Mechanical Engineering
GATE ME Machining and Machine Tool Operations PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–30 of 63. Imported answers require independent review unless marked reviewed.
Question 7
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The machining process that involves ablation is
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The correct sequence of machining operations to be performed to finish a large diameter through hole is
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In modern CNC machine tools, the backlash has been eliminated by
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 38
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An orthogonal cutting operation is performed using a single point cutting tool with a rake angle of 12° on a lathe. During turning, the cutting force and the friction force are 100 N and 600 N, respectively. If the chip thickness and the uncut chip thickness during turning are 1.5 mm and 0.75 mm, respectively, then the shear force is ______ N (round off to two decimal places).
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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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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 39
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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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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 40
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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).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
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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
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 9
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The process, that uses a tapered horn to amplify and focus the mechanical energy for machining of glass, is
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The base of a brass bracket needs rough grinding. For this purpose, the most suitable grinding wheel grade specification is
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