Question

Match the following:

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-III, C-IV, D-I
• C. A-III, B-I, C-II, D-IV
• D. A-I, B-IV, C-II, D-III

Hint:

Investment casting is also called lost-wax casting and gives very high accuracy.

Answer 1

The Correct Option is C

Concept: Casting processes are classified based on mould type, pattern type, and method of metal pouring. Each process has a unique principle:
• Centrifugal casting uses centrifugal force to form hollow cylindrical parts.
• Full mould casting uses foam pattern that vaporizes.
• Investment casting uses wax pattern (lost-wax process).
• Die casting uses high pressure forcing molten metal into metallic moulds.

Step 1: Analyze centrifugal casting.
Centrifugal casting produces hollow cylindrical parts like pipes without using a core. The molten metal is rotated at high speed, forcing it outward. \[ A \rightarrow III \]

Step 2: Analyze full mould casting.
In full mould casting, a foam pattern is used which evaporates when molten metal is poured. \[ B \rightarrow I \]

Step 3: Analyze investment casting.
Investment casting uses wax patterns coated with ceramic slurry, later melted out. \[ C \rightarrow II \]

Step 4: Analyze die casting.
Die casting uses metal moulds and high pressure injection of molten metal. \[ D \rightarrow IV \] Final Answer: \[ \boxed{A-III,\; B-I,\; C-II,\; D-IV} \]