Radiographic Safety-UR Flashcards
which measure is based on ionization in air?
roentgen
Radiation protection guides and radiation exposure records are expressed in which dose unit?
Rems
the harmful effects of radiation produced in the cells of living tissue are caused by ……….
ionization
Absorption of large amounts of radiation in a short time is classified as
an acute exposure
what type of exposure should not be included in the determination of an individual’s radiation exposure status?
Medical exposure
an exposure to radiation is permissible only when …….
it is impractical to prevent it
which occupational dose level of radiation should not be exceeded in 1 year?
5 rems
where should yo wear a thermoluminescent dosimeter (TLD)?
between waist and neck on outside of clothing
what is required each time a digital alarm dosimeter (DAD) is used by a different radiographer?
reset the DAD to zero
the approximate operating voltage of an ionization chamber survey meter is __ to ___ _____
50 to 200 volts
What SM-400 full-scale meter sensitivity ranges can be selected?
3mr/hr through 300 mr/hr
which procedure is not a function of the end cap on a SM-400?
(A) Protects the thin mylar window on the chamber from damage
(B) Holds the built-in Th-232 check source used for the operational check
(C) Allows adjustment of the zero adjust switch in an area with low radiation
(D)Prevents alpha, beta, and low energy gamma or X-ray radiation from being detected
C. allows adjustment of the zero adjust switch in an area with low radiation
What form is posted at the entrance to an exposure room?
AFTO Form 9
Which for must be posted inside of an exposure room?
AFTO Form 9E
Which form is used with the rope barrier when x-raying in an unshielded area?
AFTO Form 9
