40-hour radiation safety exam 2024 with
Correct Solutions
The symbol R means - Answer -roentgen
the acronym rad means - Answer -radiation absorbed dose
the roentgen (R) exposure is measured in - Answer -air
the symbol mR means - Answer -milliroentgen
one roentgen or 1 R is equal to - Answer -1000 milliroentgen
the acronym rem stands for - Answer -roentgen equivalent man
the initialism QF stands for - Answer -quality factor
the quality factor for X-rays and gamma rays is - Answer -1
the quality factor for alpha (ray) particles is - Answer -20
activity of radioactive material is measured in - Answer -curies
Becquerels and curies are units of measurement of - Answer -decay rate
atoms that have excess energy and are unstable are known as - Answer -radioactive
elementary particle units with a negative electrical charge and a mass approximately equal to 1/1840
that of a proton are - Answer -electrons
positively charged elementary particles with a mass approximately equal to 1840 times that of an
electron, or 1 AMU, are known as - Answer -protons
unchanged elementary particles with a mass nearly equal that of a proton are called - Answer -neutrons
the area known as the center of an atom is called the - Answer -nucleus
any byproduct material that is encased in a capsule designed to prevent leakage or escape of the
byproducts material is - Answer -sealed source
a tube through which the radioactive source travels when inside a radiographic exposure device is a -
Answer -S tube
survey meters must be calibrated at intervals not to exceed: - Answer -six months and/or after
instrument servicing except for batter changes
, a survey meter must be capable of measuring a range of - Answer -2 to 1000 mR/h (0.02 to 10 mSv/h)
becquerels and curies are units of measurement of - Answer -activity
an analog survey meter must be calibrated on each scale at two points approximately - Answer -33% and
66% on the scale's potential
the process that results in the removal of orbital electrons from atoms resulting in the formation of ion
pairs is - Answer -ionization
the fact that gasses bombarded by ionizing radiation become conductors of electrical current make them
useful in - Answer -detection equipment
a dosimeter must be capable of reading a range of - Answer -0-200 mR (0-2mSv)
pocket ion chambers must be capable of reading - Answer -200 mR (2mSv)
an exposure rate is measured by - Answer -survey meter
what dosimeters (dosimetric devices) are last affected by moisture - Answer -TLDs
full deflection of a survey meter while on batter check means - Answer -meter may or may not be
working properly
dosimeters must be calibrated at intervals not to exceed - Answer -annually
rate alarms must be calibrated at intervals not to exceed - Answer -yearly
a film badge/TLD records what - Answer -total dose history for the period worn
when performing radiography in a permanent radiographic installation equipped with an area monitor,
the technician is not required to - Answer -wear a rate alarm
a direct reading ionization chamber, such as a dosimeter, has the advantage of providing an - Answer -
immediate dose history since last time charged
a radiographers survey meter is sowing 0 near the source; it can safely be assumed that: - Answer -the
meter is in an inoperable state, the radiographer should retreat from the source until an operational
meter has replaced the suspect meter
a radiographer reads 7.5 on the 10x scale of the survey meter. what is the current dose rate at that
position - Answer -75 mR/h
after 6 half-value layers, what percentage of radiation would be received - Answer -1.6%
assuming a source has a half-life of 20 years, how old would the source be in 3 half-lives - Answer -60
years
Correct Solutions
The symbol R means - Answer -roentgen
the acronym rad means - Answer -radiation absorbed dose
the roentgen (R) exposure is measured in - Answer -air
the symbol mR means - Answer -milliroentgen
one roentgen or 1 R is equal to - Answer -1000 milliroentgen
the acronym rem stands for - Answer -roentgen equivalent man
the initialism QF stands for - Answer -quality factor
the quality factor for X-rays and gamma rays is - Answer -1
the quality factor for alpha (ray) particles is - Answer -20
activity of radioactive material is measured in - Answer -curies
Becquerels and curies are units of measurement of - Answer -decay rate
atoms that have excess energy and are unstable are known as - Answer -radioactive
elementary particle units with a negative electrical charge and a mass approximately equal to 1/1840
that of a proton are - Answer -electrons
positively charged elementary particles with a mass approximately equal to 1840 times that of an
electron, or 1 AMU, are known as - Answer -protons
unchanged elementary particles with a mass nearly equal that of a proton are called - Answer -neutrons
the area known as the center of an atom is called the - Answer -nucleus
any byproduct material that is encased in a capsule designed to prevent leakage or escape of the
byproducts material is - Answer -sealed source
a tube through which the radioactive source travels when inside a radiographic exposure device is a -
Answer -S tube
survey meters must be calibrated at intervals not to exceed: - Answer -six months and/or after
instrument servicing except for batter changes
, a survey meter must be capable of measuring a range of - Answer -2 to 1000 mR/h (0.02 to 10 mSv/h)
becquerels and curies are units of measurement of - Answer -activity
an analog survey meter must be calibrated on each scale at two points approximately - Answer -33% and
66% on the scale's potential
the process that results in the removal of orbital electrons from atoms resulting in the formation of ion
pairs is - Answer -ionization
the fact that gasses bombarded by ionizing radiation become conductors of electrical current make them
useful in - Answer -detection equipment
a dosimeter must be capable of reading a range of - Answer -0-200 mR (0-2mSv)
pocket ion chambers must be capable of reading - Answer -200 mR (2mSv)
an exposure rate is measured by - Answer -survey meter
what dosimeters (dosimetric devices) are last affected by moisture - Answer -TLDs
full deflection of a survey meter while on batter check means - Answer -meter may or may not be
working properly
dosimeters must be calibrated at intervals not to exceed - Answer -annually
rate alarms must be calibrated at intervals not to exceed - Answer -yearly
a film badge/TLD records what - Answer -total dose history for the period worn
when performing radiography in a permanent radiographic installation equipped with an area monitor,
the technician is not required to - Answer -wear a rate alarm
a direct reading ionization chamber, such as a dosimeter, has the advantage of providing an - Answer -
immediate dose history since last time charged
a radiographers survey meter is sowing 0 near the source; it can safely be assumed that: - Answer -the
meter is in an inoperable state, the radiographer should retreat from the source until an operational
meter has replaced the suspect meter
a radiographer reads 7.5 on the 10x scale of the survey meter. what is the current dose rate at that
position - Answer -75 mR/h
after 6 half-value layers, what percentage of radiation would be received - Answer -1.6%
assuming a source has a half-life of 20 years, how old would the source be in 3 half-lives - Answer -60
years
