DOE CORE (RCT) PRACTICE EXAM 2025
QUESTIONS AND ANSWERS
Atomic Mass - ANS The actual weight of a particular isotope in AMU
The atomic # is the # of: - ANS Protons in the nucleus
The periodic table of the elements lists all known elements in order of: - ANS Increasing
atomic #
An action on an object that could cause the object to change speed or direction is identified as -
ANS Force
The Law of Conservation of Energy states that the: - ANS Total amount of energy in a closed
system remains unchanged
When the nucleons are combined to form a nucleus some of the mass is: - ANS Converted to
binding. energy
The equation E=mc^2 states that: - ANS Mass & energy are equivalent
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, When two or more light nuclei combine to from a large nucleus in fusion, this changes the: -
ANS Binding energy
Isotopes are defined as nuclides w/ the same: - ANS # of protons but a different # of
neutrons
The average dose, to the general population of the US, from all combined medical exposures as
part of man-made background radiation sources is approximately - ANS 53 mRem/yr
The average dose, to the general population of the US, from consumer products as part of man-
made background radiation sources is approximately - ANS 10 mRem/yr
The factor which contributes the greatest variability in dose from natural cosmic background
radiation is - ANS Altitude
Alpha radiation is defined as: - ANS A heavy particle w/ a mass of 4 amu & a charge of +2
that is emitted from the nucleus
Rad - ANS A unit of absorbed dose
Half-life - ANS The length of time required for one-half of the original # of nuclei to
disintegrate
Exposure - ANS The ionization caused by x-ray & gamma radiation in air
Most fission products are unstable because the ratio of - ANS Neutrons to protons is too high
(n:p)
2
Page
@COPYRIGHT @THEBRIGHT 2025/2026
QUESTIONS AND ANSWERS
Atomic Mass - ANS The actual weight of a particular isotope in AMU
The atomic # is the # of: - ANS Protons in the nucleus
The periodic table of the elements lists all known elements in order of: - ANS Increasing
atomic #
An action on an object that could cause the object to change speed or direction is identified as -
ANS Force
The Law of Conservation of Energy states that the: - ANS Total amount of energy in a closed
system remains unchanged
When the nucleons are combined to form a nucleus some of the mass is: - ANS Converted to
binding. energy
The equation E=mc^2 states that: - ANS Mass & energy are equivalent
1
Page
@COPYRIGHT @THEBRIGHT 2025/2026
, When two or more light nuclei combine to from a large nucleus in fusion, this changes the: -
ANS Binding energy
Isotopes are defined as nuclides w/ the same: - ANS # of protons but a different # of
neutrons
The average dose, to the general population of the US, from all combined medical exposures as
part of man-made background radiation sources is approximately - ANS 53 mRem/yr
The average dose, to the general population of the US, from consumer products as part of man-
made background radiation sources is approximately - ANS 10 mRem/yr
The factor which contributes the greatest variability in dose from natural cosmic background
radiation is - ANS Altitude
Alpha radiation is defined as: - ANS A heavy particle w/ a mass of 4 amu & a charge of +2
that is emitted from the nucleus
Rad - ANS A unit of absorbed dose
Half-life - ANS The length of time required for one-half of the original # of nuclei to
disintegrate
Exposure - ANS The ionization caused by x-ray & gamma radiation in air
Most fission products are unstable because the ratio of - ANS Neutrons to protons is too high
(n:p)
2
Page
@COPYRIGHT @THEBRIGHT 2025/2026
