ASNT Study Guide - Industrial Radiography Radiation Safety
Becquerels and curies are units of measurement of:
- physical size of the source
- gray per hour
- decay rate
- roentgen per hour - CORRECT ANSWER -c. decay rate
Atoms that have excess energy and are unstable are known as:
- radioactive
- radioactivity
- balanced
- weighted - CORRECT ANSWER -a. radioactive
Elementary particles units with a negative electrical charge and a mass approximately
equal to 1/1840 that of a proton are:
- electrons
- protons
- neutrons
- valence shells - CORRECT ANSWER -a. electrons
Positively charged elementary particles with a mass approximately equal to 1840 times
that of an electron, or 1 AMU, are known as:
- electrons
- protons
- neutrons
- valence shells - CORRECT ANSWER -b. protons
Uncharged elementary particles with a mass nearly equal to that of a proton are called:
- electrons
- protons
- neutrons
- valence shells - CORRECT ANSWER -c. neutrons
The area known as the center of an atom is called the:
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- electron
- nucleus
- proton
- neutron - CORRECT ANSWER -b. nucleus
Any byproduct material that is encased in a capsule designed to prevent leakage or
escape of the byproduct material is a:
- drum
- pig
- sealed source
- container - CORRECT ANSWER -c. sealed source
A tube through which the radioactive source travels when inside a radiographic
exposure device is a/an:
- port tube
- guide tube
- S tube
- exit tube - CORRECT ANSWER -c. S tube
Survey meters must be calibrated at intervals not to exceed:
- three months and/or after instrument servicing except for battery changes
- six months and/or after instrument servicing except for battery changes
- annually and after instrument servicing except for battery changes
- daily and after instrument servicing except for battery changes - CORRECT
ANSWER-b. six months and/or after instrument servicing except for battery changes
A survey meter must be capable of measuring a range of:
- 0 to 1000 mR/h (0 to 10 mSv/h)
- 2 to 1000 R/h (0.02 to 10 Sv/h)
- 0 to 1000 R/h (0 to 10 Sv/h)
- 2 to 1000 mR/h (0.02 to 10 mSv/h) - CORRECT ANSWER -d. 2 to 1000 mR/h (0.02 to
10 mSv/h)
Becquerels and curies are units of measurement of:
- physical size of the source
- activity
- gray per hour
- roentgen per hour - CORRECT ANSWER -b. activity
An analog survey meter must be calibrated on each scale at two points approximately:
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- 33% and 66% of the scale's potential
- 25% and 75% of the scale's potential
- through the full range of the scale's potential
- at the midpoint of the scale's potential - CORRECT ANSWER -a. 33% and 66% of the
scale's potential
The process that results in the removal of orbital electrons from atoms resulting in the
formation of ion pairs is called:
- excitation
- radioactivity
- decay
- ionization - CORRECT ANSWER -d. ionization
The fact that gases bombarded by ionizing radiation become conductors of electrical
current make them useful in:
- X-ray transformers
- cathode tubes
- detection equipment
- gasses cannot conduct electrical charges - CORRECT ANSWER -c. detection
equipment
A dosimeter must be capable of reading a range of:
- 0-100 mR (0-1 mSv)
- 0-200 mR (0-2 mSv)
- 0-500 mR (0-5 mSv)
- 0-1 R (0-10 mSv) - CORRECT ANSWER -b. 0-200 mR (0-2 mSv)
Pocket ion chambers must be capable of reading:
- 100 mR (1 mSv)
- 500 mR (5 mSv)
- 200 mR (2 mSv)
- 999 mR (9.99 mSv) - CORRECT ANSWER -c. 200 mR (2 mSv)
An exposure rate is measured by:
- survey meter
- a dosimeter
- rate alarm
- TLD/film badge - CORRECT ANSWER -a. survey meter
What dosimeters (dosimetric devices) are least affected by moisture?
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- digital dosimeters
- film badges
- TLDs
- ion chambers - CORRECT ANSWER -c. TLDs
Full deflection of a survey meter while on battery check means:
- meter is working properly and has good batteries
- meter may or may not be working properly
- meter is working properly and battery strength is not an issue
- meter is unusable - CORRECT ANSWER -b. meter may or may not be working
properly
Dosimeters must be calibrated at intervals not to exceed:
- three months
- six months
- biannually
- annually - CORRECT ANSWER -d. annually
Rate alarms must be calibrated at intervals not to exceed:
- yearly
- quarterly
- monthly
- biannually - CORRECT ANSWER -a. yearly
A film badge/TLD records what?
- dose rate
- exposure rate
- total dose history for the period worn
- daily dose - CORRECT ANSWER -c. 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:
- use a survey meter
- wear a film badge or TLD
- wear a rate alarm
- wear a dosimeter - CORRECT ANSWER -c. wear a rate alarm
A direct reading ionization chamber, such as a dosimeter, has the advantage of
providing an:
- accurate dose history for the month
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