1. Which substance is not a known or suspected carcinogen? a. Diesel Particulate Matters (DPM) d. Cadmium b. Arsenic e. None of the above C. Silica 2. Which statement is not a factor affecting toxicity in humans? a. Fundamental substance toxicity d. Chemical component b. Concentration e. Individual susceptibility c. Duration of exposure 3. In the 2nd century AD, the Greek physician, Galen, recognized the hazardous exposures of copper miners to: a. Diesel particulate matter (DPM) d. Heavy metal b. Acid mists e. Dust c. Poisonous gas 4. The water purification functions of wetlands are dependent upon four principal components of the wetland: substrate, water, vegetation, and microbial populations. a. Substrate, oxidizers, vegetation, and microbes d. Chemical reaction, substrate, water and vegetation b. Oxidizers, water, vegetation, and microbes e. Substrate, water, vegetation, and microbes c. Water, chemical reaction, vegetation, and algae f. None of the above 5. Under the Occupational Health and Safety Act, which among the list is not a responsibility of an employer: a. Provide standard operating procedures b. Provide necessary training for workers/supervisors c. Provide safe equipment and protective devices d. Provide competent supervision e. Inform workers and supervisors about workplace hazards 6. Which hazard category does energy sources belong to? a. Chemical hazards d. Physical hazards b. Biological hazards e. Psychosocial hazards c. Work design/ergonomic hazards 7. Fine solid or liquid matter suspended in a gas or liquid is called: a. Gas d. Vapour b. Particulate e. Solvent C. Aerosol