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Consider the following statements pertaining to investment casting:
1. It uses a wax pattern.
2. Large number of castings can be produced.
3. Only small size castings can be produced
4. It uses pressure to feed the molten metal into the mould cavity.
1. It uses a wax pattern.
2. Large number of castings can be produced.
3. Only small size castings can be produced
4. It uses pressure to feed the molten metal into the mould cavity.
- a)1 and 3
- b)1 and 2
- c)2 and 4
- d)1, 2 and 4
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements pertaining to investment casting:1. ...
**Investment Casting:**
Investment casting, also known as lost wax casting, is a manufacturing process used to produce complex and intricate metal parts. It involves creating a wax pattern of the desired part, which is then coated with a ceramic shell. The wax is melted out, leaving a hollow cavity that is filled with molten metal. After solidification, the ceramic shell is broken away, and the final casting is obtained.
**Statement 1: It uses a wax pattern.**
This statement is correct. Investment casting begins with the creation of a wax pattern that is an exact replica of the desired part. The wax pattern is typically made using a metal die or by injecting wax into a mold. This pattern is then used to create the ceramic shell.
**Statement 2: Large number of castings can be produced.**
This statement is correct. Investment casting is a versatile process that can be used to produce a large number of castings. The process allows for high dimensional accuracy and intricate details, making it suitable for complex parts. Additionally, since the wax pattern can be replicated easily, multiple castings can be produced from a single pattern.
**Statement 3: Only small size castings can be produced.**
This statement is incorrect. Investment casting is suitable for producing castings of various sizes, ranging from small to large. The process allows for high precision and intricate details, making it ideal for both small and large parts. However, larger castings may require additional considerations such as gating and venting to ensure proper filling and solidification.
**Statement 4: It uses pressure to feed the molten metal into the mold cavity.**
This statement is incorrect. Investment casting does not rely on pressure to feed the molten metal into the mold cavity. Instead, the process relies on gravity to fill the cavity. Once the ceramic shell is created and the wax pattern is melted out, the molten metal is poured into the hollow cavity. The metal flows into the cavity due to gravity, ensuring a uniform and complete filling.
**Conclusion:**
Based on the explanations above, we can conclude that the correct statements pertaining to investment casting are:
- It uses a wax pattern.
- Only small size castings can be produced.
Therefore, the correct answer is option B: 1 and 3.
Investment casting, also known as lost wax casting, is a manufacturing process used to produce complex and intricate metal parts. It involves creating a wax pattern of the desired part, which is then coated with a ceramic shell. The wax is melted out, leaving a hollow cavity that is filled with molten metal. After solidification, the ceramic shell is broken away, and the final casting is obtained.
**Statement 1: It uses a wax pattern.**
This statement is correct. Investment casting begins with the creation of a wax pattern that is an exact replica of the desired part. The wax pattern is typically made using a metal die or by injecting wax into a mold. This pattern is then used to create the ceramic shell.
**Statement 2: Large number of castings can be produced.**
This statement is correct. Investment casting is a versatile process that can be used to produce a large number of castings. The process allows for high dimensional accuracy and intricate details, making it suitable for complex parts. Additionally, since the wax pattern can be replicated easily, multiple castings can be produced from a single pattern.
**Statement 3: Only small size castings can be produced.**
This statement is incorrect. Investment casting is suitable for producing castings of various sizes, ranging from small to large. The process allows for high precision and intricate details, making it ideal for both small and large parts. However, larger castings may require additional considerations such as gating and venting to ensure proper filling and solidification.
**Statement 4: It uses pressure to feed the molten metal into the mold cavity.**
This statement is incorrect. Investment casting does not rely on pressure to feed the molten metal into the mold cavity. Instead, the process relies on gravity to fill the cavity. Once the ceramic shell is created and the wax pattern is melted out, the molten metal is poured into the hollow cavity. The metal flows into the cavity due to gravity, ensuring a uniform and complete filling.
**Conclusion:**
Based on the explanations above, we can conclude that the correct statements pertaining to investment casting are:
- It uses a wax pattern.
- Only small size castings can be produced.
Therefore, the correct answer is option B: 1 and 3.
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Consider the following statements pertaining to investment casting:1. It uses a wax pattern.2. Large number of castings can be produced.3. Only small size castings can be produced4. It uses pressure to feed the molten metal into the mould cavity.a)1 and 3b)1 and 2c)2 and 4d)1, 2 and 4Correct answer is option 'B'. Can you explain this answer?
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