Catalonia PAU Technology and Engineering II case studies
Catalonia PAU Technology and Engineering II · Put your knowledge to work in context.
Tecnologia i Enginyeria II is the second-year technology subject of the Catalan batxillerat, and its PAU examination is the university-access test taken by students who want engineering, architecture or science degrees to count this subject in their admission mark. It is also sat by candidates improving their score in later calls. The Catalonia PAU Technology and Engineering II case studies are 5 cases and about 3,635 words.
1Coastal Wind-Turbine Bracket: Lightness, Stiffness and Galvanic Risk
A portable 3 kW wind-turbine demonstrator uses a cantilever bracket to hold a 6.5 kg generator at 120 mm from a mast clamp. The bracket must carry a design point load of 250 N at its free end, with a maximum deflection of 1.5 mm and a safety factor of at least 2 on yield.
738 words, about 4 min2Conveyor Speed Increase: Sprocket Change or Motor Overload?
An existing pallet conveyor is driven by a 1.5 kW four-pole motor at 1450 rpm through a worm gearbox with ratio 30:1, a 15-tooth driving sprocket, a 45-tooth driven sprocket and a chain with 19.05 mm pitch. The driven sprocket is mounted on a 160 mm diameter head drum.
751 words, about 4 min3Circular Saw Breaker Trips: Cable Drop or Breaker Curve?
A 2.2 kW single-phase 230 V motor drives a circular saw in a small workshop. Its nameplate gives cos φ = 0.82 and efficiency η = 0.85.
702 words, about 4 min4Tank Level Loop: Real Oscillation or Sensor Artefact?
A 3 m² water tank supplies a process at a nearly constant 10 m³/h. A centrifugal pump, driven by a variable-frequency drive, can deliver 12 m³/h at 100% speed.
699 words, about 3 min5Pneumatic Clamp: Force, Air Consumption and Slow Retract
A pick-and-place station uses a double-acting pneumatic cylinder to clamp a 40 kg plate. The cylinder has a 63 mm bore, a 16 mm rod and a 150 mm stroke, and is supplied at 6 bar.
745 words, about 4 min