REHS EXAM|COMPLETE STUDY GUIDE WITH HIGH YIELD QUESTIONS AND 100% RIGHT/AUTHENTIC ANSWERS|A GUARANTEED PASS|LATEST UPDATED VERSION

1. A factor or agent which increases the risk of cancer is known as a a. teratogen b. mutagen c. carcinogen d. fomite - CORRECT ANSWERS.️️carcinogen 2. The four major causes of death among all age groups of Americans include all of the following except. a. homicide b. accidents c. malignant neoplasms d. heart disease - CORRECT ANSWERS.️️homicide 3. In recent years, the largest number of rabies cases were associated with a. skunks b. bats c. dogs d. raccons. - CORRECT ANSWERS.️️skunks 4. Asbestosis is caused by fine silicate fibers retained in the a. kidneys b. lungs c. colon d. abdomen - CORRECT ANSWERS.️️lungs 5. An illness due to a specific infectious agent or its toxic product which is transmitted from a reservoir to a susceptible host either directly or indirectly is called a. an infectious disease b. a communicable disease c. a genetic disease d. a noncommunicable disease - CORRECT ANSWERS.️️a communicable disease 6. Rocky mountain spotted fever is spread by a. flies b. spiders c. cockroaches d. ticks - CORRECT ANSWERS.️️ticks 7. Mycotoxins are poisonous chemicals produced by a. bacteria b. vertebrates c. viruses d. fungi - CORRECT ANSWERS.️️fungi 8. The study of the occurrence, frequency, and distribution of disease is a. entomology b. biology c. endocrinology d. epidemiology - CORRECT ANSWERS.️️epidemiology 9. Which of the following organisms are most resistant to unfavorable environmental conditions and indicate past or possibly intermittent pollution? a. fecal streptococci b. escherichia coli c. aerobacter aerogenes d. clostridium sporulates - CORRECT ANSWERS.️️clostridium sporulates 10. Engineering controls are a. controls that isolate or remove hazards from the work place b. less effective than good training c. the last option that should be considered d. less effective than personal protection processes - CORRECT ANSWERS.️️controls that isolate or remove hazards from the workplace 11. Which of the following is not considered a satisfactory solution to the problem of chemical contamination in Well systems? a. abandoning the well b. boiling the water c. building a new, properly constructed, drilled well - CORRECT ANSWERS.️️boiling the water 12. Which of the following chemicals is most widely used to destroy microorganisms? a. chlorine b. copper sulfate c. chloramine d. hydrogen sulfate - CORRECT ANSWERS.️️chlorine 13. Which of the following is not a practical method for removal of cadmium? a. ion exchange b. lime softening c. reverse osmosis d. iron coagulation - CORRECT ANSWERS.️️reverse osmosis 14. Which of the following is not a commonly accepted method of device to prevent backsiphonage? a. vacuum breakers b. cross-connections c. air gap separation d. back pressure units - CORRECT ANSWERS.️️cross-connections 15. This substance is the first product of the decomposition of organic matter. Its presence in water usually Indicates "fresh pollution" of sanitary significance. What is it? a. ammonia b. sugar c. carbon dioxide d. hydrogen sulfide - CORRECT ANSWERS.️️ammonia 16. One of the most common reasons for the contamination of wells drilled through rock, clay, or hardpan is a. seepage of pollutants through soil b. failure to seal well casings properly c. porosity of the rock d. use of inferior quality well casings - CORRECT ANSWERS.️️failure to seal well casings properly 17. In emergencies, small quantities of water can be disinfected by boiling or using a. aluminum salts b. tincture of iodine c. salt tablets d. direct exposure to sunlight for 22 hours - CORRECT ANSWERS.️️tincture of iodine 18. Back flow of nonpotable materials into the potable water system may occur by a. back pressure b. backsiphonage c. vacuum in the volume d. a and b above - CORRECT ANSWERS.️️a and b above 19. Which of the following statements should not be a consideration in locating a groundwater supply? a. the probable travel of pollution through the ground b. the well construction practices and standards c. the sanitary seal provided at the point where the pump lines pass out of the casing d. the distance that the water will need to travel - CORRECT ANSWERS.️️the distance that the water will need to travel