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NBDHE EXAM 2024/2025 WITH 100% ACCURATE SOLUTIONS
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NBDHE EXAM 2024/2025 WITH 100% ACCURATE SOLUTIONS
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NBDHE EXAM 2024/2025 WITH 100%ACCURATE SOLUTIONS
The x-ray was discovered by
a. Heinrich Geissler
b. Wilhelm Roentgen
c. Johann Hittorf
d. William Crookes - Precise Answer ✔✔Wilhelm Roentgen
Which discovery was the precursor to the discovery of x-rays?
A. Beta particles
B. Alpha particles
C. Cathode rays
D. Radioactive materials - Precise Answer ✔✔Cathode rays
Which term describes two or more atoms that are joined by a chemical
bond?
a. ion
b. ion pair
c. molecule
d. proton - Precise Answer ✔✔Molecule
,Which is not a type of particulate radiation?
A. Alpha particles
B. Beta particles
C. Protons
D. Nucleons - Precise Answer ✔✔Nucleons
Which is the location where x-rays are produced?
A. Positive cathode
B. Positive anode
C. Negative cathode
D. Negative anode - Precise Answer ✔✔Positive anode
Which describes scatter radiation?
A. Radiation that exits the tubehead
B. Radiation that is more penetrating than primary radiation
C. Radiation that has been deflected from its path by interaction with
matter
D. none of the above - Precise Answer ✔✔Radiation that has been
deflected from its path by interaction with matter
In dental imaging, the quality of the x ray beam is controlled by?
a. kilovoltage
b. miliamperage
c. exposure time
,d. source-to-receptor distance - Precise Answer ✔✔Kilovoltage
Increasing milliamperage results in an increase in:
A. Temperature of filament
B. Mean energy of beam
C. Number of x-rays produced
D. Both A & C - Precise Answer ✔✔Temperature of filament and
number of x-rays produced
The overall blackness or darkness of an image is termed
a. contrast
b. density
c. overexposure
d. polychromatic - Precise Answer ✔✔Density
If the target receptor distance is doubled, the resultant beam will be
a. four times as intense
b. twice as intense
c. half as intense
d. one fourth as intense - Precise Answer ✔✔One fourth as intense
The latent period in radiation biology is the time between
a. initial injury and repair
, b. subsequent doses of radiation
c. cell rest and cell mitosis
d. exposure to x-radiation and clinical symptoms - Precise Answer
✔✔Exposure to x radiation and clinical symptoms
Which factor(s) contributes to radiation injury?
A. Total dose
B. Dose rate
C. Cell sensitivity
D. Age
E. All of the above - Precise Answer ✔✔All of the above
The traditional unit for measuring x-ray exposure in air is termed
a. gray
b. coulombs per kilogram
c. rem
d. rad
e. roentgen - Precise Answer ✔✔Roentgen
Which is considered radioresistant?
A. Immature reproductive cells
B. Young bone cells
C. Mature bone cells
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