GATE Manufacturing Processes II: Machining – Previous Year Questions
19 GATE previous year questions on Machining (Manufacturing Processes II, Production and Industrial Engineering) with answers and explanations, from every paper.
- GATE 2021 PI Q19 – Doubling cutting speed reduces turning-tool life to one-eighth. Find exponent n in Taylor’s law VTn=C.
- GATE 2021 PI Q56 – Orthogonal machining of mild steel uses rake 15°, uncut chip thickness 0.9 mm and chip thickness 1.8 mm. Find shear angle in degrees to one decimal.
- GATE 2022 PI Q29 – Orthogonal machining uses a zero-rake single-point tool. Chip-compression ratio is 1.25. Find shear angle in degrees to one decimal.
- GATE 2022 PI Q52 – Turning a 20 mm steel bar with an HSS tool gives life 10 min at 400 rpm and 40 min at 200 rpm. Find tool life at 300 rpm, nearest integer minute.
- GATE 2022 PI Q53 – Two tools turn at feed 0.2 mm/rev. Tool 1 has zero nose radius, side cutting-edge angle 20° and end cutting-edge angle 10°. Tool 2 has nose radius 0.5…
- GATE 2023 PI Q16 – An alumina grinding wheel has ANSI designation 51 A 36 K 5 V 23. What does K indicate?
- GATE 2023 PI Q17 – The directrix and generatrix of a machining operation are shown. Which surface is produced?
- GATE 2023 PI Q56 – In orthogonal cutting with rake angle 0°, cutting force is twice thrust force. Find coefficient of friction to one decimal.
- GATE 2023 PI Q58 – Straight turning uses feed rate 100 mm/min, spindle speed 1600 rpm and ASA tool signature 8–8–5–5–7–25–0. Find geometric peak-to-valley surface…
- GATE 2024 PI Q55 – Turn a 160 mm diameter,190 mm long workpiece at cutting speed 80π m/min and feed 0.2 mm/rev. Approach and overrun are 5 mm each. Find machining time…
- GATE 2024 PI Q58 – Orthogonal turning uses cutting speed 2 m/s, feed 0.2 mm/rev and depth 2 mm. Specific cutting energy is 2 J/mm³. Ignore feed-force power. Find main…
- GATE 2025 PI Q22 – An 8 mm through-hole is needed in 30 mm mild-steel plate. Which process best combines high dimensional accuracy with short processing time?
- GATE 2025 PI Q30 – In orthogonal straight turning, feed is 0.1 mm/rev and cut depth is 0.5 mm. ASA side cutting-edge angle is 0°. Find chip width (one decimal mm).
- GATE 2025 PI Q39 – Match grinding terms P: loading; Q: glazing; R: dressing; S: truing, with definitions 1: regenerate sharpness; 2: chips fill spaces between grits; 3:…
- GATE 2025 PI Q50 – Drill a 10 mm through-hole in 30 mm mild-steel plate at 600 rpm and feed 0.3 mm/rev. Approach and breakthrough distances are 3 mm each. Find drilling…
- GATE 2025 PI Q52 – Orthogonal cutting uses rake angle 10°, cutting force 900 N and thrust force 275 N. Find rake-face friction coefficient (two decimals).
- GATE 2026 PI Q33 – The modified Taylor law is VTnfm=constant, where speed V is m/s, life T is minutes, feed f is mm/rev, n = 0.25 and m = 0.5. Two conditions have equal…
- GATE 2026 PI Q47 – The source prints the minimum-energy orthogonal-machining relation =C-/2+/2, with φ shear angle, α rake angle and β friction angle. Which ONE OR MORE…
- GATE 2026 PI Q51 – Which ONE OR MORE work materials are NOT commonly machined with diamond cutting tools?