BDA radiography Test Questions and
Answers
Question 1
what sense is used to detect xrays?
Correct Answer
Xrays cannot be detected by any human sense
Question 2
what type of radiation are xrays?
Correct Answer
electromagnetic
Question 3
If an x-ray photon passes straight through the patient without touching them, we say
it has been?
Correct Answer
Transmitted, X-rays can interact with the patient's tissues in a number of ways, but
it's important to remember x-rays can just pass straight through without touching
anything. That's why it's vital you never stand in the path of the x-ray beam
Question 4
Inside a dental x-ray tube, what is the anode made of?
Correct Answer
A tungsten target set into a copper block
Page 1 of 15
, Question 5
What setting on the control panel determines the energy range of the x-rays
produced?
Correct Answer
kV, kV sets the energy range of the x-ray beam.
Question 6
What do we mean by 'indirect damage' when describing the effects of x-rays on
patient's tissue?
Correct Answer
X-rays hitting water and creating damaging, toxic chemicals, Indirect damage occurs
when x-rays hit water molecules, turning them into toxic chemicals like hydrogen
peroxide. These toxic molecules can go on to cause damage throughout the cell.
Question 7
Which effects of X-rays principally concern the dental profession?
Correct Answer
Somatic stochastic effects, we are mostly concerned about the chances of causing
damage to normal body cells.
Question 8
What is the highest, safe dose of radiation that's 100% guaranteed not to cause any
negative health effects?
Correct Answer
0 mSv
Question 9
What age group is most at risk of radiation induced cancer?
Correct Answer
0-20yrs old, cancer typically (but not exclusively) takes time to develop. So, taking
DNA damage at a young age leaves more time to develop into something serious.
Page 2 of 15
Answers
Question 1
what sense is used to detect xrays?
Correct Answer
Xrays cannot be detected by any human sense
Question 2
what type of radiation are xrays?
Correct Answer
electromagnetic
Question 3
If an x-ray photon passes straight through the patient without touching them, we say
it has been?
Correct Answer
Transmitted, X-rays can interact with the patient's tissues in a number of ways, but
it's important to remember x-rays can just pass straight through without touching
anything. That's why it's vital you never stand in the path of the x-ray beam
Question 4
Inside a dental x-ray tube, what is the anode made of?
Correct Answer
A tungsten target set into a copper block
Page 1 of 15
, Question 5
What setting on the control panel determines the energy range of the x-rays
produced?
Correct Answer
kV, kV sets the energy range of the x-ray beam.
Question 6
What do we mean by 'indirect damage' when describing the effects of x-rays on
patient's tissue?
Correct Answer
X-rays hitting water and creating damaging, toxic chemicals, Indirect damage occurs
when x-rays hit water molecules, turning them into toxic chemicals like hydrogen
peroxide. These toxic molecules can go on to cause damage throughout the cell.
Question 7
Which effects of X-rays principally concern the dental profession?
Correct Answer
Somatic stochastic effects, we are mostly concerned about the chances of causing
damage to normal body cells.
Question 8
What is the highest, safe dose of radiation that's 100% guaranteed not to cause any
negative health effects?
Correct Answer
0 mSv
Question 9
What age group is most at risk of radiation induced cancer?
Correct Answer
0-20yrs old, cancer typically (but not exclusively) takes time to develop. So, taking
DNA damage at a young age leaves more time to develop into something serious.
Page 2 of 15
