Sri Lanka Scientific Service Exam case studies
Sri Lanka Scientific Service Exam · Put your knowledge to work in context.
The Sri Lanka Scientific Service Examination is the recruitment examination through which graduates in science disciplines seek entry to the Scientific Service of the Sri Lankan public sector. It is intended for candidates with a first degree in a natural or applied science field who wish to build a technical, research or regulatory career within government service. The Sri Lanka Scientific Service Exam case studies are 5 cases and about 4,529 words.
1Two Analysts, Two Fluoride Maps: Which List Goes to the Health Office
A regional water-quality laboratory is mapping fluoride in 40 shallow groundwater wells in a dry-zone district, using one ion-selective electrode and one meter. Two analysts ran the same well list a week apart.
947 words, about 5 min2A 2.4% Standardization Drift and a Two-Tonne Rejection
A government analytical laboratory assays citric acid monohydrate (declared 99.5–100.5%; reject if below 99.0%) by titration with approximately 0.1 M sodium hydroxide using phenolphthalein. The NaOH stock has stood for five weeks in a high-density polyethylene carboy fitted with a soda-lime guard tube; when fresh it standardized against potassium hydrogen phthalate (KHP) at a factor of 1.000.
878 words, about 4 min3Pseudoreplication in a Three-District Biochar Trial
A researcher evaluates a biochar soil amendment on paddy yield in three districts. In each district she selects one farmer field; within that field she marks six 5 m × 5 m plots, applies biochar to three chosen at random and nothing to three, and harvests a 1 m² quadrat from the centre of each plot.
905 words, about 5 min4Arsenic in a Resettlement Scheme: Disclosure Under a Funder's Consent Clause
You are the senior chemist in a state water laboratory. A survey of tube wells in a resettlement scheme returns arsenic of 0.061 and 0.058 mg/L in two wells serving roughly 300 families; a third well reads 0.004 mg/L.
950 words, about 5 min5A 78% Germination Result, a Fusarium Isolate and a Closing Sowing Season
A national seed-testing laboratory receives a 25 t consignment of certified tomato seed with a declared minimum germination of 85%. Working to ISTA rules, the analyst draws a composite sample, then four replicates of 100 seeds, and records 78, 80, 76 and 78 normal seedlings at 14 days - 312/400, or 78.0%.
849 words, about 4 min