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BU Dental Radiology final test 2026
Latest Questions and Answers (100%
Expert Answers) A+
What does the x-ray tube contain? [ Ans: ] cathode anode and focusing
cup
Who discovered what x-rays were? [ Ans: ] Wilhelm Conrad Roentgen
In a dental x-ray tube the electrons are emitted from the what? [ Ans: ]
Cathode
X-ray is produced when electrons moving at a high speed hit the tugstnen
target in a x-ray tube. T or F [ Ans: ] True
an assistant may hold the film or sensor in place for the pt during
exposure [ Ans: ] False
© 2026
As soon as a film or sensor is placed in a pt's mouth it is considered
contaminated? [ Ans: ] True
X-rays are ionizing radiation. [ Ans: ] True
Bitewings show what? [ Ans: ] Crowns and permant fixtures are
interporximal surfaces of the teeth.
In the paralleling technique the xray is directed perpendicular to the
bisecting line between the angle of the long axis of the tooth and the
film/sensor [ Ans: ] True, explain.. So when you are parallelling, the angle
you make when you are bisecting is perpendicular to the angle
Pt;s should be drapped with a led apron prior to any radiographic
images? [ Ans: ] True
Which if not a safety precaution for taking x-rays?
, 2
-Always stand behind an appropriate barrier?
-Never stand in the path of primary radiation
-Never stabilize the tube head during radiation
-If neccessary hold the film in the pt's mouth [ Ans: ] If neccessary hold
the film in the pt's mouth, never hold the film or sensor in the pts mouth.
X-rays travel at the speed of light? [ Ans: ] True
Nerve cells can be regennerated? [ Ans: ] False, No- Dense things like
bone can and perm fixtures, restorations.
Which of these have an infulence on radiation protection?
-Safe equipment
© 2026
-Skilled operator
-Lead aprons and thyroid collars
-All of the above [ Ans: ] All of the above
Filters in an x-ray tube is made of what? [ Ans: ] Aluminum
The radiographs which reveal the entire teeth with the apical region is
called what? [ Ans: ] Periapical
X-ray instruments should always be what? [ Ans: ] Sterlized
Tree-like lightening black streaks on a processed film are caused by
what? [ Ans: ] Static electricity when drying
During pregancy a partiant may be irradiated by taking necessary
precations? True or False [ Ans: ] True
BU Dental Radiology final test 2026
Latest Questions and Answers (100%
Expert Answers) A+
What does the x-ray tube contain? [ Ans: ] cathode anode and focusing
cup
Who discovered what x-rays were? [ Ans: ] Wilhelm Conrad Roentgen
In a dental x-ray tube the electrons are emitted from the what? [ Ans: ]
Cathode
X-ray is produced when electrons moving at a high speed hit the tugstnen
target in a x-ray tube. T or F [ Ans: ] True
an assistant may hold the film or sensor in place for the pt during
exposure [ Ans: ] False
© 2026
As soon as a film or sensor is placed in a pt's mouth it is considered
contaminated? [ Ans: ] True
X-rays are ionizing radiation. [ Ans: ] True
Bitewings show what? [ Ans: ] Crowns and permant fixtures are
interporximal surfaces of the teeth.
In the paralleling technique the xray is directed perpendicular to the
bisecting line between the angle of the long axis of the tooth and the
film/sensor [ Ans: ] True, explain.. So when you are parallelling, the angle
you make when you are bisecting is perpendicular to the angle
Pt;s should be drapped with a led apron prior to any radiographic
images? [ Ans: ] True
Which if not a safety precaution for taking x-rays?
, 2
-Always stand behind an appropriate barrier?
-Never stand in the path of primary radiation
-Never stabilize the tube head during radiation
-If neccessary hold the film in the pt's mouth [ Ans: ] If neccessary hold
the film in the pt's mouth, never hold the film or sensor in the pts mouth.
X-rays travel at the speed of light? [ Ans: ] True
Nerve cells can be regennerated? [ Ans: ] False, No- Dense things like
bone can and perm fixtures, restorations.
Which of these have an infulence on radiation protection?
-Safe equipment
© 2026
-Skilled operator
-Lead aprons and thyroid collars
-All of the above [ Ans: ] All of the above
Filters in an x-ray tube is made of what? [ Ans: ] Aluminum
The radiographs which reveal the entire teeth with the apical region is
called what? [ Ans: ] Periapical
X-ray instruments should always be what? [ Ans: ] Sterlized
Tree-like lightening black streaks on a processed film are caused by
what? [ Ans: ] Static electricity when drying
During pregancy a partiant may be irradiated by taking necessary
precations? True or False [ Ans: ] True
