NRRPT, NRRPT Exam Review, Questions
and Verified Answers, 100% Score
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Effects of acute radiation exposure on the central nervous
system can be
observed at doses of: - Correct Answers ✅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 - Correct
Answers ✅1,2,3
What is the "threshold" of radiation dose effects? - Correct
Answers ✅The dose of radiation below which there are no
effects whatsoever on the body
The three naturally-occurring radioactive decay chains are: -
Correct Answers ✅Thorium, Actinium, Uranium
Which radionuclide is NOT a naturally occurring radionuclide?
- Correct Answers ✅Cs-137
The dose equivalent to the U.S. population from all man-
made sources of
,NRRPT, NRRPT Exam Review, Questions
and Verified Answers, 100% Score
Guarantee Pass (Latest 2025)
radiation is given by the NCRP as approximately - Correct
Answers ✅60 mrem/year
Most of the dose received by man from man-made sources of
radiation is due to: - Correct Answers ✅medical
applications of radiation and radioactive materials.
One Roentgen is equal to: - Correct Answers ✅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). - Correct Answers ✅283 hours
The energy absorbed by 1 gram of air exposed to 1 Roentgen
of gamma rays is equivalent to: - Correct Answers ✅87
ergs.
All of the following statements about atomic structure are
true EXCEPT: - Correct Answers ✅Electrons, protons, and
neutrons are all of about equal mass
,NRRPT, NRRPT Exam Review, Questions
and Verified Answers, 100% Score
Guarantee Pass (Latest 2025)
The radius of the nucleus of an atom as compared to the
atom as a whole is: - Correct Answers ✅some 10,000
times smaller.
Isotopes are: - Correct Answers ✅forms of the same
element containing different numbers of neutrons.
What are isotones? - Correct Answers ✅nuclides with the
same number of neutrons
Emission of a negatively charged beta particle results from
the transformation of: - Correct Answers ✅a neutron into a
proton.
Following electron capture, the following processes may
occur:
1. Z increases by 1
2. Z decreases by 1
3. Characteristic x-rays are emitted
4. Auger electron emission - Correct Answers ✅2,3,4
A technician surveys a shielded pure beta-emitting source
and obtains a measurement of 0.2 R/hr. If all beta particles
are shielded, the reading is caused by: - Correct Answers
✅Bremsstrahlung.
, NRRPT, NRRPT Exam Review, Questions
and Verified Answers, 100% Score
Guarantee Pass (Latest 2025)
The dose to tissue from 6 MeV neutrons is delivered primarily
by: - Correct Answers ✅recoil protons.
In the interaction of thermal neutrons with tissue, the major
dose is from: - Correct Answers ✅the H-1(n,gamma)H-2
reaction
The average energy required to produce an ion pair in air by
x or gamma radiation is which of the following? - Correct
Answers ✅33.7 eV
Which of the organ systems is the MOST radiosensitive -
Correct Answers ✅Bone marrow
Which of the following are considered risks of chronic low-
level radiation exposure?
1. Sterility
2. Leukemia
3. Cataracts
4. Skin erythema - Correct Answers ✅2
Which radionuclide is a bone seeker? - Correct Answers
✅Ca-45
and Verified Answers, 100% Score
Guarantee Pass (Latest 2025)
Effects of acute radiation exposure on the central nervous
system can be
observed at doses of: - Correct Answers ✅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 - Correct
Answers ✅1,2,3
What is the "threshold" of radiation dose effects? - Correct
Answers ✅The dose of radiation below which there are no
effects whatsoever on the body
The three naturally-occurring radioactive decay chains are: -
Correct Answers ✅Thorium, Actinium, Uranium
Which radionuclide is NOT a naturally occurring radionuclide?
- Correct Answers ✅Cs-137
The dose equivalent to the U.S. population from all man-
made sources of
,NRRPT, NRRPT Exam Review, Questions
and Verified Answers, 100% Score
Guarantee Pass (Latest 2025)
radiation is given by the NCRP as approximately - Correct
Answers ✅60 mrem/year
Most of the dose received by man from man-made sources of
radiation is due to: - Correct Answers ✅medical
applications of radiation and radioactive materials.
One Roentgen is equal to: - Correct Answers ✅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). - Correct Answers ✅283 hours
The energy absorbed by 1 gram of air exposed to 1 Roentgen
of gamma rays is equivalent to: - Correct Answers ✅87
ergs.
All of the following statements about atomic structure are
true EXCEPT: - Correct Answers ✅Electrons, protons, and
neutrons are all of about equal mass
,NRRPT, NRRPT Exam Review, Questions
and Verified Answers, 100% Score
Guarantee Pass (Latest 2025)
The radius of the nucleus of an atom as compared to the
atom as a whole is: - Correct Answers ✅some 10,000
times smaller.
Isotopes are: - Correct Answers ✅forms of the same
element containing different numbers of neutrons.
What are isotones? - Correct Answers ✅nuclides with the
same number of neutrons
Emission of a negatively charged beta particle results from
the transformation of: - Correct Answers ✅a neutron into a
proton.
Following electron capture, the following processes may
occur:
1. Z increases by 1
2. Z decreases by 1
3. Characteristic x-rays are emitted
4. Auger electron emission - Correct Answers ✅2,3,4
A technician surveys a shielded pure beta-emitting source
and obtains a measurement of 0.2 R/hr. If all beta particles
are shielded, the reading is caused by: - Correct Answers
✅Bremsstrahlung.
, NRRPT, NRRPT Exam Review, Questions
and Verified Answers, 100% Score
Guarantee Pass (Latest 2025)
The dose to tissue from 6 MeV neutrons is delivered primarily
by: - Correct Answers ✅recoil protons.
In the interaction of thermal neutrons with tissue, the major
dose is from: - Correct Answers ✅the H-1(n,gamma)H-2
reaction
The average energy required to produce an ion pair in air by
x or gamma radiation is which of the following? - Correct
Answers ✅33.7 eV
Which of the organ systems is the MOST radiosensitive -
Correct Answers ✅Bone marrow
Which of the following are considered risks of chronic low-
level radiation exposure?
1. Sterility
2. Leukemia
3. Cataracts
4. Skin erythema - Correct Answers ✅2
Which radionuclide is a bone seeker? - Correct Answers
✅Ca-45
