NEHA RS/REHS EVALUATION EXAM 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔What is the minimum recommended space of Beach area per person? - ✔✔50 sq ft
✔✔Skin irritation can be caused by prolonged exposure to water with a pH of ? -
✔✔Below 7.4 or 7.0 (eye irritation is prolonged exposure to 7.4 and below as well)
✔✔The filter in a swimming pool should run for how long? - ✔✔Continuously
✔✔At what time interval should water in a spa, whirlpool or hot tub recirculate? -
✔✔Entire body of water should recirculate in 30 minutes (30 minute turnover rate)
✔✔In a recreational area with gender bathrooms, what is the ratio of toilets per person?
- ✔✔200 per person
✔✔A public park owner refuses to repair a sewage leak. What should the sanitarian do?
- ✔✔File an injunction/summary statement
✔✔If 100 people are attacked by a new disease of the total population of 70,000, the
attack rate per person is? - ✔✔Prevalence Rate (# of people with the disease/total #of
people in the population) x100
100/70,000X100=.14%
Incidence rate = (# of new cases of the disease/# of persons at risk) X 100---would be
the same %
✔✔Spa and hot tub maximum temperature is? - ✔✔104 degrees
✔✔A pool filtration system should filter the entire volume of water in the pool every? -
✔✔6-8 hours
✔✔Cyanuric acid additive is used in pools and spas to: - ✔✔Stabilizes the residual
chlorine level.
✔✔The addition of sodium bicarbonate is usually used to? - ✔✔Raise the alkalinity
(raise the pH).
✔✔What is a chemical that is commonly used to improve pool water clarity? - ✔✔Alum
(aluminum sulfate)
,✔✔the best control of swimmer's itch (which is caused by a protozoa) at a bathing
beach is to? - ✔✔Add copper sulfate
✔✔What is the normal operating free chlorine residual used in regular practice for
swimming pools? - ✔✔1-3mg/L
✔✔The ideal pH range for swimming pools is? - ✔✔7.2-7.6ppm
✔✔the fresh water line to a swimming pool must have what? - ✔✔The ability to fill the
pool through an approved air gap
✔✔Approved public swimming pools should have what? - ✔✔A pump that will re-
circulate the contents of the pool every 6-8 hours, a filter that is designed for the output
of the recirculation pump, a disinfection system capable of dosing an outdoor pool at
10mg/L (indoor pool 5mg/L) (CHOOSE ALL OF THE ABOVE.)
✔✔The recommended and most effective method of maintaining pool water quality is? -
✔✔Continuous recirculation, chlorination, and filtration.
✔✔HAZWOPER (Hazardous Waste Operations and Emergency Response)
requirement apply to? - ✔✔Voluntary clean up at uncontrolled hazardous waste sites.
✔✔What are the Levels of Emergency Warning (ER Planning and Response)? -
✔✔Level 1-ALERT, Level 2-EMERGENCY, Level 3-GENERAL EMERGENCY (Level 1
is an alert to everyone that a hazard may exist, Level 2 is a site specific/area specific
alert ER personnel only, and Level 3 is a general alert to all that ER does exist)
✔✔The senior emergency response official responding to an emergency is called? -
✔✔An Incident Commander
✔✔The US Dept. of Transportation (DOT) hazardous material regulations do what? -
✔✔identify the hazardous materials during the initial response phase of an accident.
✔✔What is the number ONE item, listed under emergency equipment and supplies? -
✔✔Water (2 gallons of water per person)
✔✔In case of disasters, the speed with which action may be implemented is dependent
upon what? - ✔✔Prior plans for emergencies
✔✔Emergency shelters should provide a minimum of how much space per person? -
✔✔30 square feet per person
, ✔✔What is the best way to protect a community drinking water supply/system from
terrorist activity? - ✔✔Routine surveillance
✔✔Which duty is most important for health personnel during a disaster? - ✔✔Medical
and dental services
✔✔Which are used as bioterrorist agents? - ✔✔Small pox and anthrax
✔✔Which one is not considered the responsibility of the incident commander during a
disaster incident? - ✔✔Finances
✔✔During a disaster, Health Personnel are? - ✔✔First responders
✔✔Which of the following is NOT a major source of sulfur dioxide? - ✔✔Electrical
substations
✔✔Which of the following is not a malodorous gas? - ✔✔Carbon Monoxide
✔✔What is a primary pollutant? - ✔✔One that is found in the atmosphere due to a
natural reaction, found in its natural form.
✔✔Particle size selective inlets are used to separate particulates above and below 2-3
microns in size on? - ✔✔High volume samplers
✔✔The Ringleman Smoke Chart method of evaluating particle pollution in the
atmosphere is being replaced by testing for what/or a determination of what? Also, the
new method for concentration measurements? - ✔✔Opacity-percent opacity
✔✔Which of the following are examples of short-range primary pollutants? - ✔✔Total
suspended solids and Sulfur dioxide.
