NEHA REHS RS EXAMINATION REVIEW WORK
EXAMS 2026/2027 | 3 Latest Answered Sets |
Registered Environmental Health Specialist | Pass
Guaranteed - A+ Graded
EXAM SET 1
Environmental Health Foundations & Regulations
(15 Questions)
Q1: The primary federal agency responsible for setting maximum contaminant levels
(MCLs) for public drinking water systems under the Safe Drinking Water Act is:
A. The National Environmental Health Association (NEHA)
B. The Occupational Safety and Health Administration (OSHA)
C. The Environmental Protection Agency (EPA) [CORRECT]
D. The Centers for Disease Control and Prevention (CDC)
Correct Answer: C
Rationale: The best answer is C. The EPA establishes and enforces MCLs for
regulated contaminants in public water systems under the Safe Drinking Water Act.
NEHA is a professional credentialing organization, not a regulatory agency; OSHA
governs workplace safety; and the CDC focuses on disease prevention and health
promotion rather than drinking water standards.
,Q2: A registered environmental health specialist is conducting a routine restaurant
inspection. Under the FDA Food Code, the temperature danger zone for potentially
hazardous foods is defined as:
A. 32°F to 140°F
B. 41°F to 135°F [CORRECT]
C. 45°F to 165°F
D. 50°F to 130°F
Correct Answer: B
Rationale: The best answer is B. The FDA Food Code defines the temperature danger
zone as 41°F to 135°F, meaning potentially hazardous foods must be held below 41°F
or above 135°F to inhibit bacterial growth. Option A uses 32°F, which is freezing and
not the cold holding standard; option C uses 45°F, which exceeds the safe cold
holding limit; and option D uses incorrect boundaries that don't align with the Food
Code.
Q3: During a foodborne illness outbreak investigation, the environmental health
specialist calculates attack rates by dividing:
A. The number of ill persons by the total number of exposed persons [CORRECT]
B. The number of hospitalizations by the total number of cases
C. The number of positive lab specimens by the total number of specimens collected
D. The number of deaths by the total number of ill persons
Correct Answer: A
Rationale: The best answer is A. Attack rate is an epidemiologic measure calculated
as the number of people who became ill divided by the total number of people
exposed to a suspected vehicle, typically expressed as a percentage. This helps
identify which food item or exposure is most strongly associated with illness. The
other options describe case fatality rate, laboratory positivity rate, and mortality rate,
respectively.
,Q4: The principle of "due process" in environmental health enforcement requires
that:
A. Violations must be corrected immediately upon discovery without written notice
B. The regulated party must receive adequate notice, a fair hearing, and an
opportunity to respond [CORRECT]
C. Penalties are automatically doubled for repeat violations
D. Inspections may only be conducted with a search warrant
Correct Answer: B
Rationale: The best answer is B. Due process in administrative law means the
regulated entity must be given proper notice of alleged violations, an opportunity to
present evidence, and a fair hearing before adverse action is taken. Option A violates
due process by skipping notice; option C describes enhanced penalties, not
procedural fairness; and option D is incorrect because routine inspections are
generally conducted under statutory authority without warrants.
Q5: A properly designed septic tank should have a minimum liquid depth of:
A. 18 inches
B. 30 inches
C. 42 inches [CORRECT]
D. 60 inches
Correct Answer: C
Rationale: The best answer is C. Standard septic tank design calls for a minimum
liquid depth of 42 inches (3.5 feet) to provide adequate retention time for solids
settling and anaerobic digestion. Depths less than 42 inches don't allow sufficient
settling, while 60 inches is deeper than typical residential tank design and would
create unnecessary excavation costs without proportional benefit.
, Q6: Under RCRA, a "small quantity generator" (SQG) of hazardous waste generates
between:
A. 0 and 100 kg per month
B. 100 and 1,000 kg per month [CORRECT]
C. 1,000 and 5,000 kg per month
D. More than 5,000 kg per month
Correct Answer: B
Rationale: The best answer is B. RCRA defines a small quantity generator as one that
generates more than 100 kg but less than 1,000 kg of hazardous waste per month.
Very small quantity generators produce 100 kg or less; large quantity generators
produce 1,000 kg or more. Option C and D describe categories that don't exist under
current RCRA generator classification.
Q7: The most common cause of foodborne illness outbreaks in the United States,
according to CDC surveillance data, is:
A. Chemical contamination from cleaning agents
B. Norovirus [CORRECT]
C. Clostridium botulinum
D. Listeria monocytogenes
Correct Answer: B
Rationale: The best answer is B. Norovirus is consistently the leading cause of
foodborne illness outbreaks in the U.S., responsible for the majority of outbreaks and
a large proportion of individual illnesses, typically transmitted by infected food
handlers. While C. botulinum and L. monocytogenes are serious, they cause far fewer
outbreaks; chemical contamination is relatively rare compared to viral and bacterial
agents.
