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Which of the following products is mostly produced by precision investment casting?

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Which of the following products is mostly produced by precision investment casting?

(a) Aluminium billets

(b) Rail

(c) Connecting rod and crankshaft

(d) Jewellery and surgical instruments

The question was asked in a national level competition.

This interesting question is from Precision Investment Casting in portion Special Casting Techniques of Casting-Forming-Welding I

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Correct answer is (d) Jewellery and surgical instruments

To explain: As in investment casting, less mass and size of casting with high complexities can be produced easily. So the jewellery and surgical instruments are produced easily in the investment casting. Other products like vanes and blades for a gas turbine, shuttle eyes for weaving, wave guide for radars and impellers for turbo chargers can also be produced.

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