NEHA REHS/RS Exam - Practice Questions

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

A

If 15x + 3 = 7x - 13, then x equals
a. - 2.0
b. +2.0
c. +2.5
d. +4.0

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

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.

C

An epidemiological study which follows a
group of people over time is a _____ study.
a. regressive
b. prospective
c. progressive
d. retrospective

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

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.

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

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.

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.

D

Which statement about hydraulic
conductivity in soils is true?
a. Hydraulic conductivity increases for
all soils as they dry.
b. Soils with small, discontinuous
water-filled pores have high
hydraulic conductivity.
c. Unsaturated soils with large air-filled
pores have a high hydraulic
conductivity.
d. As soils dry, the hydraulic
conductivity of clay soils can
become greater than that of sandy
soils.

D

Assuming a high-rate sand filter is
operated at 15 gallons per minute per
square foot, the minimum size filter
needed for a 36,000-gallon swimming
pool operating with a six hour turnover
rate is _____ square feet.
a. 6.67
b. 12.72
c. 23.33
d. 40.01

A

In the event of a natural disaster, the
safest source of drinking water would be
from a(an)
a. toilet tank.
b. open cistern.
c. water heater.
d. swimming pool.

C

Radon does not have the characteristic of
a. being known to cause cancer.
b. having a long half-life.
c. having the ability to enter homes
through a water well.
d. occurring naturally in the soil.

B

The causative agent of Weil's Disease
resulting from direct or indirect contact
with the infected urine of rodents and
certain other animals is _____ spp.
a. Yersinia
b. Leptospira
c. Rickettsia
d. Wuchereria

B

Inhalation of asbestos fibers may cause
asbestosis,
a. cancer, and mesothelioma.
b. eye irritation, and skin rash.
c. coughing, and pulmonary edema.
d. lyphotheliomia, and sensitization.

A

The problems associated with
pneumoconiosis are not heavily
influenced by the
a. rate of pressure rise.
b. size of dust particles.
c. length of particle exposure.
d. concentration of airborne dusts.

A

The determination of overcrowding in
residential units is based on the number of
persons per
a. bedroom.
b. net square feet of habitable room.
c. gross square feet of residential unit.
d. cubic feet of airspace in dwelling
unit.

B

Which situation best describes an
incompatible land-use?
a. One property is adversely impacted
by the environmental pollutants
generated on an adjacent parcel.
b. The value of one property is greatly
increased because of the presence
of a more valuable land-use for
nearby property or properties.
c. The land-use allowed on one
property adversely affects the
health of the residents on an
adjacent property.
d. The land-use allowed on one parcel
or property adversely impacts or
restricts the use of an adjacent or
nearby property or properties.

D

Two identical pumps located side-by-side
produce a sound level of 80 dBA at a
distance of 10 feet. If one of the pumps
is turned off, the sound level at 10 feet
is dBA.
a. 40
b. 70
c. 77
d. 80

C