EXAMS 2026/2027 | 3 Latest Answered Sets |
Registered Environmental Health Specialist | Pass
Guaranteed - A+ Graded
EXAM SET 1
Environmental Health Foundations & Regulations
(15 Questions)
Q1: The primary federal agency responsible for setting maximum contaminant levels
(MCLs) for public drinking water systems under the Safe Drinking Water Act is:
A. The National Environmental Health Association (NEHA)
B. The Occupational Safety and Health Administration (OSHA)
C. The Environmental Protection Agency (EPA) [CORRECT]
D. The Centers for Disease Control and Prevention (CDC)
Correct Answer: C
Rationale: The best answer is C. The EPA establishes and enforces MCLs for
regulated contaminants in public water systems under the Safe Drinking Water Act.
NEHA is a professional credentialing organization, not a regulatory agency; OSHA
governs workplace safety; and the CDC focuses on disease prevention and health
promotion rather than drinking water standards.
,Q2: A registered environmental health specialist is conducting a routine restaurant
inspection. Under the FDA Food Code, the temperature danger zone for potentially
hazardous foods is defined as:
A. 32°F to 140°F
B. 41°F to 135°F [CORRECT]
C. 45°F to 165°F
D. 50°F to 130°F
Correct Answer: B
Rationale: The best answer is B. The FDA Food Code defines the temperature danger
zone as 41°F to 135°F, meaning potentially hazardous foods must be held below 41°F
or above 135°F to inhibit bacterial growth. Option A uses 32°F, which is freezing and
not the cold holding standard; option C uses 45°F, which exceeds the safe cold
holding limit; and option D uses incorrect boundaries that don't align with the Food
Code.
Q3: During a foodborne illness outbreak investigation, the environmental health
specialist calculates attack rates by dividing:
A. The number of ill persons by the total number of exposed persons [CORRECT]
B. The number of hospitalizations by the total number of cases
C. The number of positive lab specimens by the total number of specimens collected
D. The number of deaths by the total number of ill persons
Correct Answer: A
Rationale: The best answer is A. Attack rate is an epidemiologic measure calculated
as the number of people who became ill divided by the total number of people
exposed to a suspected vehicle, typically expressed as a percentage. This helps
identify which food item or exposure is most strongly associated with illness. The
other options describe case fatality rate, laboratory positivity rate, and mortality rate,
respectively.
,Q4: The principle of "due process" in environmental health enforcement requires
that:
A. Violations must be corrected immediately upon discovery without written notice
B. The regulated party must receive adequate notice, a fair hearing, and an
opportunity to respond [CORRECT]
C. Penalties are automatically doubled for repeat violations
D. Inspections may only be conducted with a search warrant
Correct Answer: B
Rationale: The best answer is B. Due process in administrative law means the
regulated entity must be given proper notice of alleged violations, an opportunity to
present evidence, and a fair hearing before adverse action is taken. Option A violates
due process by skipping notice; option C describes enhanced penalties, not
procedural fairness; and option D is incorrect because routine inspections are
generally conducted under statutory authority without warrants.
Q5: A properly designed septic tank should have a minimum liquid depth of:
A. 18 inches
B. 30 inches
C. 42 inches [CORRECT]
D. 60 inches
Correct Answer: C
Rationale: The best answer is C. Standard septic tank design calls for a minimum
liquid depth of 42 inches (3.5 feet) to provide adequate retention time for solids
settling and anaerobic digestion. Depths less than 42 inches don't allow sufficient
settling, while 60 inches is deeper than typical residential tank design and would
create unnecessary excavation costs without proportional benefit.
, Q6: Under RCRA, a "small quantity generator" (SQG) of hazardous waste generates
between:
A. 0 and 100 kg per month
B. 100 and 1,000 kg per month [CORRECT]
C. 1,000 and 5,000 kg per month
D. More than 5,000 kg per month
Correct Answer: B
Rationale: The best answer is B. RCRA defines a small quantity generator as one that
generates more than 100 kg but less than 1,000 kg of hazardous waste per month.
Very small quantity generators produce 100 kg or less; large quantity generators
produce 1,000 kg or more. Option C and D describe categories that don't exist under
current RCRA generator classification.
Q7: The most common cause of foodborne illness outbreaks in the United States,
according to CDC surveillance data, is:
A. Chemical contamination from cleaning agents
B. Norovirus [CORRECT]
C. Clostridium botulinum
D. Listeria monocytogenes
Correct Answer: B
Rationale: The best answer is B. Norovirus is consistently the leading cause of
foodborne illness outbreaks in the U.S., responsible for the majority of outbreaks and
a large proportion of individual illnesses, typically transmitted by infected food
handlers. While C. botulinum and L. monocytogenes are serious, they cause far fewer
outbreaks; chemical contamination is relatively rare compared to viral and bacterial
agents.
