ASNT IRRSP EXAMS SET QUESTIONS AND
ANSWERS SET A+
✔✔open - ✔✔The most common type of installation used in field radiography is
___________
✔✔shielding, time, distance - ✔✔There basically three methods of protection from
ionizing radiation. What are they?
✔✔multiply the survey meters reading by the total exposure time - ✔✔To determine the
total dose received, _______
✔✔multiply the rate of dose by the total time exposed - ✔✔To determine the total dose
received, _______
✔✔multiply exposure time by exposure rate - ✔✔To determine the total dose received,
_______
✔✔60 mR/h - ✔✔At a dose rate of 60 mR/h, one hour of exposure would be
___________
✔✔14 R/Ci at one foot - ✔✔The specific gamma ray constant for Co-60 can be
expressed as _____________
✔✔5.2 R/h/Ci at one foot - ✔✔The specific gamma ray constant for Ir- 192 can be
expressed as _____________
✔✔does rate per curie at a specific distance - ✔✔A specific gamma ray constant can be
stated as ___________
✔✔The intensity is indirectly proportional to the distance squared - ✔✔The inverse
square law is written as
, ✔✔1 half-value layer - ✔✔Shielding can be expressed by the amount of shielding
provided, so that the amount of shielding that would reduce the original exposure rate to
one-half would be stated as
✔✔lead - ✔✔The best material to use as shielding would be
✔✔primary beams have greater penetrability than secondary beams - ✔✔The shorter
the wave legnth or higher the frequency, the greater the penetration; as such
✔✔electrons - ✔✔Elementary particles with a unit negative electrical charge and a
mass approximately equal to 1/1840 that of a proton are
✔✔A number - ✔✔the atomic weight of an atom is the combination of a total number of
protons and neutrons held in the nucleus. This is also known as the
✔✔false - ✔✔Gamma rays are affected by magnetic fields
✔✔False - ✔✔As a radioisotope decays, the elements return to a stable state by
undergoing several steps; once complete, the material continues to produce radiation
✔✔two - ✔✔after 148 days, Ir-192 would have undergone how many half lives?
✔✔Excess neutrons - ✔✔activation is the process of bombarding material with
✔✔protons - ✔✔the total number of ________ identifies an element
✔✔more penetrating - ✔✔Gamma radiation has a shorter wave legnth than visible light,
therefore making it
✔✔Poor equipment design, lack of understanding, lack of and poor safety practices -
✔✔In the early years of radiography, what caused personnel to be over exposed?
✔✔late of 1898 - ✔✔in what year did Marie Curie discover radium?
✔✔Marie and Pierre Curie - ✔✔Who coined the term radioactivity
✔✔3 in. - ✔✔In the early years of radiography, from 1920-1930, the maximum that
could be inspected via X-radiation was ______ steel
✔✔Improper surveys, the source being left in an uncontrolled state, the source not
being locked once retracted to the shielded position - ✔✔the predominant cause of
overexposure is ________
ANSWERS SET A+
✔✔open - ✔✔The most common type of installation used in field radiography is
___________
✔✔shielding, time, distance - ✔✔There basically three methods of protection from
ionizing radiation. What are they?
✔✔multiply the survey meters reading by the total exposure time - ✔✔To determine the
total dose received, _______
✔✔multiply the rate of dose by the total time exposed - ✔✔To determine the total dose
received, _______
✔✔multiply exposure time by exposure rate - ✔✔To determine the total dose received,
_______
✔✔60 mR/h - ✔✔At a dose rate of 60 mR/h, one hour of exposure would be
___________
✔✔14 R/Ci at one foot - ✔✔The specific gamma ray constant for Co-60 can be
expressed as _____________
✔✔5.2 R/h/Ci at one foot - ✔✔The specific gamma ray constant for Ir- 192 can be
expressed as _____________
✔✔does rate per curie at a specific distance - ✔✔A specific gamma ray constant can be
stated as ___________
✔✔The intensity is indirectly proportional to the distance squared - ✔✔The inverse
square law is written as
, ✔✔1 half-value layer - ✔✔Shielding can be expressed by the amount of shielding
provided, so that the amount of shielding that would reduce the original exposure rate to
one-half would be stated as
✔✔lead - ✔✔The best material to use as shielding would be
✔✔primary beams have greater penetrability than secondary beams - ✔✔The shorter
the wave legnth or higher the frequency, the greater the penetration; as such
✔✔electrons - ✔✔Elementary particles with a unit negative electrical charge and a
mass approximately equal to 1/1840 that of a proton are
✔✔A number - ✔✔the atomic weight of an atom is the combination of a total number of
protons and neutrons held in the nucleus. This is also known as the
✔✔false - ✔✔Gamma rays are affected by magnetic fields
✔✔False - ✔✔As a radioisotope decays, the elements return to a stable state by
undergoing several steps; once complete, the material continues to produce radiation
✔✔two - ✔✔after 148 days, Ir-192 would have undergone how many half lives?
✔✔Excess neutrons - ✔✔activation is the process of bombarding material with
✔✔protons - ✔✔the total number of ________ identifies an element
✔✔more penetrating - ✔✔Gamma radiation has a shorter wave legnth than visible light,
therefore making it
✔✔Poor equipment design, lack of understanding, lack of and poor safety practices -
✔✔In the early years of radiography, what caused personnel to be over exposed?
✔✔late of 1898 - ✔✔in what year did Marie Curie discover radium?
✔✔Marie and Pierre Curie - ✔✔Who coined the term radioactivity
✔✔3 in. - ✔✔In the early years of radiography, from 1920-1930, the maximum that
could be inspected via X-radiation was ______ steel
✔✔Improper surveys, the source being left in an uncontrolled state, the source not
being locked once retracted to the shielded position - ✔✔the predominant cause of
overexposure is ________
