1|Page
Cole's EHS NEHA EXAM AND STUDY GUIDE EXAM
LATEST 2025 COMPLETE EXAM| QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+|| NEWEST!!
What is the best system for a small community? - ANSWER - Rapid
sand
Nitrogen is transformed into what during conventional biological
processes? - ANSWER - Ammonia and biological sludge
A family complains of multiple bites and a rash. What is the least likely
organism to cause it? - ANSWER - Tick
There is a vacant lot that has been used for dumping of unwanted items.
What is the correct action that REHS should perform? - ANSWER -
Contact the owner and explain the public health dangers, including the
harboring of rodents. Discuss measures to get the site cleaned up, as well
as blocking the area/post no dumping signs
During an emergency event, there is a worry about a hanta virus
outbreak. What educational measures should be put into place to help
the public - ANSWER - How to prevent rodents
Define toxicity - ANSWER - Toxic wastes are harmful or fatal when
ingested or absorbed
pg. 1
,2|Page
Define Corrosivity - ANSWER - Corrosive wastes are acids or bases and
are capable of corroding metal containers ex: battery acid
Define reactivity - ANSWER - Reactive wastes are unstable under
normal conditions. They can cause explosions, undergo violent
reactions, generate toxic fumes, gas , or vapors when heated compressed
or mixed with water. Example: lithiumsulfur batteries
Define ignitability - ANSWER - Ignitable wastes can create fires under
certain conditions, are spontaneously combustible, or have a flash point
less than 60 degrees celcius. Ex: waste oils
What is due process? - ANSWER - fair treatment through the normal
judicial system, especially as a citizen's entitlement. Amend 5, 6
What is not a concern of silicosis? - ANSWER - Tiles containing
asbestos
What part of schools should be tested for radon? - ANSWER - First floor
classrooms
What is the biggest obstacle in communicating food inspection results? -
ANSWER - Loud/busy kitchen
What would be least likely to contain asbestos? - ANSWER - Ceramic
tiles
pg. 2
,3|Page
What type of soil is best for onsite wastewater systems? - ANSWER -
Red, brown, or yellow soil
How fast can chemical food poisoning symptoms occur? - ANSWER -
One hour
What is it called when you clean human skin? - ANSWER - Asepsis
What is the ph range of staph - ANSWER - 4.0-9.8
Chemical sanitizer does what? - ANSWER - Kills some but not all
bacteria. Usually reduces to a generally acceptable level for public
health standards
What are the three primary water pollutants? - ANSWER - Nutrients,
sediments, chemicals?
Which agency would you refer to for writing water policy? EPA,
AWWA, NGWA, UsGS - ANSWER - Ngwa (national ground water
association)
What is the correct order of inspections based on priority? - ANSWER -
Recalls, food inspection, failure of a residential septic system
Come across a gasoline spill on the highway, what are the appropriate
steps to take - ANSWER - Contain the spill
pg. 3
, 4|Page
Which is an example or a non-communicable disease? (Diabetes,
cholera, influenza, measles - ANSWER - Diabetes
Define nonfeasance - ANSWER - Not acting when you should. Ex: not
closing a restaurant when an imminent health hazard is observed
Define malfeasance - ANSWER - Wrongful conduct, doing something
unlawful and in an unapproved way
Define misfeasance - ANSWER - Doing a proper act in an improper
manner
Tattoo parlors must have what 3 qualities? - ANSWER - Sterile gloves,
handwashing, process for equipment disinfection
What are the 7 tips for a healthy home? Keep it... - ANSWER - Dry,
clean, safe, well-ventilated, pest free, contaminant free, well-maintained
Which distance is less critical? Well to drain field, drain field to water
table, or drain field to bedrock - ANSWER - Drain field to bedrock
What should be considered when installing a well? - ANSWER –
Drainfield
pg. 4
Cole's EHS NEHA EXAM AND STUDY GUIDE EXAM
LATEST 2025 COMPLETE EXAM| QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+|| NEWEST!!
What is the best system for a small community? - ANSWER - Rapid
sand
Nitrogen is transformed into what during conventional biological
processes? - ANSWER - Ammonia and biological sludge
A family complains of multiple bites and a rash. What is the least likely
organism to cause it? - ANSWER - Tick
There is a vacant lot that has been used for dumping of unwanted items.
What is the correct action that REHS should perform? - ANSWER -
Contact the owner and explain the public health dangers, including the
harboring of rodents. Discuss measures to get the site cleaned up, as well
as blocking the area/post no dumping signs
During an emergency event, there is a worry about a hanta virus
outbreak. What educational measures should be put into place to help
the public - ANSWER - How to prevent rodents
Define toxicity - ANSWER - Toxic wastes are harmful or fatal when
ingested or absorbed
pg. 1
,2|Page
Define Corrosivity - ANSWER - Corrosive wastes are acids or bases and
are capable of corroding metal containers ex: battery acid
Define reactivity - ANSWER - Reactive wastes are unstable under
normal conditions. They can cause explosions, undergo violent
reactions, generate toxic fumes, gas , or vapors when heated compressed
or mixed with water. Example: lithiumsulfur batteries
Define ignitability - ANSWER - Ignitable wastes can create fires under
certain conditions, are spontaneously combustible, or have a flash point
less than 60 degrees celcius. Ex: waste oils
What is due process? - ANSWER - fair treatment through the normal
judicial system, especially as a citizen's entitlement. Amend 5, 6
What is not a concern of silicosis? - ANSWER - Tiles containing
asbestos
What part of schools should be tested for radon? - ANSWER - First floor
classrooms
What is the biggest obstacle in communicating food inspection results? -
ANSWER - Loud/busy kitchen
What would be least likely to contain asbestos? - ANSWER - Ceramic
tiles
pg. 2
,3|Page
What type of soil is best for onsite wastewater systems? - ANSWER -
Red, brown, or yellow soil
How fast can chemical food poisoning symptoms occur? - ANSWER -
One hour
What is it called when you clean human skin? - ANSWER - Asepsis
What is the ph range of staph - ANSWER - 4.0-9.8
Chemical sanitizer does what? - ANSWER - Kills some but not all
bacteria. Usually reduces to a generally acceptable level for public
health standards
What are the three primary water pollutants? - ANSWER - Nutrients,
sediments, chemicals?
Which agency would you refer to for writing water policy? EPA,
AWWA, NGWA, UsGS - ANSWER - Ngwa (national ground water
association)
What is the correct order of inspections based on priority? - ANSWER -
Recalls, food inspection, failure of a residential septic system
Come across a gasoline spill on the highway, what are the appropriate
steps to take - ANSWER - Contain the spill
pg. 3
, 4|Page
Which is an example or a non-communicable disease? (Diabetes,
cholera, influenza, measles - ANSWER - Diabetes
Define nonfeasance - ANSWER - Not acting when you should. Ex: not
closing a restaurant when an imminent health hazard is observed
Define malfeasance - ANSWER - Wrongful conduct, doing something
unlawful and in an unapproved way
Define misfeasance - ANSWER - Doing a proper act in an improper
manner
Tattoo parlors must have what 3 qualities? - ANSWER - Sterile gloves,
handwashing, process for equipment disinfection
What are the 7 tips for a healthy home? Keep it... - ANSWER - Dry,
clean, safe, well-ventilated, pest free, contaminant free, well-maintained
Which distance is less critical? Well to drain field, drain field to water
table, or drain field to bedrock - ANSWER - Drain field to bedrock
What should be considered when installing a well? - ANSWER –
Drainfield
pg. 4
