Exam (elaborations)
DANB MOCK TEST QUESTIONS AND ANSWERS 2024
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Exam of 8 pages for the course DANB at DANB (DANB MOCK TEST)
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DANB MOCK TESTThe dentist says that the image has too much contrast; she would like to see more gray
values. What adjustment would you make? - answer Increase kVp.
All of the following are true statements about film badges except:
a. they should be worn at work only.
b. if an assistant follows all safety precautions; exposure should be near zero.
c. they should be worn when any form of x-ray is taken.
d. the badge is usually worn for 3 to 4 weeks before returning it for reading. – answer c.
they should be worn when any form of x-ray is taken.
Each of the following is true about digitizing film-based radiographic images except:
a. it duplicates with slightly less detail than the original film.
b. desktop scanners capture the light signal.
c. the process is similar to other film duplication.
d. digitized film-based images cannot be enhanced by computer software - answerd.
digitized film-based images cannot be enhanced by computer software
The penetrating power of the x-ray beam is controlled by the settings on the: -
answerkilovoltage setting.
All of the following organs are more sensitive to radiation and are considered critical
organs except:
a. skin.
b. thyroid gland.
c. muscle.
d. lens of the eye. - answerc. muscle
The maximum permissible dose for an occupational worker for an individual 18 years of
age or older is _____ rem/year. - answer5 rem/year
Which of the following terms is used to describe the energy or penetrating ability of the
x-ray beam in dental radiography?
a. Quantity
b. Quality
c. Collimation
d. Density - answerb. Quality
Which of the following is the name for the primary kind of radiation produced in the
dental x-ray tubehead?
a. Braking radiation
, b. Characteristic radiation
c. Particulate radiation
d. Electromagnetic radiation - answera. braking radiation
Which of the following statements is true concerning the structure of the atom?
a. Electrons have no weight or mass.
b. The orbital path of an electron around the nucleus is called an electron shell.
c. Electrons are unstable in their orbits and shift freely.
d. The nucleus contains protons and electrons. - answerb. The orbital path of an
electron around the nucleus is called an electron shell.
Jimmy wants to know why you want to put the heavy "blanket" (lead apron) on him
before taking his "pictures." You explain that: - answer"It works to protect him from
scatter radiation."
The heart of the x-ray generating system is the: - answerx-ray tube
Positioning instruments in digital radiography: - answerAssist in film placement and
keep the patient's fingers from being exposed
The recommended distance between the safelight and where the films are unwrapped
is: - answer4 feet
Chronic radiation exposure occurs when _____ doses of radiation are received over a
_______ time period. - answersmall, long
After the last image is obtained the dental assistiant removes their treamtment golves.
After removing gloves, the dental assistant should: - answerremove the lead apron from
the patient
The uses of dental images include the detection of: - answerabnormalities in
surrounding hard and soft tissues
A plastic or metal film cassette holds and protects the extraoral film. During exposure,
the side of the cassette must face the patient is the _____ side - answerfront
An example of cumulative radiation exposure is: - answercancer
An exposure time of 1/4 second is equal to _____ impulse(s). - answer15
Which of the following statements about duplicating film is not correct?
a. The emulsion side of the film appears shiny.
b. Duplicating film is exposed by visible white light.
c. Duplicating film is not intended to be used intraorally.
d. The emulsion is only on one side. - answera. The emulsion side of the film appears
shiny.
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