22-Mec-A4 Design and Manufacture of Machine Elements
Worked solutions to 13 past sittings (2013–2019), 84 questions. Pick a sitting, or start from a topic below.
- December 2019
- December 2018
- May 2018
- December 2017
- May 2017
- December 2016
- May 2016
- May 2015
- December 2014
- May 2014
- December 2013
- May 2013
- Undated paper
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Mohr's circle (3 sittings): December 2014 Q4 · May 2014 Q6 · December 2013 Q6
- Stress element at A (3 sittings): December 2014 Q4 · May 2014 Q6 · December 2013 Q6
- Fatigue (2 sittings): December 2019 Q5 · Undated paper Q4
- Fine blanking (2 sittings): December 2019 Q2 · May 2014 Q2
- Grinding-wheel grade (2 sittings): May 2015 Q3 · May 2013 Q1
- Heating bands (2 sittings): May 2014 Q3 · December 2013 Q3
- Hydrostatic extrusion (2 sittings): December 2019 Q1 · May 2014 Q4
- Maximum-shear elements (2 sittings): May 2014 Q6 · December 2013 Q6
- Principal (2 sittings): May 2014 Q6 · December 2013 Q6
- Workpiece burn (2 sittings): May 2015 Q3 · May 2013 Q1
Questions by sitting
December 2019
- Question 1: Hydrostatic Extrusion
- Question 2: Fine Blanking
- Question 3: Fracture During Bending of a Blanked Lever
- Question 4: Crank Under Combined Bending and Torsion — Factor of Safety at A
- Question 5: Minimum Shaft Diameter — Static Yield and Fatigue
- Question 6: Fillet-Weld Size for a Lever Welded to a Tubular Boss
December 2018
- Question 1: Sand-Casting Mould Cross-Section — Identification
- Question 2: Stretch Forming of a Sheet-Metal Vee
- Question 3: Casting Defects in a Cast-Iron Tee Fitting
- Question 4: Pin-Joined Tongs — Least Coefficient of Friction
- Question 5: Welded Sheet-Steel Bracket — Allowable Load
- Question 6: Thermal Stress in a Magnesium Tube and Aluminium Rod Across a Gap
May 2018
- Question 1: Thermoforming a square box - wall thinning at edges and corners
- Question 2: Compression moulding, transfer moulding and melt fracture
- Question 3: Die swell of an extruded rectangular bar, and sharkskin
- Question 4: Maximum stress and factor of safety of a cantilevered box section
- Question 5: Long-shoe external drum brake - maximum pressure, torque and power
- Question 6: Fillet-weld size for the lever at A
December 2017
- Question 1: Sheet-Metal Bending, Springback and Deep-Drawing Radii
- Question 2: Weld Zones, Solidification Cracking and Hydrogen Cracking
- Question 3: Weld-Line Defect and Feature Mouldability in Injection Moulding
- Question 4: Free-Body Diagrams of a Bicycle Under Pedal Load
- Question 5: Boom and Tie-Rod — Tension Versus Compression
- Question 6: Fillet-Weld Group Under an Eccentric Load
May 2017
- Question 1: Casting defects in a no-bake sand-moulded cast-iron tee
- Question 2: Identifying rolled threads, and process selection for a finned profile
- Question 3: Extrusion die design and flat-rolling defects
- Question 4: Mounting reactions on a four-wheel-drive transmission
- Question 5: Minimum fillet-weld size for an eccentrically loaded bracket
- Question 6: Spring-applied external double-shoe drum brake
December 2016
May 2016
- Question 1: Cutting Fluids, Chatter and Turned Surface Finish
- Question 2: Casting — Freezing Range, As-Cast Skin and Hot Tearing
- Question 3: Sheet Forming — Pressing Failure, the Forming Limit Diagram, and Sheet Property Selection
- Question 4: Thermal Stress in a Magnesium Tube and Aluminium Rod Separated by a Gap
- Question 5: Continuous Shaft on Three Bearings — Reactions, Bending Moment Diagram, and a Settled Bearing
- Question 6: Bolt Cutter — Force on the Bolt, Pin Loads, and Lever Stresses
May 2015
- Question 1: Stretch Forming of a Sheet-Metal Panel
- Question 2: Failure Modes and Tooling Geometry in Deep Drawing
- Question 3: Grinding-Wheel Grade and Workpiece Burn
- Question 4: Safe Load on a Bolted Cantilever Bracket
- Question 5: Load Capacity of a Welded Sheet-Steel Bracket
- Question 6: External Pivoted-Shoe Brake
December 2014
- Question 1: Casting an undercut part — sand mould versus permanent mould
- Question 2: Recovery and recrystallization of a strain-hardened metal
- Question 3: Extended Taylor tool-life equation — speed, feed or depth of cut
- Question 4: Stress element at A and Mohr's circle
- Question 5: Three-bearing shaft — rigid, settled and elastic centre support
- Question 6: Pivoted long-shoe drum brake
May 2014
- Question 1: Intersecting ribs in a cast machine-tool base, and porosity in a cast connecting rod
- Question 2: Fine blanking
- Question 3: Heating bands and a crack in a welded low-carbon steel joint
- Question 4: Hydrostatic extrusion
- Question 5: Force on the most heavily loaded rivet in an eccentrically loaded group
- Question 6: Stress element at A, Mohr's circle, principal and maximum-shear elements
- Question 7: Reaction at the centre bearing of a shaft on three supports
- Question 8: Fillet-weld size for the lever–boss joint
December 2013
- Question 1: Rib intersections in a cast machine-tool base, and feeding a sand-cast connecting rod
- Question 2: Redesigning three joints for adhesive bonding
- Question 3: Heating bands, and a weld crack in low-carbon steel
- Question 4: "Snap-through" when blanking a hard steel plate
- Question 5: Force on the most heavily loaded rivet
- Question 6: Stress element at A, Mohr's circle, and the principal and maximum-shear elements
- Question 7: Reaction at the centre bearing of a three-bearing shaft
- Question 8: Double-block brake — the distance a for equal wear
May 2013
- Question 1: Grinding-wheel grade, workpiece burn and the "acts softer" argument
- Question 2: Fracture of a stretch-formed pressing and the forming-limit diagram
- Question 3: Fracture during bending of a blanked lever
- Question 4: Casting defects in a no-bake sand mould for a cast-iron tee
- Question 5: Factor of safety of a crank shaft by the maximum-shear-stress theory
- Question 6: Minimum shaft diameter by static yield and by fatigue
- Question 7: Safe load on an eccentrically loaded bolted bracket
- Question 8: Fillet-weld size for a lever welded to a tubular boss
Undated paper
- Question 1: Grinding wheel grade, workpiece burning, and acting hardness
- Question 2: Press-formed part failing in stretching — forming-limit diagnosis
- Question 3: Springback control on a precision bent lever
- Question 4: Hollow input shaft of a crane gear box — fatigue, slopes and key stresses
- Question 5: External symmetric pivoted-shoe brake
- Question 6: Stress element and Mohr circle for a cantilever I-beam