BU DENTAL RADIOLOGY EXAM Question
and Answer 2026 | Ultimate Exam
Preparation Bundle | Grade A+
• What does the x-ray tube contain? -✓✓cathode anode and focusing cup
• Who discovered what x-rays were? -✓✓Wilhelm Conrad Roentgen
• In a dental x-ray tube the electrons are emitted from the what? -✓✓Cathode
• X-ray is produced when electrons moving at a high speed hit the tugstnen target
in a x-ray tube. T or F -✓✓True
• an assistant may hold the film or sensor in place for the pt during exposure -
✓✓False
• As soon as a film or sensor is placed in a pt's mouth it is considered
contaminated? -✓✓True
• X-rays are ionizing radiation. -✓✓True
• Bitewings show what? -✓✓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 -✓✓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? -
✓✓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 -✓✓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? -✓✓True
• Nerve cells can be regennerated? -✓✓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 -✓✓All of the above
• Filters in an x-ray tube is made of what? -✓✓Aluminum
• The radiographs which reveal the entire teeth with the apical region is called
what? -✓✓Periapical
• X-ray instruments should always be what? -✓✓Sterlized
• Tree-like lightening black streaks on a processed film are caused by what? -
✓✓Static electricity when drying
• During pregancy a partiant may be irradiated by taking necessary precations?
True or False -✓✓True
• In your office the radiographs turn brown with age almost all of the time. What
corrective action do you take? -✓✓Wash the film properly after fixing
• When the ID dot appers near the apex of the tooth it means what? -✓✓The film
was placed in the holder incorrectly
• A darkroom safe light should be at least how many feet away from the film
being opened? -✓✓4 feet
and Answer 2026 | Ultimate Exam
Preparation Bundle | Grade A+
• What does the x-ray tube contain? -✓✓cathode anode and focusing cup
• Who discovered what x-rays were? -✓✓Wilhelm Conrad Roentgen
• In a dental x-ray tube the electrons are emitted from the what? -✓✓Cathode
• X-ray is produced when electrons moving at a high speed hit the tugstnen target
in a x-ray tube. T or F -✓✓True
• an assistant may hold the film or sensor in place for the pt during exposure -
✓✓False
• As soon as a film or sensor is placed in a pt's mouth it is considered
contaminated? -✓✓True
• X-rays are ionizing radiation. -✓✓True
• Bitewings show what? -✓✓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 -✓✓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? -
✓✓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 -✓✓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? -✓✓True
• Nerve cells can be regennerated? -✓✓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 -✓✓All of the above
• Filters in an x-ray tube is made of what? -✓✓Aluminum
• The radiographs which reveal the entire teeth with the apical region is called
what? -✓✓Periapical
• X-ray instruments should always be what? -✓✓Sterlized
• Tree-like lightening black streaks on a processed film are caused by what? -
✓✓Static electricity when drying
• During pregancy a partiant may be irradiated by taking necessary precations?
True or False -✓✓True
• In your office the radiographs turn brown with age almost all of the time. What
corrective action do you take? -✓✓Wash the film properly after fixing
• When the ID dot appers near the apex of the tooth it means what? -✓✓The film
was placed in the holder incorrectly
• A darkroom safe light should be at least how many feet away from the film
being opened? -✓✓4 feet
