DANB RHS Question and answers
verified to pass 2025/2026
Storing unexposed radiographic film in high humidity conditions may cause - correct answer ✔Film fog
The shorter the wavelength of electromagnetic radiation, the greater the - correct answer ✔Energy
Which of the following radiograph techniques is recommended for a patient with a shallow palate? -
correct answer ✔Bisecting
Which of the following landmarks are located by the midline of the mandible? - correct answer
✔Genial tubercles
Which of the following should be labeled on the radiographic mount prior to film duplication? - correct
answer ✔Right and left sides
When exposing radiographs, what is the minimum distance the operator should stand from the tube
head? - correct answer ✔6 feet
Which of the following may cause film fogging? - correct answer ✔Using expired film
A panoramic image appears to have a "reverse smile" when the - correct answer ✔Frankfort plane is
angled upward
To assist the patient in controlling the gag reflex, the dental assistant should - correct answer ✔Use a
distraction technique
Somatic effects of radiation do NOT have damaging effects on - correct answer ✔Offspring
,When the tubehead drifts, the first step the dental assistant should take is to - correct answer ✔Stop
using the machine
What is the primary advantage in using digital radiography? - correct answer ✔Reduces the radiation to
patient
The best way to prevent cross-contamination from an exposed film packet is by - correct answer
✔Using individual barrier envelopes
When radiographs are mounted with the embossed dot appearing outward, this is known as - correct
answer ✔Facial mounting
While exposing x-ray films, radiation deflecting off the patient's head is called - correct answer
✔Scatter radiation
Which of the following is a disposable intraoral x-ray film holder device? - correct answer ✔Stabe®
The position-indicating device (PID) shape that most effectively reduces patient exposure to radiation is -
correct answer ✔Rectangular
Which of the following is most likely to cause a stored radiograph to turn brown over time? - correct
answer ✔Underwashing
The annual maximum accumulated dose (MAD) of radiation for dental assistant is based on which of the
following calculations? - correct answer ✔Age minus 18 times 5 rems/year
The amount of radiation and exposure time needed to produce a diagnostic radiograph is best
determined by - correct answer ✔Film speed
, Which of the following can be used to measure excessive occupational exposure? - correct answer
✔Film badge
The endentulous radiographic series may include all of the following EXCEPT - correct answer
✔Bitewings
Emulsion damage to a film is caused by - correct answer ✔Improper handling of the film
When exposing a posterior periapical radiograph on an adult patient with no intraoral restrictions, which
size film should be used? - correct answer ✔2
Dental healthcare personnel who are pregnant can expose radiographs during the - correct answer
✔Entire pregnancy
The median palatal suture is visible on which of the following radiographs? - correct answer ✔Maxillary
anterior periapical
Which of the following is a DISADVANTAGE of panoramic radiographs? - correct answer ✔Higher cost
of equipment
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the
patient - correct answer ✔Not placing the tongue against the palate
Personnel monitoring for radiation exposure is done by - correct answer ✔Wearing a dosimeter
Which of the following is the most effective method of reducing patient exposure to x-radiation? -
correct answer ✔Fast film
verified to pass 2025/2026
Storing unexposed radiographic film in high humidity conditions may cause - correct answer ✔Film fog
The shorter the wavelength of electromagnetic radiation, the greater the - correct answer ✔Energy
Which of the following radiograph techniques is recommended for a patient with a shallow palate? -
correct answer ✔Bisecting
Which of the following landmarks are located by the midline of the mandible? - correct answer
✔Genial tubercles
Which of the following should be labeled on the radiographic mount prior to film duplication? - correct
answer ✔Right and left sides
When exposing radiographs, what is the minimum distance the operator should stand from the tube
head? - correct answer ✔6 feet
Which of the following may cause film fogging? - correct answer ✔Using expired film
A panoramic image appears to have a "reverse smile" when the - correct answer ✔Frankfort plane is
angled upward
To assist the patient in controlling the gag reflex, the dental assistant should - correct answer ✔Use a
distraction technique
Somatic effects of radiation do NOT have damaging effects on - correct answer ✔Offspring
,When the tubehead drifts, the first step the dental assistant should take is to - correct answer ✔Stop
using the machine
What is the primary advantage in using digital radiography? - correct answer ✔Reduces the radiation to
patient
The best way to prevent cross-contamination from an exposed film packet is by - correct answer
✔Using individual barrier envelopes
When radiographs are mounted with the embossed dot appearing outward, this is known as - correct
answer ✔Facial mounting
While exposing x-ray films, radiation deflecting off the patient's head is called - correct answer
✔Scatter radiation
Which of the following is a disposable intraoral x-ray film holder device? - correct answer ✔Stabe®
The position-indicating device (PID) shape that most effectively reduces patient exposure to radiation is -
correct answer ✔Rectangular
Which of the following is most likely to cause a stored radiograph to turn brown over time? - correct
answer ✔Underwashing
The annual maximum accumulated dose (MAD) of radiation for dental assistant is based on which of the
following calculations? - correct answer ✔Age minus 18 times 5 rems/year
The amount of radiation and exposure time needed to produce a diagnostic radiograph is best
determined by - correct answer ✔Film speed
, Which of the following can be used to measure excessive occupational exposure? - correct answer
✔Film badge
The endentulous radiographic series may include all of the following EXCEPT - correct answer
✔Bitewings
Emulsion damage to a film is caused by - correct answer ✔Improper handling of the film
When exposing a posterior periapical radiograph on an adult patient with no intraoral restrictions, which
size film should be used? - correct answer ✔2
Dental healthcare personnel who are pregnant can expose radiographs during the - correct answer
✔Entire pregnancy
The median palatal suture is visible on which of the following radiographs? - correct answer ✔Maxillary
anterior periapical
Which of the following is a DISADVANTAGE of panoramic radiographs? - correct answer ✔Higher cost
of equipment
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the
patient - correct answer ✔Not placing the tongue against the palate
Personnel monitoring for radiation exposure is done by - correct answer ✔Wearing a dosimeter
Which of the following is the most effective method of reducing patient exposure to x-radiation? -
correct answer ✔Fast film
