REHS Exam (2023\/ 2024 Update) 500+ Questions and Verified Answers| 100% Correct<\/p>\n\n\n\n
REHS Exam (2023\/ 2024 Update) 500+
Questions and Verified Answers| 100%
Correct
Q: Which of the following is correct regarding the Lead and Copper contaminants?
A. Lead and copper are common source water contaminants
B. The MCL for lead is 0.015 mg\/L
C.Lead sampling is done in the home on 1 liter first draw water samples that have been stagnant
at least 6 hours in the pipe
D. Lead and copper are treated by coagulation
Answer:
C.Lead sampling is done in the home on 1 liter first draw water samples that have been stagnant
at least 6 hours in the pipe
Q: Which statement is correct regarding Drinking Water supplies?
A. They are a significant contributor to cancer risks in the population due to disinfection byproducts
B. They should be disinfected to become sterile so that no bacteria are present in the water
C. They always have the potential risk of microbial contamination that must be managed and
prevented
Answer:
C. They always have the potential risk of microbial contamination that must be managed and
prevented
Q: Why are indicator organisms rather than individual pathogens usually used as standards for
water quality management?
A. Indicators are easier and less expensive to monitor water quality
B. It would be necessary to monitor for dozens of individual pathogens
C. It is generally not necessary to know which specific pathogens might be present in the source
water, but just that they are being controlled
D. All of the above
Answer:
D. All of the above<\/p>\n\n\n\n
Q: Bacteria with the ability to live under both aerobic and anaerobic conditions are called:
A. facultative bacteria
B. obligate bacteria
C. anoxic aerobic bacteria
D. non-facultative bacteria
Answer:
A. facultative bacteria
Q: The difference between the initial dissolved oxygen in a sample of water and the dissolved
oxygen in a duplicate sample after a stated period of time is referred to as:
A. Biochemical Oxygen Demand
B. Chemical Oxygen Demand
C. Total Suspended Solids
D. Total Nitrogen
Answer:
A. Biochemical Oxygen Demand
Q: Which of the following is not a disease\/infection associated with drinking contaminated
water?
A. Hep A
B. Hep D
C. Typhoid Fever
D. Dysentery
Answer:
B. Hep D
Q: Nitrogen, Phosphorous, and Ammonia are chemical compounds that are commonly found in
wastewater and are capable of contaminating groundwater supplies and aquatic environments.
Collectively, these compounds are often referred to as:
A. nutrients<\/p>\n\n\n\n
B. redoximorphs Q: The natural aging process of lakes and reservoirs is called:
C. refractory organics
D. supplements
Answer:
A. nutrients
Q: Which of the following measurements of water pollution is considered the best singlestrength measure of polluted water containing degradable wastes?
A. Fecal Coliforms
B. Total Nitrogen
C. TSS
D. BOD
Answer:
D. BOD
Q: Water quality classifications as assigned by the US EPA and the states are based on:
A. size of local wastewater treatment facilities
B. the percentage of fresh vs. salt water available in a particular watershed
C. the best overall usage of the water based on stream flow, quality, and desired use
D. none of the above
Answer:
C. the best overall usage of the water based on stream flow, quality, and desired use
Q: The _<\/em> prohibits the discharge of pollutants into US waters without a permit issued by EPA
or the states.
A. NPDES
B. NRCS
C. USGS
D. SWCS
Answer:
A. NPDES<\/p>\n\n\n\n
A. mesotrophication
B. autotrophication
C. oligotrophication
D. eutrophication
Answer:
D. eutrophication
Q: Nutrients associated with eutrophication include all of the following except:
A. organic carbon
B. nitrogen
C. phosphates
D. potassium
Answer:
D. potassium
Q: Aerobic bacteria require all of the following nutrients for their life process except?
A. phosphorous
B. nitrogen
C. Magnesium
D. carbon
Answer:
C. Magnesium
Q: Primary treatment of wastewater is primarily a _<\/em> process
A. chemical
B. physical
C. biological
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