40 hour radiation safety
elementary particle units with a negative electrical charge and a mass approximately equal to 1/1840 that of a proton are - CORRECT ANSWER -electrons
positively charged elementary particles with a mass approximately equal to 1840 times that of an electron, or 1 AMU, are known as - CORRECT ANSWER -protons
unchanged elementary particles with a mass nearly equal that of a proton are called - CORRECT ANSWER -neutrons
the area known as the center of an atom is called the - CORRECT ANSWER -nucleus
any byproduct material that is encased in a capsule designed to prevent leakage or escape of the byproducts material is - CORRECT ANSWER -sealed source
a tube through which the radioactive source travels when inside a radiographic exposure device is a - CORRECT ANSWER -S tube
The symbol R means - CORRECT ANSWER -roentgen
the acronym rad means - CORRECT ANSWER -radiation absorbed dose
the roentgen (R) exposure is measured in - CORRECT ANSWER -air
the symbol mR means - CORRECT ANSWER -milliroentgen
one roentgen or 1 R is equal to - CORRECT ANSWER -1000 milliroentgen
the acronym rem stands for - CORRECT ANSWER -roentgen equivalent man
the initialism QF stands for - CORRECT ANSWER -quality factor
the quality factor for X-rays and gamma rays is - CORRECT ANSWER -1
the quality factor for alpha (ray) particles is - CORRECT ANSWER -20
activity of radioactive material is measured in - CORRECT ANSWER -curies
Becquerels and curies are units of measurement of - CORRECT ANSWER -decay rate
atoms that have excess energy and are unstable are known as - CORRECT ANSWER - radioactive
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survey meters must be calibrated at intervals not to exceed: - CORRECT ANSWER -six months and/or after instrument servicing except for batter changes
a survey meter must be capable of measuring a range of - CORRECT ANSWER -2 to 1000 mR/h (0.02 to 10 mSv/h)
becquerels and curies are units of measurement of - CORRECT ANSWER -activity
an analog survey meter must be calibrated on each scale at two points approximately - CORRECT 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 - CORRECT ANSWER -ionization
the fact that gasses bombarded by ionizing radiation become conductors of electrical current make them useful in - CORRECT ANSWER -detection equipment
a dosimeter must be capable of reading a range of - CORRECT ANSWER -0-200 mR (0-2mSv)
pocket ion chambers must be capable of reading - CORRECT ANSWER -200 mR (2mSv)
an exposure rate is measured by - CORRECT ANSWER -survey meter
what dosimeters (dosimetric devices) are last affected by moisture - CORRECT ANSWER-TLDs
full deflection of a survey meter while on batter check means - CORRECT ANSWER - meter may or may not be working properly
dosimeters must be calibrated at intervals not to exceed - CORRECT ANSWER - annually
rate alarms must be calibrated at intervals not to exceed - CORRECT ANSWER -yearly
a film badge/TLD records what - CORRECT 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 - CORRECT ANSWER -wear a rate alarm
a direct reading ionization chamber, such as a dosimeter, has the advantage of providing an - CORRECT ANSWER -immediate dose history since last time charged
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