12. Bromate and chlorinated chemicals are some of hazardous substances present in working environments that may affect the: a. Nerve function disorder d. Oxygen deprivation to the brain b. Depression of system e. Organ damage C. Brain poisoning 13. The study of factors affecting the health and illness of populations. Human testing d. Mutagenicity b. Animal testing e. Epidemiology c. Teratogenicity 14. Liquid droplets suspended in air. a. Vapours d. Particulates b. Mists and fogs Fumes Gases a. e C. 15. One of the most poisonous gases that has a 'rotten egg' odor. a. Ammonia d. Hydrogen sulphide b. Nitrogen dioxide e. Sulfur dioxide C. Methane a. C. 16. What factor does not affect toxicity of a harmful agent in humans? Medical condition d. Duration of exposure b. Individual susceptibility e. Individual susceptibility Fundamental substance toxicity f. None of the above 17. Gas that does not have physiological effect on person and is dangerous only if it displaces oxygen. a. Carbon dioxide d. Ammonia b. Carbon monoxide e. Nitrogen C. Methane f. Nitrogen dioxide a. 18. Hazards that cause both acute and chronic health effects. a. Silica e Trichloroethylene b. Asbestos f. Vibration c. Acid mists 8. a to e d. Carbon monoxide h.b to e 19. A common states of contaminant that is created by heating, evaporation or condensation. Mist d. Gas b. Fog e Particulate C. Vapour f. None of the above 20. Elements of an occupational health program. a. First aid e. Medical surveillance b. Workplace training f. Policies and programs c. Employee assistance program g. a, c, and e , e d. Incident investigation h. b, d and f