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NBDHE Practice Questions with correct answers
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NBDHE Practice Questions with correct answers
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NBDHE Practice Questions with correctanswers
The |x-ray |was |discovered |by
a. |Heinrich |Geissler
b. |Wilhelm |Roentgen
c. |Johann |Hittorf
d. |William |Crookes |- |ANSWERS✔✔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 |- |ANSWERS✔✔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 |- |ANSWERS✔✔Molecule
Which |is |not |a |type |of |particulate |radiation?
A. |Alpha |particles
B. |Beta |particles
C. |Protons
,D. |Nucleons |- |ANSWERS✔✔Nucleons
Which |is |the |location |where |x-rays |are |produced?
A. |Positive |cathode
B. |Positive |anode
C. |Negative |cathode
D. |Negative |anode |- |ANSWERS✔✔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 |- |ANSWERS✔✔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 |- |ANSWERS✔✔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 |- |ANSWERS✔✔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 |- |ANSWERS✔✔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 |- |ANSWERS✔✔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 |- |ANSWERS✔✔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 |- |ANSWERS✔✔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 |- |ANSWERS✔✔Roentgen
Which |is |considered |radioresistant?
A. |Immature |reproductive |cells
B. |Young |bone |cells
C. |Mature |bone |cells
D. |Epithelial |cells
E. |None |of |the |above |- |ANSWERS✔✔Mature |bone |cells
Which |position |indicating |device |is |most |effective |in |reducing |patient |exposure?
A. |Conical
B. |Rectangular
C. |Circular
D. |all |are |equally |effective |in |reducing |patient |exposure |- |ANSWERS✔✔Rectangular
Which |statement |describes |the |function |of |a |filter |in |a |dental |x-ray |tube |head?
A. |It |reduces |the |size |and |shape |of |the |beam
B. |It |removes |low |energy |x |rays
C. |It |removes |the |dose |of |radiation |to |the |thyroid |gland
D. |It |decreases |the |mean |energy |of |the |beam |- |ANSWERS✔✔It |removes |low |energy |x |rays
The |dental |radiographer |can |regulate |the |x |ray |beam |(kVp, |mA, |time) |through |the |use |of |the
a. |control |panel
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