IEG REHS/RS Practice Exam 2025/2026 Set 3 Questions
With Complete Solutions
It takes ______ half-lives to reduce the radioactivity of a
radionuclide to about 1% of what it was when first measured.
a. 200
b. 125
c. 75
d. 7
d. 7
The best way to control deep fires in a sanitary landfill is to
a. inject water under the cover material at strategic points
throughout the landfill
b. separate the burning refuse and dig a firebreak around the
burning refuse
c. smother the burning area with landfill liner made of polymeric
or asphaltic materials
d. let the area burn itself out
b. separate the burning refuse and dig a firebreak around the
burning refuse
Which of the following is not a common refrigerant?
a. carbon dioxide
b. methyl chloride
c. sulfur dioxide
d. nitrogen oxide
d. nitrogen oxide
, Wastewater is the used water from a home or community and
the strength is expressed in terms of
a. biological oxygen demand (BOD)
b. chemical oxygen demand (COD)
c. suspended solids
d. all the above
d. all the above
A minimum of ______ of sleeping area per person is required in
the APHA appraisal method.
a. 10 ft2
b 20 ft2
c. 40 ft2
d. 60 ft2
c. 40 ft2
The Toxic Substances Control Act (TSCA) of 1976
a. mandates government (Federal and State) control of
hazardous wastes from their point of generation to their point of
ultimate disposal
b. regulates the production and use of chemical substances that
may present an unreasonable risk of injury to health or
environment
c. requires that all toxic substances transported from one point to
another by air, land, or sea be properly documented through an
approved manifest system
d. regulates all hazardous wastes generated at health care
facilities through Federal and State governments
With Complete Solutions
It takes ______ half-lives to reduce the radioactivity of a
radionuclide to about 1% of what it was when first measured.
a. 200
b. 125
c. 75
d. 7
d. 7
The best way to control deep fires in a sanitary landfill is to
a. inject water under the cover material at strategic points
throughout the landfill
b. separate the burning refuse and dig a firebreak around the
burning refuse
c. smother the burning area with landfill liner made of polymeric
or asphaltic materials
d. let the area burn itself out
b. separate the burning refuse and dig a firebreak around the
burning refuse
Which of the following is not a common refrigerant?
a. carbon dioxide
b. methyl chloride
c. sulfur dioxide
d. nitrogen oxide
d. nitrogen oxide
, Wastewater is the used water from a home or community and
the strength is expressed in terms of
a. biological oxygen demand (BOD)
b. chemical oxygen demand (COD)
c. suspended solids
d. all the above
d. all the above
A minimum of ______ of sleeping area per person is required in
the APHA appraisal method.
a. 10 ft2
b 20 ft2
c. 40 ft2
d. 60 ft2
c. 40 ft2
The Toxic Substances Control Act (TSCA) of 1976
a. mandates government (Federal and State) control of
hazardous wastes from their point of generation to their point of
ultimate disposal
b. regulates the production and use of chemical substances that
may present an unreasonable risk of injury to health or
environment
c. requires that all toxic substances transported from one point to
another by air, land, or sea be properly documented through an
approved manifest system
d. regulates all hazardous wastes generated at health care
facilities through Federal and State governments
