GATE ME 2021 Paper 2 — page 17

Questions 49–51 of 65. Imported answers require review unless explicitly marked reviewed.

A surface grinding operation has been performed on a Cast Iron plate having dimensions 300 mm (length) × 10 mm (width) × 50 mm (height). The grinding was performed using an alumina wheel having a wheel diameter of 150 mm and wheel width of 12 mm. The grinding velocity used is 40 m/s, table speed is 5 m/min, depth of cut per pass is 50 μm and the number of grinding passes is 20. The average tangential and average normal force for each pass is found to be 40 N and 60 N respectively. The value of the specific grinding energy under the aforesaid grinding conditions is ____________ J/mm³ (round off to one decimal place).

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In a pure orthogonal turning by a zero rake angle single point carbide cutting tool, the shear force has been computed to be 400 N. The cutting velocity,

= 100 m/min, depth of cut,

= 2.0 mm, feed,

= 0.1 mm/revolution and chip velocity,

= 20 m/min, the shear strength,

of the material will be ____________ MPa (round off to two decimal places).

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The thickness, width and length of a metal slab are 50 mm, 250 mm and 3600 mm, respectively. A rolling operation on this slab reduces the thickness by 10% and increases the width by 3%. The length of the rolled slab is ____________ mm (round off to one decimal place).

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2021 · Paper 2

Question 39

Question 40

Question 41