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a. 23. Heat stress is caused by heat generated by means of. Hot weather d. Furnaces, kilns or other heat sources b. Human body e. Working in the sun c. Human body and heat gained from the environment 24. Loss of control of vehicle is an example of what component of the Bow-Tie Analysis Model: a. Hazard d. Recovery measures b. Threat e. Top event c. Control measures 25. In the Bow Tie Analysis Model, vehicle in motion (on haul roads) is an example of: a. Hazard d. Recovery measures b. Threat e Top event c Control measures II. True or folse: 25 points (circle the right answer) 1. To mitigate heat stress in a hot or warm work environment, the primary objective is to control temperature and maintain a balance between heat gain and losses. True False 2. Conduction is function of the environment's humidity and the airflow/exchange next to the skin. True False 3. One of the amendments to Regulation 854 that came into force in 2016 is strengthening and improving requirements regarding high visibility safety apparel. True 4. Cold stress is also known as "thermal strain". True False 5. Dynamic force presents a greater risk of strain than static force. True False False I. tasadda coria....... 4. Cold stress is also known as "thermal strain". True False 5. Dynamic force presents a greater risk of strain than static force. True False 6. In underground climate, auto compression of air adds 4-6C/km to the wet bulb temperature. True False 7. An industrial machinery gives out 112 dBA of noise 1 m away from the source, which requires double hearing protection. You are a worker performing work for 8-hrs around the machinery and you are required to wear double hearing protection. An earplug which has an NRR of 29 dB and an earmuff with an NRR of 31 dB. The suggested der- rating percentage of the hearing protections are 60% and 55% of the NRR, respectively. Does the double hearing protection reduce the noise level below 85 dB? True False 8. Dilated eye is an effect of critical hypothermia. True False 9. Ergonomics is a condition where a part of musculoskeletal system is injured over time. True False 10. The Ontario Health & Safety (OH&S) Act came into force in 1979, and the GOAL is making Ontario's workplaces safe and healthy". True False 11. Risk assessments and management is on of the amendments to regulation 854 that came into effect in January 2016 False 12. The Joint Health and Safety Committee is a process within an organization where everyone has direct responsibility for health and safety, and as an essential part of a worker's job. True False 13. Regulation 854, one of the Regulations associated with the OH&S Act, is for underground mines. True False 14. Under Section 183.1 (3) of Regulation 854: The flow of air must be at least 0.06 m/sec per for each kW of power of the diesel-powered equipment operating in the workplace. True False 15. There is an increased effect on the body if the vibration is in the "resonant frequency range of the body. True False 16. In Regulation 854, air volume requirements states that the flow of air must reduce the TWA exposure of a worker to total carbon, multiplied by 1.3, to not more than 0.4 mg/m' of air. True True False
