NEHA REHS/RS Exam - Practice Exam
Questions with Complete Solutions
(Latest 2025/2026).
The Inverse Square Law is commonly used
in which environmental health program
areas to calculate the intensity or strength
of a substance at a specified distance from
the point source?
a. radiation, lighting, and noise
b. noise, air emissions, and radiation
c. radiation, fluoridation in water,
lighting, and noise
d. lighting, sewage contamination in
stream, and air emissions - CORRECT ANSWERS A
If 15x + 3 = 7x - 13, then x equals
a. - 2.0
b. +2.0
c. +2.5
d. +4.0 - CORRECT ANSWERS A
What is the legal term which describes the
failure to perform an official duty as an
Environmental Health Specialist without
sufficient excuse?
a. malfeasance
b. misfeasance
c. nonfeasance
d. criminal responsibility - CORRECT ANSWERS C
In the field of public health law, state
government's police power is an attribute
of a sovereign government; whereas, the
federal government is a government of
a. absolute police power.
b. delegated police power.
c. limited delegated powers.
d. constitutional police power. - CORRECT ANSWERS C
An epidemiological study which follows a
group of people over time is a _____ study.
a. regressive
b. prospective
c. progressive
d. retrospective - CORRECT ANSWERS B
, A sample collected over a short time period
where the atmospheric concentration is
assumed to be consistent throughout the
sample period is called
a(an) _____ sample.
a. grab
b. small
c. partial
d. integrated - CORRECT ANSWERS A
Adequate cooking will not always
prevent Clostridium perfringens food
poisoning because
a. the enterotoxin is heat stable.
b. the spores are heat-resistant and
may survive.
c. it is a rapidly growing pyrophilic
organism.
d. incomplete heat distribution results
in new bacterial colony formation. - CORRECT ANSWERS B
The level that a vacuum breaker must
be installed above the flood rim of the
fixture or receptacle it is serving is called
the _____ level.
a. installation
b. anti-siphoned
c. critical
d. backflow - CORRECT ANSWERS C
Pursuant to the California Right to Know
Law, facilities that handle hazardous
materials are primarily required to submit
a. Material Safety Data Sheets.
b. a business plan.
c. a list of all hazardous materials.
d. a list of all acutely hazardous
materials. - CORRECT ANSWERS B
The Paint Filter Liquid Test is used at
landfills to determine
a. the soil permeability of cover
material.
b. the sludge content of incoming
waste.
c. if leachates have been formed.
d. if wastes may be landfilled. - CORRECT ANSWERS D
Questions with Complete Solutions
(Latest 2025/2026).
The Inverse Square Law is commonly used
in which environmental health program
areas to calculate the intensity or strength
of a substance at a specified distance from
the point source?
a. radiation, lighting, and noise
b. noise, air emissions, and radiation
c. radiation, fluoridation in water,
lighting, and noise
d. lighting, sewage contamination in
stream, and air emissions - CORRECT ANSWERS A
If 15x + 3 = 7x - 13, then x equals
a. - 2.0
b. +2.0
c. +2.5
d. +4.0 - CORRECT ANSWERS A
What is the legal term which describes the
failure to perform an official duty as an
Environmental Health Specialist without
sufficient excuse?
a. malfeasance
b. misfeasance
c. nonfeasance
d. criminal responsibility - CORRECT ANSWERS C
In the field of public health law, state
government's police power is an attribute
of a sovereign government; whereas, the
federal government is a government of
a. absolute police power.
b. delegated police power.
c. limited delegated powers.
d. constitutional police power. - CORRECT ANSWERS C
An epidemiological study which follows a
group of people over time is a _____ study.
a. regressive
b. prospective
c. progressive
d. retrospective - CORRECT ANSWERS B
, A sample collected over a short time period
where the atmospheric concentration is
assumed to be consistent throughout the
sample period is called
a(an) _____ sample.
a. grab
b. small
c. partial
d. integrated - CORRECT ANSWERS A
Adequate cooking will not always
prevent Clostridium perfringens food
poisoning because
a. the enterotoxin is heat stable.
b. the spores are heat-resistant and
may survive.
c. it is a rapidly growing pyrophilic
organism.
d. incomplete heat distribution results
in new bacterial colony formation. - CORRECT ANSWERS B
The level that a vacuum breaker must
be installed above the flood rim of the
fixture or receptacle it is serving is called
the _____ level.
a. installation
b. anti-siphoned
c. critical
d. backflow - CORRECT ANSWERS C
Pursuant to the California Right to Know
Law, facilities that handle hazardous
materials are primarily required to submit
a. Material Safety Data Sheets.
b. a business plan.
c. a list of all hazardous materials.
d. a list of all acutely hazardous
materials. - CORRECT ANSWERS B
The Paint Filter Liquid Test is used at
landfills to determine
a. the soil permeability of cover
material.
b. the sludge content of incoming
waste.
c. if leachates have been formed.
d. if wastes may be landfilled. - CORRECT ANSWERS D
