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BU Dental Radiology EXAM 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
Properties of Xrays [ Ans: ] 1. X-rays are weightless package of pure
energy
2. They have no electrical charge
3. They travel at the speed of light
© 2026
4. They travel in straight line but diverge from a central focus
5. They have enough energy to ionize and cause biological damage
6. They can cause certain substances to fluoresce and affect
photographic film.
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 tungsten
target in a x-ray tube. [ Ans: ] True
an assistant may hold the film or sensor in place for the pt during
exposure [ Ans: ] False
As soon as a film or sensor is placed in a pt's mouth it is considered
contaminated? [ Ans: ] True
, 2
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?
-Always stand behind an appropriate barrier?
-Never stand in the path of primary radiation
© 2026
-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
-Skilled operator
-Lead aprons and thyroid collars
BU Dental Radiology EXAM 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
Properties of Xrays [ Ans: ] 1. X-rays are weightless package of pure
energy
2. They have no electrical charge
3. They travel at the speed of light
© 2026
4. They travel in straight line but diverge from a central focus
5. They have enough energy to ionize and cause biological damage
6. They can cause certain substances to fluoresce and affect
photographic film.
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 tungsten
target in a x-ray tube. [ Ans: ] True
an assistant may hold the film or sensor in place for the pt during
exposure [ Ans: ] False
As soon as a film or sensor is placed in a pt's mouth it is considered
contaminated? [ Ans: ] True
, 2
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?
-Always stand behind an appropriate barrier?
-Never stand in the path of primary radiation
© 2026
-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
-Skilled operator
-Lead aprons and thyroid collars
