assemble the two mould parts (the brown "core" and the blue "cavity"). 2. Identify the shape of the void between them. 3. The outer surfaces of the final part will be formed by the inner surfaces of the blue mould half. 4. The inner surfaces (holes, indentations) of the final part will be formed by the outer surfaces of the brown mould half. 5. Compare this derived shape with the given options.

Step 3: Detailed Explanation:
Let's trace the features from the mould to the final part:

The overall outer shape of the final part is determined by the inner cavity of the blue piece. This cavity has the outline of a block letter 'P'.
The hollow section inside the 'P' is formed by the brown core piece. Therefore, the shape of the brown piece must exactly match the shape of the hole in the final object.
Let's look closely at the brown core. It has a distinctive shape, particularly a notch or step on the top surface of the part that forms the inside of the P's loop.
Now, we look for this specific feature in the options.
Option (A) and Option (B) show a simple, smooth interior for the loop of the 'P'. They do not have the notch.
Option (D) is not a closed loop, which contradicts the mould shape.
Option (C) shows a 'P' shape where the inside of the loop perfectly matches the shape of the brown core, including the characteristic notch at the top. The outer shape also corresponds to the blue mould half.

Step 4: Final Answer:
By carefully matching the features of the mould's core and cavity to the options, we find that option (C) is the only one that would be produced by this mould.