GATE ME 2020 Set 1 — Question 56
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.NAT+2 / -0HardRolling (Load & Torque)FormingManufacturing Processes
Manufacturing Processes → Forming → Rolling (Load & Torque)
Last updated
Question
The thickness of a steel plate with material strength coefficient of 210 MPa, has to be reduced from 20 mm to 15 mm in a single pass in a two-high rolling mill with a roll radius of 450 mm and rolling velocity of 28 m/min. If the plate has a width of 200 mm and its strain hardening exponent, is 0.25, the rolling force required for the operation is ________ kN (round off to 2 decimal places).Note:
Correct answer
1164 to 1168
Solution
To find the rolling force, we follow these steps:
Rounding to two decimal places, the rolling force is 1167.42 kN. The official GATE answer key allows a range of 1164 to 1168.
1.Calculate the True Strain ():
2.Calculate the Average Flow Stress ():
Using the given formula:3.Calculate the Projected Length of Contact ():
4.Calculate the Rolling Force ():
Where is the width (200 mm).Rounding to two decimal places, the rolling force is 1167.42 kN. The official GATE answer key allows a range of 1164 to 1168.
Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE ME question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on Forming
2026 Set 1 Q30In relation to metal casting defects, match the following | Defect | Description | | :--- | :--- |…2026 Set 1 Q32A work piece is to be firmly held in a fixture. It is to be machined by using a plain slab milling…2026 Set 1 Q59In a deep drawing operation of a rectangular sheet metal, stretching in length results in…2026 Set 1 Q63During orthogonal turning by using a single point cutting tool, feed rate is 0.24 mm/rev. The uncut…2026 Set 1 Q64A drill bit during its lifetime can produce 150 through holes in a plate at a drill-speed of 200…