GCE A/L Science for Technology case studies
GCE A/L Science for Technology · Put your knowledge to work in context.
Science for Technology is an Advanced Level subject in Sri Lanka's GCE A/L Technology stream, taken alongside Engineering Technology and Bio-systems Technology by students aiming at engineering, technology, and applied-science degree programmes and higher national diploma courses. It is designed as a bridging subject: it assumes Ordinary Level science and mathematics, then builds the physics, chemistry, biology, and instrumentation background that technology-stream students need before university coursework. The GCE A/L Science for Technology case studies are 5 cases and about 2,408 words.
1Micrometer Decision on a Copper Wire Coil
A technician must decide whether to accept a 200 m coil of copper wire specified as 0.80 mm diameter with a tolerance of ±0.02 mm. The micrometer has a zero error: when the jaws are closed it reads −0.03 mm.
467 words, about 2 min2Ladder Safety on a Slippery Workshop Floor
A maintenance worker must climb a uniform 4.0 m ladder of mass 14 kg to reach a ceiling light. The ladder leans against a smooth vertical wall at 68° to the horizontal.
448 words, about 2 min3Testing a Solar Water Heater Efficiency Claim
A household solar water heater has a flat-plate collector area of 3.0 m². On a clear day the average solar irradiance on the collector plane is 700 W/m².
439 words, about 2 min4Cable Choice for a Remote 12 V Pump
A farmer wants to run a 12 V, 120 W submersible pump from a battery shed to a water tank 35 m away. The cable route needs two copper conductors, so the total conductor length is 70 m.
420 words, about 2 min5Hydroponic Lettuce Tank: pH, EC and a Dilution Decision
A small hydroponic lettuce system holds 500 L of nutrient solution in a tank. The target electrical conductivity (EC) is 1.8 mS/cm and the target pH is 5.8–6.2.
634 words, about 3 min