REHS EXAM QUESTIONS AND ANSWERS STUDY GUIDE WITH COMPLETE SOLUTION!!

REHS EXAM QUESTIONS AND ANSWERS STUDY GUIDE
WITH COMPLETE SOLUTION!!
1. A factor or agent which increases the risk of cancer is known as a
Answers carcinogen


2. The four major causes of death among all age groups of Americans include all of
the following




Answers homicide
3. In recent years, the largest number of rabies cases were associated with


Answers skunks
4. Asbestosis is caused by fine silicate fibers retained in the


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


Answers a communicable disease
6. Rocky mountain spotted fever is spread by


Answers ticks
7. Mycotoxins are poisonous chemicals produced by

,Answers fungi
8. The study of the occurrence, frequency, and distribution of disease is


Answers epidemiology
9. Which of the following organisms are most resistant to unfavorable
environmental conditions and indicate
past or possibly intermittent pollution?


Answers clostridium sporulates
10. Engineering controls are


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?


Answers boiling the water
12. Which of the following chemicals is most widely used to destroy
microorganisms?


Answers chlorine
13. Which of the following is not a practical method for removal of cadmium?


Answers reverse osmosis
14. Which of the following is not a commonly accepted method of device to
prevent backsiphonage?

,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?


Answers ammonia
16. One of the most common reasons for the contamination of wells drilled
through rock, clay, or hardpan is


Answers failure to seal well casings properly
17. In emergencies, small quantities of water can be disinfected by boiling or using


Answers tincture of iodine
18. Back flow of nonpotable materials into the potable water system may occur by


Answers a. back pressure b. backsiphonage
19. Which of the following statements should not be a consideration in locating a
groundwater supply?


Answers the distance that the water will need to travel
20. It is known that some common pathogenic organisms found in wastewater will
survive more than ____
of harsh temperature extremes


Answers 2 years
21. A storm sewer is used to

, Answers remove rain or other standing surface water
22. Stream pollution is sometimes apparent by


Answers a zone of degradation
23. If the septic tank will also have a garbage disposal unit feeding into it




Answers the size of the tank would be increased by 50 percent
24. How often should a septic tank for a private home be serviced?




Answers every 3 to 5 years
25. Plants absorb certain constituents of wastewater, using wastewater for
irrigation of consumable plant products
may present a health hazard to humans if the water contains




Answers cadmium
26. A measure of the relativity constant rate at which clear water, maintained at a
relatively constant depth, will
seep out of a standard size test hole that has been previously saturated is the


Answers soil percolation test
27. The ability of a soil to absorb and allow water and air to pass through is related
to all of the following except