HAZWOPER 8hr Refresher Test - Questions and Answers

HAZWOPER 8hr Refresher Test - Questions and Answers An oxygen-enriched atmosphere is defined as one containing more than what percentage of oxygen? A 19.5% B 21% C 23.5% D 10% Fiber concentrations are usually measured in: A ppm B mg/m3 C psi D f/cc The exposure level to which workers should never be exposed, even for a short time, is known as the: A STEL B TWA C Ceiling D TLV You are exposed to acetone at a concentration of 80 ppm for 6 hours and 20 ppm for 2 hours. What is the TWA? A 8 ppm B 20 ppm C 100 ppm D 65 ppm The minimum concentration of a substance in the air that is required for ignition is called the: A Lower Explosive Limit (LEL) B Upper Explosive Limit (UEL) C Explosive range D Time-Weighted Average (TWA) Placing a monitoring device in an area where people may work is an example of: A Personal monitoring B Area monitoring C Real-time monitoring D Sample analysis In what order should monitoring be conducted? A Explosives, oxygen, toxic substances B Toxic substances, explosives, oxygen C Explosives, toxic substances, oxygen D Oxygen, explosives, toxic substances At which of the following is medical surveillance required? A Cleanup operations involving hazardous substances B Uncontrolled hazardous waste sites C State and national priority sites and sites recommended for national listing D Initial investigations at government-identified sites E All of the above F None of the above HAZWOPER requires medical surveillance for which employees: A Employees who are or may be exposed to hazardous substances or health hazards at or above the established permissible exposure limit B Employees who wear a respirator for 30 days or more a year C Employees who develop signs or symptoms due to possible overexposure involving hazardous substances during a hazardous waste operation D Members of the HAZMAT team E All of the above How frequently must medical examinations be given to covered employees? A At least once every 24 months B At least once every 12 months C At least once every 6 months D At least every other month All medical evaluations must be made confidential and you must be given the opportunity to discuss the questionnaire and examination result with the physician. A True B False Employees are not permitted to view the content of their medical examinations. A True B False Employees are required by law to keep a record of their own medical examinations. A True B False Engineering controls should be used to control atmospheric hazards as much as possible. If those controls don't eliminate harmful substances from the air, respirators are required. A True B False Which of the following is NOT a requirement of the written respiratory protection program? A Engineering controls used B Respirator selection procedures C Respirator use and maintenance procedures D Respiratory hazards training What are the two main types of respirators? A Supplied-air and self-contained B Air-purifying and atmosphere-supplying C Air-purifying and self-contained D Powered and unpowered Which of the following is NOT true of a supplied-air respirator?