Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams — Dec. 2017 — 98-Ind-B5 Ergonomics. Three-hour, open-book exam (all notes, books and any non-communicating calculator permitted); the paper's own instructions state "a total of five (5) questions" while the printed marking scheme and all eight pages contain exactly four (Part A, Questions 1–2, mandatory; Part B, Questions 3–4, choose one) — a minor editorial inconsistency in the source, not a dropped question. The paper requires 4 of its own marked total; all four are solved below for completeness.
Reference texts: Sanders & McCormick, Human Factors in Engineering and Design (7th ed.) — error taxonomy, task analysis, mental workload measurement, macroergonomic assessment process; Waters, Putz-Anderson & Garg, NIOSH Applications Manual for the Revised NIOSH Lifting Equation (1994) — the RWL/LI formula and multiplier tables reproduced on the exam's own pages 7–8; NIOSH, Elements of Ergonomics Programs (1997) and CSA Z1004 (Canada) — workplace musculoskeletal-disorder (MSD) prevention programs; CSA Z1002 — hazard identification, elimination and risk assessment; ISO 11228 series — manual handling limits.
