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Sprue design is made tapered instead of straight ___________(a) To easy flow of molten metal(b) To have smoothness in the metal flow(c) To maintain the pressure balance(d) To avoid the erosion of mould sand |
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Answer» The correct option is (c) To maintain the pressure balance The explanation: Pressure balance is maintained, to avoid the negative pressure (to ensure positive pressure anywhere in the liquid column), the sprue should be tapered. The ideal shape of the sprue is parabola but to reduce the manufacturing difficulty shape of the sprue is considered as tapered cylinder. |
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