Mechanical Engineering
GATE ME Machining and Machine Tool Operations PYQs
Build your understanding with focused practice from past exam papers.
Questions 41–50 of 63. Imported answers require independent review unless marked reviewed.
Question 52
Open questionMENAT2 marksNeeds review
In ASA system, the side cutting and end cutting edge angles of a sharp turning tool are 45° and 10°, respectively. The feed during cylindrical turning is 0.1 mm/rev. The center line average surface roughness (in μm, round off to one decimal place) of the generated surface is____
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Open questionMENAT2 marksNeeds review
Taylor’s tool life equation is given by
, where
is in m/min and
is in min. In a turning operation, two tools X and Y are used. For tool X,
= 0.3 and
= 60 and for tool Y,
= 0.6 and
= 90. Both the tools will have the same tool life for the cutting speed (in m/min, round off to one decimal place) of____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 53
Open questionMENAT2 marksNeeds review
A through hole is drilled in an aluminum alloy plate of 15 mm thickness with a drill bit of diameter 10 mm, at a feed of 0.25 mm/rev and a spindle speed of 1200 rpm. If the specific energy required for cutting this material is 0.7 N·m/mm³, the power required for drilling is _____ W (round off to two decimal places).
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Open questionMENAT2 marksNeeds review
In an orthogonal machining with a single point cutting tool of rake angle 10°, the uncut chip thickness and the chip thickness are 0.125 mm and 0.22 mm, respectively. Using Merchant’s first solution for the condition of minimum cutting force, the coefficient of friction at the chip-tool interface is _____ (round off to two decimal places).
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Open questionMEMCQ1 markNeeds review
Using the Taylor’s tool life equation with exponent n = 0.5, if the cutting speed is reduced by 50%, the ratio of new tool life to original tool life is
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A grind ratio of 200 implies that the
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Open questionMEMCQ1 markNeeds review
Interpolator in a CNC machine
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Open questionMEMCQ1 markNeeds review
Feed rate in slab milling operation is equal to
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Open questionMEMCQ1 markNeeds review
Metal removal in electric discharge machining takes place through
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Open questionMEMCQ1 markNeeds review
The preferred option for holding an odd-shaped workpiece in a centre lathe is
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