REHS Sample Exam Questions and Answers 2023 Solved 100% Correct

time, distance, sheilding - ANSWER-What are the three things that provide protection against radiation? The A-weighted scale is most commonly used. It considers frequency, intensity , and impact level. - ANSWER-What scale is used when measuring noise in a sheet metal shop? Photochemically. Naturally, as sunlight passes through oxygen molecules, and by high voltage electricity (lightening). O + UV light - ANSWER-how is ozone created? It neutralizes it. It destroys the free available chlorine present without effecting pH - ANSWER-What does sodium thiosulfate do to chlorine? 100 years. - ANSWER-how long does it take class A radioactive waste to degrade to a safe level? In stairwells with poor ventilation - ANSWER-Where do you sample for radon in schools? They are easily absorbed and have low penetrating ability. - ANSWER-What are the characeristsics of alpha particles? Sulfer dioxide, nitrogen oxide, carbon monoxide, lead, particulate matter - ANSWER-What are the criteria air pollutants? Electrostatic precipitater. Particles pass through an electrical field, are charged, then are attracted to a plate. the particles then fall into a hopper. - ANSWER-How is dust from a cement kiln cleaned? Compacted, six inches. Uncompacted, five feet. - ANSWER-how far can a fly penetrate the soil? Avoid ticks. Cover up and use repellant. Remove tick carefully and seek medical attention. The cause is a spirochete Borrelia burgendorfi. - ANSWER-How do you prevent Lyme disease? Temperatures associated with shipping, receiving, storage, preparation, cooking, cooling, holding (hot and cold) and reheating. - ANSWER-What are the critical control points in receiving and preparing chicken?