IRRSP EXAMINATION TEST 2026 FULL
SOLUTION QUESTIONS AND ANSWERS
GRADED A+
●● Atoms having the same number or protons but a different number on
neutrons in the nuclei. Atoms with the same atomic number (the same
chemical element) but different atomic weights.
Answer: Isotope
●● Any source that disrupts the electrical balance of an atom and results
in the production of ions.
Answer: Ionization
●● The radation dose or amount of radation that has been absorbed by a
substance. Measured in rads (greys).
Answer: Absorbed dose
●● The process whereby the particles or photons in a beam of radation
are reduced in number or energy as they pass through a medium.
Answer: Absorption
,●● The activity of a radioisotope is the number of disintegrations that
occur for a given quantity of the radioisotope during a given length of
time. Activity is measured in curies (becquerel)
Answer: Activity
●● The acronym for (As Low As Reasonably Achievable) which means
making every effort to maintain and control exposures as far below the
dose limits as in practical. This consept comes out of the Code of
Federal Regulation 10 CFR Part 20.
Answer: ALARA
●● A small electronic device, required to be worn by a radiographer,
with an audible alarm set to trigger at 500 mR/h (5000 uSv/h).
Answer: Alarming rate meter
●● A positive electrically chargerd particle of radation consisting of 2
protrons and 2 newtrons (same as helium nucleus). It is emitted from the
nucleus of many radioactive materials during radioactive decay. ( +
charge)
Answer: Alpha particle
●● An electrically charged particle of radation emitted from the nucleus
of many radioactive materials during radioactive decay. A beta particle is
a fast-moving electron, sometimes moving close to the speed of light.
( - charge)
, Answer: Beta particles
●● High energy, short wavelenghth electromagnetic radation emitted
during radioactive decay.
Answer: Gamma rays
●● The reduction in the intensity of radation as it passes through a
material.
Answer: Attenuation
●● A unit if matter consisting of a nucleus (made up of neutrons and
protons) and electrons that surround the nucleus. The smallest part of an
atom that retains the properties of the element.
Answer: Atom
●● The mass/weight of an atom, usually expressed in atomic mass units
(AMU).
Answer: Atomic mass
●● This unit is based on 1/16 of the weight of an oxygen-16 atom. One
neutron or one proton weighs approximately 1 AMU.
Answer: Atomic mass units
SOLUTION QUESTIONS AND ANSWERS
GRADED A+
●● Atoms having the same number or protons but a different number on
neutrons in the nuclei. Atoms with the same atomic number (the same
chemical element) but different atomic weights.
Answer: Isotope
●● Any source that disrupts the electrical balance of an atom and results
in the production of ions.
Answer: Ionization
●● The radation dose or amount of radation that has been absorbed by a
substance. Measured in rads (greys).
Answer: Absorbed dose
●● The process whereby the particles or photons in a beam of radation
are reduced in number or energy as they pass through a medium.
Answer: Absorption
,●● The activity of a radioisotope is the number of disintegrations that
occur for a given quantity of the radioisotope during a given length of
time. Activity is measured in curies (becquerel)
Answer: Activity
●● The acronym for (As Low As Reasonably Achievable) which means
making every effort to maintain and control exposures as far below the
dose limits as in practical. This consept comes out of the Code of
Federal Regulation 10 CFR Part 20.
Answer: ALARA
●● A small electronic device, required to be worn by a radiographer,
with an audible alarm set to trigger at 500 mR/h (5000 uSv/h).
Answer: Alarming rate meter
●● A positive electrically chargerd particle of radation consisting of 2
protrons and 2 newtrons (same as helium nucleus). It is emitted from the
nucleus of many radioactive materials during radioactive decay. ( +
charge)
Answer: Alpha particle
●● An electrically charged particle of radation emitted from the nucleus
of many radioactive materials during radioactive decay. A beta particle is
a fast-moving electron, sometimes moving close to the speed of light.
( - charge)
, Answer: Beta particles
●● High energy, short wavelenghth electromagnetic radation emitted
during radioactive decay.
Answer: Gamma rays
●● The reduction in the intensity of radation as it passes through a
material.
Answer: Attenuation
●● A unit if matter consisting of a nucleus (made up of neutrons and
protons) and electrons that surround the nucleus. The smallest part of an
atom that retains the properties of the element.
Answer: Atom
●● The mass/weight of an atom, usually expressed in atomic mass units
(AMU).
Answer: Atomic mass
●● This unit is based on 1/16 of the weight of an oxygen-16 atom. One
neutron or one proton weighs approximately 1 AMU.
Answer: Atomic mass units
