GATE General Engineering: Theory of Machines and Design – Previous Year Questions
13 GATE previous year questions on Theory of Machines and Design (General Engineering, Production and Industrial Engineering) with answers and explanations, from every paper.
- GATE 2021 PI Q30 – An M30 bolt requires pretension F i = 350 kN. Torque coefficient K = 0.2. Find tightening torque in N·m (integer).
- GATE 2021 PI Q31 – A 150 mm wide polyamide flat belt transmits 15 kW. Driving-pulley pitch diameter is 150 mm and speed 200 rpm. Find tight-side minus slack-side tension…
- GATE 2022 PI Q26 – The shown slider–crank rotates at 60 rpm. Crank radius is 30 mm and connecting-rod length 120 mm. Find average piston speed over one crank revolution…
- GATE 2022 PI Q47 – A solid circular shaft transmits 10 kW at 1440 rpm. Material shear yield stress is 150 MPa and safety factor 2. Find static-strength diameter in mm to…
- GATE 2023 PI Q28 – A solid circular flywheel disk is 0.025 m thick, has density 7800 kg/m³ and central mass moment of inertia 4.36 kg·m². Find its radius in m to two…
- GATE 2023 PI Q62 – A key of width and height 6 mm fixes a gear to a shaft of diameter 20 mm. Power is 10 kW at 600 rpm; allowable key shear stress is 80 N/mm². Neglect…
- GATE 2023 PI Q64 – A spur-gear pair transmits 20 kW at pitch-line velocity 10 m/s. Driving-gear diameter is 0.5 m. Find tangential force between driver and driven gear…
- GATE 2024 PI Q34 – An offset slider–crank is shown, with crank l, connecting rod 3l and offset l. For l = 10 cm, find slider stroke (one decimal cm).
- GATE 2024 PI Q51 – A flat belt on a pulley of radius 20 cm transmits 6.283 kW at 600 rpm, with friction coefficient 0.3. Torque and tightening force F are shown. Find…
- GATE 2025 PI Q55 – A 200 mm link OA rotates counterclockwise at constant angular velocity 100 rad/s. At the shown position it makes 30° with +X. Find absolute X…
- GATE 2025 PI Q57 – A plate is attached to a channel with three identical carbon-steel bolts as shown. Permissible shear yield strength is 400 N/mm². The plate carries 12…
- GATE 2026 PI Q20 – A student connects a shaft to a rotating machine-element hub using a tapered sunk key that prevents relative axial motion. Which key is most likely…
- GATE 2026 PI Q56 – A custom 20-tooth full-depth spur pinion has pressure angle 20°, width b = 10m and transmitted torque 95 N·m. Safe bending stress is 180 MPa and form…