Mechanical Engineering
2021 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE ME 2021 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 49–51 of 65. Imported answers require review unless explicitly marked reviewed.
Question 39
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In a grinding operation of a metal, specific energy consumption is 15 J/mm³. If a grinding wheel with a diameter of 200 mm is rotating at 3000 rpm to obtain a material removal rate of 600 mm³/min, then the tangential force on the wheel is ______ N (round off to two decimal places).
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A 200 mm wide plate having a thickness of 20 mm is fed through a rolling mill with two rolls. The radius of each roll is 300 mm. The plate thickness is to be reduced to 18 mm in one pass using a roll speed of 50 rpm. The strength coefficient (
) of the work material flow curve is 300 MPa and the strain hardening exponent,
is 0.2. The coefficient of friction between the rolls and the plate is 0.1. If the friction is sufficient to permit the rolling operation then the roll force will be ______ kN (round off to the nearest integer).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 41
Open questionMENAT2 marksNeeds review
The XY table of a NC machine tool is to move from
to
; all coordinates are in mm. The pitch of the NC drive leadscrew is 1 mm. If the backlash between the leadscrew and the nut is 1.8°, then the total backlash of the table on moving from
to
is ______ mm (round off to two decimal places).Log in to check the answer
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