11-CS-2 Engineering Communications · December 2018
Question 5 of 7: Personal Protective Equipment
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Notes on this paper
National Exams — December 2018 — 11-CS-2 Engineering in Society: Health and Safety. Closed book; approved calculator permitted. Any five of the seven questions constitute a complete paper; all questions are of equal value. Answers are written in point form but fully, as instructed. Complete answers to all seven questions follow.
Question 5: Personal Protective Equipment (20 marks: 6/7/7)
Use only after higher controls (last line of defence); match to the hazard (from a hazard assessment; certified/rated); proper fit (fit-test respirators); comfortable and compatible; create no new hazard; support with training, maintenance and enforcement.
(ii) Eye and Face Protection Devices
Safety glasses with side shields (impact); goggles (dust/splash/chemical); face shields (full-face splash/debris); welding helmets/goggles with shade filters; laser safety glasses.
(iii) Respiratory Protection
Air-purifying respirators — particulate facepieces (N95), half/full-face with filters/cartridges, PAPR.
Atmosphere-supplying respirators — supplied-air (airline), SCBA, for oxygen-deficient/IDLH atmospheres.
Selection depends on contaminant, concentration, oxygen level and protection factor; air-purifying types must never be used in oxygen-deficient/unknown atmospheres.
