NRRPT Study Guide Exam Latest
2026/2027 Updated Verified
Questions and Solutions A+ Pass
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Effects of acute radiation exposure on the central nervous system can be
observed at doses of:
- ANS - 1000 rads.
Genetic effects produced by radiation in males are dependent on:
1. State of germ cell development
2. LET of the radiation
3. Interval between the exposure and conception
- ANS - 1,2,3
What is the "threshold" of radiation dose effects?
- ANS - The dose of radiation below which there are no effects whatsoever
on the body
The three naturally-occurring radioactive decay chains are:
- ANS - Thorium, Actinium, Uranium
, Which radionuclide is NOT a naturally occurring radionuclide?
- ANS - Cs-137
The dose equivalent to the U.S. population from all man-made sources of
radiation is given by the NCRP as approximately
- ANS - 60 mrem/year
Most of the dose received by man from man-made sources of radiation is
due to:
- ANS - medical applications of radiation and radioactive materials.
One Roentgen is equal to:
- ANS - 2.58 x 10-4 coulomb/kg air.
For an isotope having an allowed concentration of 1 x 10-5 µCi /cc, what
is the minimum discharge time to not exceed the concentration when 1.5
curies of activity are discharged into a stream having a flow rate of
140,000 gallons/hour? (1 gallon = 3785.6 cc).
- ANS - 283 hours
The energy absorbed by 1 gram of air exposed to 1 Roentgen of gamma
rays is equivalent to:
- ANS - 87 ergs.
All of the following statements about atomic structure are true EXCEPT:
- ANS - Electrons, protons, and neutrons are all of about equal mass
2026/2027 Updated Verified
Questions and Solutions A+ Pass
Guaranteed
Effects of acute radiation exposure on the central nervous system can be
observed at doses of:
- ANS - 1000 rads.
Genetic effects produced by radiation in males are dependent on:
1. State of germ cell development
2. LET of the radiation
3. Interval between the exposure and conception
- ANS - 1,2,3
What is the "threshold" of radiation dose effects?
- ANS - The dose of radiation below which there are no effects whatsoever
on the body
The three naturally-occurring radioactive decay chains are:
- ANS - Thorium, Actinium, Uranium
, Which radionuclide is NOT a naturally occurring radionuclide?
- ANS - Cs-137
The dose equivalent to the U.S. population from all man-made sources of
radiation is given by the NCRP as approximately
- ANS - 60 mrem/year
Most of the dose received by man from man-made sources of radiation is
due to:
- ANS - medical applications of radiation and radioactive materials.
One Roentgen is equal to:
- ANS - 2.58 x 10-4 coulomb/kg air.
For an isotope having an allowed concentration of 1 x 10-5 µCi /cc, what
is the minimum discharge time to not exceed the concentration when 1.5
curies of activity are discharged into a stream having a flow rate of
140,000 gallons/hour? (1 gallon = 3785.6 cc).
- ANS - 283 hours
The energy absorbed by 1 gram of air exposed to 1 Roentgen of gamma
rays is equivalent to:
- ANS - 87 ergs.
All of the following statements about atomic structure are true EXCEPT:
- ANS - Electrons, protons, and neutrons are all of about equal mass
