GATE ME 2020 Set 1 — Question 22

MCQ+1 / -0.33MediumAbrasive MachiningMachining & Machine ToolsManufacturing Processes

Manufacturing Processes → Machining & Machine Tools → Abrasive Machining

Last updated 5 September 2026

Question

The base of a brass bracket needs rough grinding. For this purpose, the most suitable grinding wheel grade specification is

Correct answer (A) C30Q12V Solution For grinding wheel selection: 1. Abrasive : Silicon Carbide (C) is used for low tensile strength materials like brass, bronze, and aluminum. Aluminum Oxide (A) is used for high tensile strength materials like steel. 2. Grain Size : Rough grinding requires a coarse grain size (low numbers like 30). Fine grinding uses higher numbers (e.g., 90). 3. Structure : Rough grinding often uses an open structure (higher numbers like 12) to allow for chip clearance. 4. Bond : Vitrified bond (V) is common for general-purpose grinding. Therefore, C30Q12V (Silicon Carbide, 30 grit, Medium-Hard grade, Open structure, Vitrified bond) is the most suitable for rough grinding a brass bracket. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (A) C30Q12V Solution For grinding wheel selection: 1. Abrasive : Silicon Carbide (C) is used for low tensile strength materials like brass, bronze, and aluminum. Aluminum Oxide (A) is used for high tensile strength materials like steel. 2. Grain Size : Rough grinding requires a coarse grain size (low numbers like 30). Fine grinding uses higher numbers (e.g., 90). 3. Structure : Rough grinding often uses an open structure (higher numbers like 12) to allow for chip clearance. 4. Bond : Vitrified bond (V) is common for general-purpose grinding. Therefore, C30Q12V (Silicon Carbide, 30 grit, Medium-Hard grade, Open structure, Vitrified bond) is the most suitable for rough grinding a brass bracket.

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