✔✔The accumulation and/or increased concentration of a continuously emitted pollutant
is what? - ✔✔Inversely proportional to wind speed
✔✔For workers, a sound level above ____ dBA should be considered unsafe for daily
exposure over a period of months - ✔✔90 dBA
✔✔The most common type of noise measurement device used for initial surveys to
provide rapid evaluation and identification of potential problem areas is: - ✔✔The Sound
Level Meter
✔✔Obtain a stack sample at what air flow speed? - ✔✔The same speed of flow that
gases normally pass through the stack
QUESTIONS AND SOLUTIONS RATED A+
✔✔What is the minimum recommended space of Beach area per person? - ✔✔50 sq ft
✔✔Skin irritation can be caused by prolonged exposure to water with a pH of ? -
✔✔Below 7.4 or 7.0 (eye irritation is prolonged exposure to 7.4 and below as well)
✔✔The filter in a swimming pool should run for how long? - ✔✔Continuously
✔✔At what time interval should water in a spa, whirlpool or hot tub recirculate? -
✔✔Entire body of water should recirculate in 30 minutes (30 minute turnover rate)
✔✔In a recreational area with gender bathrooms, what is the ratio of toilets per person?
- ✔✔200 per person
✔✔A public park owner refuses to repair a sewage leak. What should the sanitarian do?
- ✔✔File an injunction/summary statement
✔✔If 100 people are attacked by a new disease of the total population of 70,000, the
attack rate per person is? - ✔✔Prevalence Rate (# of people with the disease/total #of
people in the population) x100
100/70,000X100=.14%
Incidence rate = (# of new cases of the disease/# of persons at risk) X 100---would be
the same %
✔✔Spa and hot tub maximum temperature is? - ✔✔104 degrees
✔✔A pool filtration system should filter the entire volume of water in the pool every? -
✔✔6-8 hours
✔✔Cyanuric acid additive is used in pools and spas to: - ✔✔Stabilizes the residual
chlorine level.
✔✔The addition of sodium bicarbonate is usually used to? - ✔✔Raise the alkalinity
(raise the pH).
✔✔What is a chemical that is commonly used to improve pool water clarity? - ✔✔Alum
(aluminum sulfate)
,✔✔the best control of swimmer's itch (which is caused by a protozoa) at a bathing
beach is to? - ✔✔Add copper sulfate
✔✔What is the normal operating free chlorine residual used in regular practice for
swimming pools? - ✔✔1-3mg/L
✔✔The ideal pH range for swimming pools is? - ✔✔7.2-7.6ppm
✔✔the fresh water line to a swimming pool must have what? - ✔✔The ability to fill the
pool through an approved air gap
✔✔Approved public swimming pools should have what? - ✔✔A pump that will re-
circulate the contents of the pool every 6-8 hours, a filter that is designed for the output
of the recirculation pump, a disinfection system capable of dosing an outdoor pool at
10mg/L (indoor pool 5mg/L) (CHOOSE ALL OF THE ABOVE.)
✔✔The recommended and most effective method of maintaining pool water quality is? -
✔✔Continuous recirculation, chlorination, and filtration.
✔✔HAZWOPER (Hazardous Waste Operations and Emergency Response)
requirement apply to? - ✔✔Voluntary clean up at uncontrolled hazardous waste sites.
✔✔What are the Levels of Emergency Warning (ER Planning and Response)? -
✔✔Level 1-ALERT, Level 2-EMERGENCY, Level 3-GENERAL EMERGENCY (Level 1
is an alert to everyone that a hazard may exist, Level 2 is a site specific/area specific
alert ER personnel only, and Level 3 is a general alert to all that ER does exist)
✔✔The senior emergency response official responding to an emergency is called? -
✔✔An Incident Commander
✔✔The US Dept. of Transportation (DOT) hazardous material regulations do what? -
✔✔identify the hazardous materials during the initial response phase of an accident.
✔✔What is the number ONE item, listed under emergency equipment and supplies? -
✔✔Water (2 gallons of water per person)
✔✔In case of disasters, the speed with which action may be implemented is dependent
upon what? - ✔✔Prior plans for emergencies
✔✔Emergency shelters should provide a minimum of how much space per person? -
✔✔30 square feet per person
, ✔✔What is the best way to protect a community drinking water supply/system from
terrorist activity? - ✔✔Routine surveillance
✔✔Which duty is most important for health personnel during a disaster? - ✔✔Medical
and dental services
✔✔Which are used as bioterrorist agents? - ✔✔Small pox and anthrax
✔✔Which one is not considered the responsibility of the incident commander during a
disaster incident? - ✔✔Finances
✔✔During a disaster, Health Personnel are? - ✔✔First responders
✔✔Which of the following is NOT a major source of sulfur dioxide? - ✔✔Electrical
substations
✔✔Which of the following is not a malodorous gas? - ✔✔Carbon Monoxide
✔✔What is a primary pollutant? - ✔✔One that is found in the atmosphere due to a
natural reaction, found in its natural form.
✔✔Particle size selective inlets are used to separate particulates above and below 2-3
microns in size on? - ✔✔High volume samplers
✔✔The Ringleman Smoke Chart method of evaluating particle pollution in the
atmosphere is being replaced by testing for what/or a determination of what? Also, the
new method for concentration measurements? - ✔✔Opacity-percent opacity
✔✔Which of the following are examples of short-range primary pollutants? - ✔✔Total
suspended solids and Sulfur dioxide.
✔✔The accumulation and/or increased concentration of a continuously emitted pollutant
is what? - ✔✔Inversely proportional to wind speed
✔✔For workers, a sound level above ____ dBA should be considered unsafe for daily
exposure over a period of months - ✔✔90 dBA
✔✔The most common type of noise measurement device used for initial surveys to
provide rapid evaluation and identification of potential problem areas is: - ✔✔The Sound
Level Meter
✔✔Obtain a stack sample at what air flow speed? - ✔✔The same speed of flow that
gases normally pass through the stack
