REHS/RS NEHA Study Guide - Revised August 2023- 465 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) Compounds that cause neurological symptoms such as profuse sweating, coma, convulsions, hallucinations, excitement, depression, spastic colon correct answer: Neurotoxins Compounds that produce rapid, transient nausea, vomiting, abdominal cramping, and diarrhea: correct answer: gastrointestinal irritants mushrooms in this category generally are nontoxic and produce no symptoms, unless alcohol is consumed within 72 hours after eating them, in which case a short-lived, acute toxic syndrome is produced: correct answer: disulfiram‐like toxins This is is a human illness caused by consumption of some subtropical and tropical marine finfish correct answer: Ciguatera fish poisoning (caused by consumption of subtropical and tropical marine finfish that have accumulated ciguatoxins through their diets) Powdered infant formula is not sterile, and its nutrients provide good conditions for the growth of correct answer: Cronobacter (after reconstitution)