1
REHS PRACTICE EXAM QUESTIONS and
Answers TOP RATED A+ Latest Versions
2025
Inhalation of which of the following may result in chronic airway
resistance?
a. carbon monoxide
b. carbon dioxide
c. nitrogen dioxide
d. sulfur dioxide - ✔✔✔ Correct Answer > sulfur dioxide
Regulations regarding automobile emission standards began with
automobiles manufactured in
a. 1958
b. 1963
c. 1968
d. 1973 - ✔✔✔ Correct Answer > 1968
, 2
The majority of sulfur dioxide originates from
a. automobile exhaust
b. coal and oil burning power plants
c. industrial smelters
d. volcanic eruptions - ✔✔✔ Correct Answer > coal and oil
burning power plants
The majority of nitrogen dioxide originates from
a. motor vehicles
b. volcanic eruptions
c. home waste incineration
d. burning of industrial wastes - ✔✔✔ Correct Answer >
motor vehicles
Shock loading refers to
a. huge influx of fish to a breeding ground
b. large scale reproductive failure of fish in an area
c. several month's accumulation of acid quickly melting into a spawning
area
d. the overabundance of frog tadpoles emerging in an area - ✔✔✔
Correct Answer > several month's accumulation of acid quickly
melting into a spawning area
, 3
Which one of the following metals is most fatal to fish when it becomes
dissolved in acid waters?
a. manganese
b. lead
c. aluminum
d. zinc - ✔✔✔ Correct Answer > aluminum
The major constituent of the atmosphere today is
a. carbon dioxide
b. nitrogen
c. oxygen
d. argon - ✔✔✔ Correct Answer > nitrogen
Typically an abundant supply of groundwater may be yielded from
a. sedimentary rock
b. molten rock
c. igneous rock
d. metamorphic rock - ✔✔✔ Correct Answer > sedimentary rock
, 4
Which bacterial group is indicative of fecal contamination or sewage
pollution
a. pseudomonas
b. coliform
c. salmonella
d. all of the above - ✔✔✔ Correct Answer > coliform
Which residual test for chlorine would be least desirable?
a. SNORT
b. methyl orange
c. OTA
d. DPD - ✔✔✔ Correct Answer > OTA
Which would not be used as a coagulant?
a. black alum
b. chlorinated copperas
c. ferric chloride
d. sodium hypochlorite - ✔✔✔ Correct Answer >
sodium hypochlorite
REHS PRACTICE EXAM QUESTIONS and
Answers TOP RATED A+ Latest Versions
2025
Inhalation of which of the following may result in chronic airway
resistance?
a. carbon monoxide
b. carbon dioxide
c. nitrogen dioxide
d. sulfur dioxide - ✔✔✔ Correct Answer > sulfur dioxide
Regulations regarding automobile emission standards began with
automobiles manufactured in
a. 1958
b. 1963
c. 1968
d. 1973 - ✔✔✔ Correct Answer > 1968
, 2
The majority of sulfur dioxide originates from
a. automobile exhaust
b. coal and oil burning power plants
c. industrial smelters
d. volcanic eruptions - ✔✔✔ Correct Answer > coal and oil
burning power plants
The majority of nitrogen dioxide originates from
a. motor vehicles
b. volcanic eruptions
c. home waste incineration
d. burning of industrial wastes - ✔✔✔ Correct Answer >
motor vehicles
Shock loading refers to
a. huge influx of fish to a breeding ground
b. large scale reproductive failure of fish in an area
c. several month's accumulation of acid quickly melting into a spawning
area
d. the overabundance of frog tadpoles emerging in an area - ✔✔✔
Correct Answer > several month's accumulation of acid quickly
melting into a spawning area
, 3
Which one of the following metals is most fatal to fish when it becomes
dissolved in acid waters?
a. manganese
b. lead
c. aluminum
d. zinc - ✔✔✔ Correct Answer > aluminum
The major constituent of the atmosphere today is
a. carbon dioxide
b. nitrogen
c. oxygen
d. argon - ✔✔✔ Correct Answer > nitrogen
Typically an abundant supply of groundwater may be yielded from
a. sedimentary rock
b. molten rock
c. igneous rock
d. metamorphic rock - ✔✔✔ Correct Answer > sedimentary rock
, 4
Which bacterial group is indicative of fecal contamination or sewage
pollution
a. pseudomonas
b. coliform
c. salmonella
d. all of the above - ✔✔✔ Correct Answer > coliform
Which residual test for chlorine would be least desirable?
a. SNORT
b. methyl orange
c. OTA
d. DPD - ✔✔✔ Correct Answer > OTA
Which would not be used as a coagulant?
a. black alum
b. chlorinated copperas
c. ferric chloride
d. sodium hypochlorite - ✔✔✔ Correct Answer >
sodium hypochlorite
