DOE Core (RCT) Practice Exam Questions and Answers | Updated 2026 | Guaranteed Pass

DOE Core (RCT) Practice Exam Questions and Answers | Updated 2026 | Guaranteed Pass Atomic Mass - answer-The actual weight of a particular isotope in AMU The atomic # is the # of: - answer-Protons in the nucleus The periodic table of the elements lists all known elements in order of: - answer-Increasing atomic # An action on an object that could cause the object to change speed or direction is identified as - answerForce The Law of Conservation of Energy states that the: - answer-Total amount of energy in a closed system remains unchanged When the nucleons are combined to form a nucleus some of the mass is: - answer-Converted to binding. energy The equation E=mc^2 states that: - answer-Mass & energy are equivalent When two or more light nuclei combine to from a large nucleus in fusion, this changes the: - answerBinding energy Isotopes are defined as nuclides w/ the same: - answer-# 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 - answer-53 mRem/yrThe average dose, to the general population of the US, from consumer products as part of man-made background radiation sources is approximately - answer-10 mRem/yr The factor which contributes the greatest variability in dose from natural cosmic background radiation is - answer-Altitude Alpha radiation is defined as: - answer-A heavy particle w/ a mass of 4 amu & a charge of +2 that is emitted from the nucleus Rad - answer-A unit of absorbed dose Half-life - answer-The length of time required for one-half of the original # of nuclei to disintegrate Exposure - answer-The ionization caused by x-ray & gamma radiation in air Most fission products are unstable because the ratio of - answer-Neutrons to protons is too high (n:p) Curie - answer-The activity of that quantity of radioactive material in which 37 billion atoms are transformed per second The rate of decay & the type & energy of decay are unique for - answer-Each radionuclide If a nuclide is found to be radioactive, & has not been involved w/ a man-made process, the nuclide is _____ radioactive - answer-Naturally Identify one aspect associated w/ radioactive decay which most identifies a radionuclide - answer-Rate of decay Alpha particle - answer-A heavy particulate radiation consisting of 2 protons & 2 neutrons & a charge of +2A beta particle transfers energy to the matter through which it is passing. The beta particle causes an electron to be raised from one orbit to a higher energy state within the atom. The atom remain neutrally charged. This is an example of: - answer-The excitation mechanism of energy transfer An alpha particle interacts w/ the atoms of the matter through which it is passing & transfers energy to it. These electron field interactions can remove an electron from an orbit of a neutral atom, forming charged particles by the passage of radiation through the media. This is an example of: - answer-The ionization mechanism of energy transfer Which of the following is a direct result of a neutron capture? - answer-Elastic scattering Pair production - answer-The process where a photon interacts w/ the field of the nucleus, converting the photon energy into an electron-positron set What is the minimum photon energy required for the pair production interaction to occur? - answer- 1.02 MeV All but one of the following is a mechanism of energy transfer for beta particles. The exception is: - answer-Compton scattering Which of the following cells are the most radioresistant - answer-Bone A threshold dose may exist for ____ effect - answer-Non-stochastic An example of a stochastic effect is - answer-Cancer The Law of Bergonie & Tribondeau states that the radiosenstivity of tissue is ____ proportional to its reproductive capacity - answer-Directly Which agency was given legal authority in 1946 to regulate safety of both its workers & its contract workers according to recommendations of then-current experts? - answer-Atomic Energy Commission (AEC)