REHS/RS NEHA Study Guide - Revised August 2023 Questions With Complete Solutions

When gas pipe is leaking, what methods would be used by the technician to identify the exact point of leakage? correct answer: Using soap bubble solution What is the graphic tool used by meteorologists to give a succinct view of how wind speed and direction are typically distributed at a particular location correct answer: Wind Rose What is the lowest portion of Earth's atmosphere called: correct answer: troposphere (a height of about 3.7-6.2 miles (6-10 km) What three viruses cause the largest number of known cases of illness through contaminated food: correct answer: Hepatitis, Rotavirus, Norovirus Shellfish poisoning is caused by a group of toxins produced by: correct answer: planktonic algae (dinoflagellates, in most cases) What is the most widely accepted detection method for the saxitoxins (Paralytic Shellfish Poisoning) around the world: correct answer: mouse bioassay (not as useful in Diarrhetic Shellfish Poisoning or Neurotoxic Shellfish Poisoning) Pufferfish (also called "fugu" or "blowfish") are thought of as a delicacy - even though they contain this toxin: correct answer: tetrodotoxin (in some types of pufferfish, some of the organs like the liver and skin contain tetrodotoxin; in some pufferfish the toxin is in the meat also; and some have no toxin at all)