GATE ME 2016 Set 1 — Question 61

MCQ+2 / -0.67MediumRiser & Gating DesignCastingManufacturing Processes

Manufacturing Processes → Casting → Riser & Gating Design

Last updated 5 September 2026

Question

A cylindrical job with diameter of 200 mm and height of 100 mm is to be cast using modulus method of riser design. Assume that the bottom surface of cylindrical riser does not contribute as cooling surface. If the diameter of the riser is equal to its height, then the height of the riser (in mm) is

M_c = \frac{V_c}{A_c} = \frac{\frac{\pi}{4} D_c^2 H_c}{2 \frac{\pi}{4} D_c^2 + \pi D_c H_c} = \frac{D_c H_c}{2 D_c + 4 H_c}

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M_c = \frac{V_c}{A_c} = \frac{\frac{\pi}{4} D_c^2 H_c}{2 \frac{\pi}{4} D_c^2 + \pi D_c H_c} = \frac{D_c H_c}{2 D_c + 4 H_c}

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