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GATE 2020: Manufacturing Quiz 3 (App update required to attempt this test)
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Question 1
The maximum possible draft in cold rolling of sheet increases with the _________.
Question 2
The ductility of a material with work hardening
Question 3
A round billet made of brass is to be extruded (extrusion constant = 250 MPa) at 700 °C. The billet diameter is 100 mm and the diameter after the extrusion is 50 mm. The extrusion force
Question 4
A 4 mm thick sheet is rolled with 300 mm diameter rolls to reduce thickness without any change in its width. The friction coefficient at the work-roll interface is 0.1. The minimum possible thickness of the sheet that can be produced in a single pass is:
Question 5
A strip of 120 mm width and 8 mm thickness is rolled between two 300 mm-diameter rolls to get a strip of 120 mm width and 7.2 mm thickness. The speed of the strip at the exit is 30 m/min. There is no front or back tension. Assuming uniform roll pressure of 200 MPa in the roll bite and 100% mechanical efficiency, the minimum total power (in kW) required to drive the two roll is _______.
Question 6
The ultimate tensile strength of a material is 450 MPa and the maximum elongation corresponding to maximum load is 40%. Determine the true stress-true strain relation in the plastic deformation range if the material obeys power law of hardening.
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ESE & GATE MEGeneralMar 18ESE & GATE ME
