BU DENTAL RADIOLOGY FINAL TEST
EXAM QUESTIONS AND CORRECT
ANSWERS. VERIFIED 2025/2026.
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
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
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, 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
-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
-All of the above - ANS All of the above
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
EXAM QUESTIONS AND CORRECT
ANSWERS. VERIFIED 2025/2026.
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
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
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, 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
-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
-All of the above - ANS All of the above
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
