RADIATION SAFETY FINAL TEST
QUESTIONS WITH COMPLETE
SOLUTIONS
Who discovered X-rays? - Answer-Wilhem Conrad Roentgen
Describe the wavelengths of dental radiographs:
A. __________ wavelengths (short or long)
B. ___________ frequency (high or low)
C. ___________ energy (high or low)
D. ___________ penetrating power (high or low) - Answer-A. Short wavelengths
B. High frequency
C. High energy
D. High penetrating power
Describe the four types or radiation: - Answer-1. Primary: a central beam is emitted,
produces diagnostic image. High energy, short wavelength traveling in straight line.
2. Secondary: when primary x-rays strike patient or any matter. Waves can be
transformed into longer wavelengths that lose energy.
3. Scatter: deflected from the path as it strikes a substance, scattering in all directions
and presents the most danger to operator.
4. Leakage: radiation escapes in all directions from the tube or head.
What tissues are radio sensitive that need protecting when taking radiographs? -
Answer-Lens of the eye, thyroid gland, reproductive organs
What are the intraoral film sizes and what are their uses? - Answer-No. 0- child
No. 1- narrow anterior film
No. 2- adult film
No. 3- long bitewing
No. 4- occlusal film
Describe the two basic techniques used for film exposures in dentistry: - Answer-1.
Bisecting angle
2. Parallel technique
What are the three types of intraoral film exposures? - Answer-PA (periapical), BW
(bitewing), Occlusal
Name the 7 characteristics of a quality x-ray: - Answer-1. Proper teeth and surrounding
area on film
2. Dimensionally accurate
3. Contacts between teeth open
QUESTIONS WITH COMPLETE
SOLUTIONS
Who discovered X-rays? - Answer-Wilhem Conrad Roentgen
Describe the wavelengths of dental radiographs:
A. __________ wavelengths (short or long)
B. ___________ frequency (high or low)
C. ___________ energy (high or low)
D. ___________ penetrating power (high or low) - Answer-A. Short wavelengths
B. High frequency
C. High energy
D. High penetrating power
Describe the four types or radiation: - Answer-1. Primary: a central beam is emitted,
produces diagnostic image. High energy, short wavelength traveling in straight line.
2. Secondary: when primary x-rays strike patient or any matter. Waves can be
transformed into longer wavelengths that lose energy.
3. Scatter: deflected from the path as it strikes a substance, scattering in all directions
and presents the most danger to operator.
4. Leakage: radiation escapes in all directions from the tube or head.
What tissues are radio sensitive that need protecting when taking radiographs? -
Answer-Lens of the eye, thyroid gland, reproductive organs
What are the intraoral film sizes and what are their uses? - Answer-No. 0- child
No. 1- narrow anterior film
No. 2- adult film
No. 3- long bitewing
No. 4- occlusal film
Describe the two basic techniques used for film exposures in dentistry: - Answer-1.
Bisecting angle
2. Parallel technique
What are the three types of intraoral film exposures? - Answer-PA (periapical), BW
(bitewing), Occlusal
Name the 7 characteristics of a quality x-ray: - Answer-1. Proper teeth and surrounding
area on film
2. Dimensionally accurate
3. Contacts between teeth open
