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CHST Exam Questions and Complete Solutions
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When must a handrail be added to stairwell? - ANSWER When it is 30 inches or one having four or more risers. What are four concerns a CHST must address regarding unsafe use of ladders and stairwells? - ANSWER Slippery conditions, handrails on specific types, not used for storage and examined for weak structure. Specifications state that scaffolding must be of sufficent strength to hold more than how many times its specified weight? - ANSWER 4 times. How often should ropes and rigging in suspension scaffolding be inspected for damage? - ANSWER At the beginning and during each shift. How far from electrical power lines must a scaffold be? - ANSWER 10 feet What are three things scaffolds must have? - ANSWER Toe boards, guardrails and mid rails. How many catagories does an MSDS have? - ANSWER 16 What is the cheif concern in choosing the appropriate respirator? - ANSWER Material hazards presented by the worksite. What type of respirator is not good for workers with asthma? - ANSWER Negative pressure. Workers medical conditions are factors in choosing respirators. What are the three main factors to consider when choosing respirators? - ANSWER 1. The physical configuration of the jobsite. 2. The workers medical conditions. 3. Worker comfort.
What does MFF stand for? - ANSWER Metal Fume Fever. What are the symptoms of MFF? - ANSWER Resemble classical flu symptoms. Welders who work with hat tend to have higher incidence of MFF? - ANSWER Zinc Oxides What can prevent MFF? - ANSWER Welders to wear respirators and local or exhaust ventilation can effect nearby workers. What are the safe operating procedures pertaining to utlility and service lines when a building is being prepared for demolitions. - ANSWER 1. Conduct survey inspection. 2. Document specific hazards. 3. Evaluate utility functions servicing the building. What utlilties must be cute before demolition begins? - ANSWER Electric, water, gas, sewer and any other service. What should the survey report include for demolition? - ANSWER Whether there are dangers posed to workers or the environment like chemicals, gases, explosives, flammables or other hazardous materials in storage tanks. When can materials be dropped through floor openings? - ANSWER When the drop area is completely enclosed and barricaded. Barricades must be at least 42 inches high and no closer to the drop area than 6 feet. From which height must a chute be used when removing waste form upper levels of buildings?
doors and windows. This can be ineffective an requires constant mointoring. It can be effective if air contaiminants are not far able the PEL. What is local exhaust ventilation? - ANSWER More costly than natural or forces air-intake methods. Requires the installation of machinery to collect and filter contaminants from the air before it can move from the source of the contamination. When natural or forced air dilution methods are ineffective, such as in the removal of flammable vapors or dust, exhaust ventialtion must be used to collect hazardous material. What are the three main types of installation for employee emergency fire alarm or sprinkling systems? - ANSWER 1. Conventional Sprinkler Systems
What are two of the main componets that are part of the management commitment to worker safety required by the VPP program? - ANSWER 1. Hazard Prevention and Control