CSAT Vocational Inquiry case studies
CSAT Vocational Inquiry · Put your knowledge to work in context.
The vocational inquiry section of the CSAT (직업탐구 영역) is the subject area taken by candidates at vocational high schools who are applying to universities. It tests whether you understand the working principles, terminology and practical judgment of a trade, not just whether you memorized textbook definitions. The CSAT Vocational Inquiry case studies are 5 cases and about 4,066 words.
1Coir-Slab Fertigation: When Drain Fraction Collapses
A 0.3 ha greenhouse in Jinju grows 1,200 cherry tomato plants in coir slabs fed by drip fertigation. The target is feed solution EC 2.4 mS/cm, pH 5.8, and 25-30 % drain.
850 words, about 4 min2Nuisance RCD Tripping in a Laundry Circuit
A 12-unit apartment building has a 30 mA residual current device protecting the laundry-room socket circuit, with the corridor lighting on the same sub-board. Since the rainy season began, the RCD has tripped about twice a week, always in the early morning when several washing machines run.
754 words, about 4 min3Two-Stage Cooling Failure in a Hospital Kitchen
A hospital central kitchen produces 400 portions of beef and vegetable stew daily. The HACCP plan requires two-stage cooling: from 57 °C to 21 °C within 2 hours, then to 5 °C or below within a further 4 hours, with the core temperature of every batch logged.
852 words, about 4 min4Cold-Weather Slab and Upstand Pour
On a five-storey car park project, the ground-floor slab-on-grade was placed on 12 November: 24 MPa design strength, 180 mm thick, 620 m², ready-mix without accelerator, delivered at 12 °C and finished at 15:40. The forecast gives 3 °C at 18:00 falling to -4 °C overnight with 20 km/h wind.
785 words, about 4 min5Sump Entry Under an Invalid Permit
At a wastewater treatment plant, a contractor must remove grit and rags from a rectangular sump 4.0 m long, 2.5 m wide and 4.5 m deep, entered through a 600 mm square opening at ground level. The sump has been isolated and drained, but sludge 200 mm deep remains.
825 words, about 4 min