NEHA RS/REHS COMPREHENSIVE EXAM 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔Psychrophiles thrive in which temperatures - ✔✔50F (or lowest temp given)
✔✔What is a psittacosis - ✔✔Parrott
✔✔This can withstand high heat for extended period so is perfect for testing the
autoclave. - ✔✔Bacillus stearothermophilus
✔✔How do you test for Giardia - ✔✔Molecular testing
✔✔Order from most important to least: Core, Priority, Priority foundation - ✔✔Priority,
Priority foundation, Core
✔✔What is the purpose of Emergency Guide Book from Department of Transportation?
- ✔✔Quickly identify emergency hazards; deal with Transportation hazards within the
first 30 minutes
✔✔Which food can be saved after a flood: - ✔✔sealed canned food or retort Pouches
✔✔What pest or vector is NOT a Health concern after a flood - ✔✔Spider
✔✔What should the Cyanuric acid level be in a swimming pool - ✔✔30-50mg/L
✔✔What should the Chlorine level be in a swimming pool? - ✔✔1 ppm in pools
✔✔In a pool, which disinfectant is in active oxidation: - ✔✔Sodium hypochlorite (bleach)
✔✔Fill and draw wading pool should be - ✔✔prohibited
✔✔Calculation for pool turnover rate - ✔✔Pool Volume/Flow rate X 60 (minutes in
hour)= Turnover Rate
✔✔What temperature should you store pool test chemicals - ✔✔Store in a "cool"
location and keep away from heat
✔✔What temp do you store Pooled eggs that have not been treated for Salmonella -
✔✔41F
✔✔When you store food in refrigerator you should - ✔✔ensure air space around food
✔✔If Milk was heated to 198-212 F it considered to be - ✔✔Pasteurized
,✔✔What is the Sanitizer chlorine - ✔✔no
✔✔Foodborne illness starts less than 1 hour after eating - ✔✔chemical
✔✔Who control the shellfish tag - ✔✔FDA- National Shellfish Sanitation Program
✔✔Is the date on milk carton required - ✔✔No
✔✔When you transfer food into another container to hold for more than 24 hours, must
label new container with: - ✔✔Use by date
✔✔What happens to toxins in forzen foods - ✔✔Toxins are not affected
✔✔You can see frozen food has thawed and been refrozen in these ways: - ✔✔ice
crystal, ice melt, food frozen in a block
✔✔What is the critical control point in food preparation? - ✔✔A step when control is
essential to prevent or eliminate or reduce a food safety hazard
✔✔What is a Control Point - ✔✔Any step at which biological, chemical, or physical
factors can be controlled.
✔✔What item is NOT REQUIRED at a handwashing sink? - ✔✔Sanitary towels
✔✔Moderating the frying temperature from -4F to 25F to aid in deep frying is called: -
✔✔Slacking (the process of allowing block-frozen food to gradually increase from a
temperature of -10°F (-23°C) to 25°F (-4°C) in preparation for deep-fat frying
✔✔Meat inspection corresponds with which shape - ✔✔circle
✔✔Distance from sewage disposal and water line in mobile home - ✔✔10ft
✔✔When placing a septic tank what is NOT important? - ✔✔Distance to bedrock
✔✔What is NOT a good way of inspecting for a seasonal water table levels? - ✔✔bored
hole
✔✔Workers at wastewater treatment plant get - ✔✔Hepatitis A
✔✔What biological form moves fastest in soil? - ✔✔bacteria
, ✔✔What is a Cathode - ✔✔The electrode of an electrochemical cell at which reduction
is the principal reaction. (Electrons flow toward the cathode in the external circuit.)
✔✔What are the forms of corrosion protection for underground pipes? (NACE) -
✔✔material selection, system design, and coatings
✔✔Soil with low-Resistivity are more or less corrosive then high-resistivity soils? -
✔✔Usually more
✔✔What can stop alpha particles? - ✔✔A sheet of paper (or a few inches of air)
✔✔How can you reduce lead poisoning? - ✔✔eliminating lead in paint
✔✔Paint in house before 1978 - ✔✔contain lead
✔✔Trichloroethylene is used in: - ✔✔solvents to remove grease from metal parts and
as a chemical that is used to make other chemicals
✔✔If the house has gas oven, need to check for smoke detector and what detector? -
✔✔CO2 detector
✔✔Who regulates the disposal of Household Hazardous wastes? - ✔✔Local (exempt
from RCRA)
✔✔MCL stands for - ✔✔Maximum contaminate Level
✔✔Prevalence rate - ✔✔is the proportion of persons in a population who have a
particular disease or attribute at a specified point in time or over a specified period of
time.
