GATE MT 2016 Q.25 A rolling mill has a roll diameter of 200 mm. If coefficient of friction is 0.1, then the maximum possible reduction (in mm) during rolling of a 250 mm thick plate is ______.

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Asked: 3 years ago2020-04-09T04:00:45+05:30 2020-04-09T04:00:45+05:30In: Metal Working (Forming)

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Askmemetallurgy Official · Accepted Answer · 2020-07-20T19:01:14+05:30

Correct answer is 1 mm. As we know, Δhmax= μ2R R= D/2 = 200/2 =100 mm Given μ=0.1 On substitution, Δhmax= (0.1)2×100 = 1 mm

Correct answer is 1 mm.

As we know, Δh_max= μ²R

R= D/2 = 200/2 =100 mm

Given μ=0.1

On substitution, Δh_max= (0.1)²×100 = 1 mm