Question 1: Compare and contrast the different control methods that are commonly used for ionizing radiation.

Question 2: Compare and contrast three methods of noise control. Which control method would you recommend for controlling exposure to a fan motor producing an eight-hour TWA noise exposure to an operator at 92 dBA?

Question 3: Compare and contrast the primary exposure routes for hazardous materials. How does the route of exposure influence the type of control method that you would recommend?

Question 4: Discuss the differences between ionizing and non-ionizing radiation. Provide one example of an occupational exposure to ionizing radiation and one to non-ionizing radiation. How do the differences influence the control methods used for these two types of radiation?

Question 5: OSHA currently enforces an eight-hour, time-weighted average (TWA) PEL of 90 dBA, and uses a 5 dB exchange rate. NIOSH recommends an eight-hour TWA exposure limit of 85 dBA and a 3 dB exchange rate. The 85 dBA limit and 3 dB exchange rate is also used as a threshold limit value (TLV) by the American Conference of Governmental Industrial Hygienists (ACGIH) as well as many European countries. Discuss using a 5 dB exchange rate versus a 3 dB exchange rate in protecting workers' hearing. Make a case for the use of either the 90 dBA PEL and 5 dB exchange rate or the 85 dBA REL and a 3 dB exchange rate.

Reference: Mroszczyk, J. W. (Ed.). (2012). Safety engineering (4th ed.). Des Plaines, IL: American Society of Safety Engineers.