During rail production, a hot steel slab is rolled with a 1000 mm width and thickness reduced from 40 mm to 30

Question

During rail production, a hot steel slab is rolled with a 1000 mm width and thickness reduced from 40 mm to 30 mm. Roll diameter is 700 mm, and average flow stress is 200 MPa. Which change would most effectively decrease the rolling load for the same reduction?

Examoogle · Accepted Answer

Option B: Using smaller diameter rolls for the operation

Explanation & Concepts:
Practice and solve "During rail production, a hot steel slab is rolled with a 1000 mm width and thickness reduced from 4..." for Part 5 Domain Knowledge - CIL MT Mechanical 2026. The correct answer is Option B: Using smaller diameter rolls for the operation. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.

Examoogle · Answer

Option A: Increasing the strip width to 1200 mm

Examoogle · Answer

Option C: Increasing the roll diameter used in rolling

Examoogle · Answer

Option D: Increasing the thickness reduction to 15 mm

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