✔✔What is a max permissible dose? - ✔✔Maximum permissible dose sets limits for
adult radiation workers
✔✔Silicosis Is caused by: - ✔✔silica dust
✔✔The action of doing nothing despite finding a violation - ✔✔Nonfeasance
✔✔Doing the wrong thing the wrong way - ✔✔Malfeasance
✔✔A water treatment plant should have: - ✔✔A well-equipped laboratory, certified
operator, and qualified chemist
QUESTIONS AND SOLUTIONS RATED A+
✔✔Psychrophiles thrive in which temperatures - ✔✔50F (or lowest temp given)
✔✔What is a psittacosis - ✔✔Parrott
✔✔This can withstand high heat for extended period so is perfect for testing the
autoclave. - ✔✔Bacillus stearothermophilus
✔✔How do you test for Giardia - ✔✔Molecular testing
✔✔Order from most important to least: Core, Priority, Priority foundation - ✔✔Priority,
Priority foundation, Core
✔✔What is the purpose of Emergency Guide Book from Department of Transportation?
- ✔✔Quickly identify emergency hazards; deal with Transportation hazards within the
first 30 minutes
✔✔Which food can be saved after a flood: - ✔✔sealed canned food or retort Pouches
✔✔What pest or vector is NOT a Health concern after a flood - ✔✔Spider
✔✔What should the Cyanuric acid level be in a swimming pool - ✔✔30-50mg/L
✔✔What should the Chlorine level be in a swimming pool? - ✔✔1 ppm in pools
✔✔In a pool, which disinfectant is in active oxidation: - ✔✔Sodium hypochlorite (bleach)
✔✔Fill and draw wading pool should be - ✔✔prohibited
✔✔Calculation for pool turnover rate - ✔✔Pool Volume/Flow rate X 60 (minutes in
hour)= Turnover Rate
✔✔What temperature should you store pool test chemicals - ✔✔Store in a "cool"
location and keep away from heat
✔✔What temp do you store Pooled eggs that have not been treated for Salmonella -
✔✔41F
✔✔When you store food in refrigerator you should - ✔✔ensure air space around food
✔✔If Milk was heated to 198-212 F it considered to be - ✔✔Pasteurized
,✔✔What is the Sanitizer chlorine - ✔✔no
✔✔Foodborne illness starts less than 1 hour after eating - ✔✔chemical
✔✔Who control the shellfish tag - ✔✔FDA- National Shellfish Sanitation Program
✔✔Is the date on milk carton required - ✔✔No
✔✔When you transfer food into another container to hold for more than 24 hours, must
label new container with: - ✔✔Use by date
✔✔What happens to toxins in forzen foods - ✔✔Toxins are not affected
✔✔You can see frozen food has thawed and been refrozen in these ways: - ✔✔ice
crystal, ice melt, food frozen in a block
✔✔What is the critical control point in food preparation? - ✔✔A step when control is
essential to prevent or eliminate or reduce a food safety hazard
✔✔What is a Control Point - ✔✔Any step at which biological, chemical, or physical
factors can be controlled.
✔✔What item is NOT REQUIRED at a handwashing sink? - ✔✔Sanitary towels
✔✔Moderating the frying temperature from -4F to 25F to aid in deep frying is called: -
✔✔Slacking (the process of allowing block-frozen food to gradually increase from a
temperature of -10°F (-23°C) to 25°F (-4°C) in preparation for deep-fat frying
✔✔Meat inspection corresponds with which shape - ✔✔circle
✔✔Distance from sewage disposal and water line in mobile home - ✔✔10ft
✔✔When placing a septic tank what is NOT important? - ✔✔Distance to bedrock
✔✔What is NOT a good way of inspecting for a seasonal water table levels? - ✔✔bored
hole
✔✔Workers at wastewater treatment plant get - ✔✔Hepatitis A
✔✔What biological form moves fastest in soil? - ✔✔bacteria
, ✔✔What is a Cathode - ✔✔The electrode of an electrochemical cell at which reduction
is the principal reaction. (Electrons flow toward the cathode in the external circuit.)
✔✔What are the forms of corrosion protection for underground pipes? (NACE) -
✔✔material selection, system design, and coatings
✔✔Soil with low-Resistivity are more or less corrosive then high-resistivity soils? -
✔✔Usually more
✔✔What can stop alpha particles? - ✔✔A sheet of paper (or a few inches of air)
✔✔How can you reduce lead poisoning? - ✔✔eliminating lead in paint
✔✔Paint in house before 1978 - ✔✔contain lead
✔✔Trichloroethylene is used in: - ✔✔solvents to remove grease from metal parts and
as a chemical that is used to make other chemicals
✔✔If the house has gas oven, need to check for smoke detector and what detector? -
✔✔CO2 detector
✔✔Who regulates the disposal of Household Hazardous wastes? - ✔✔Local (exempt
from RCRA)
✔✔MCL stands for - ✔✔Maximum contaminate Level
✔✔Prevalence rate - ✔✔is the proportion of persons in a population who have a
particular disease or attribute at a specified point in time or over a specified period of
time.
✔✔What is a max permissible dose? - ✔✔Maximum permissible dose sets limits for
adult radiation workers
✔✔Silicosis Is caused by: - ✔✔silica dust
✔✔The action of doing nothing despite finding a violation - ✔✔Nonfeasance
✔✔Doing the wrong thing the wrong way - ✔✔Malfeasance
✔✔A water treatment plant should have: - ✔✔A well-equipped laboratory, certified
operator, and qualified chemist
