RADIOLOGY EXAM WITH CORRECT QUESTIONS AND ANSWERS
An original radiograph is exposed at 8 mA for 1.0 second. If the mA is increased to 10, which of the
following exposure times would be correct to maintain radiographic density?
0.4 second
0.6 second
0.8 second
1.0 second - -0.8 second
-Dental x-ray machines contain each of the following components except one. Which one is the
exception?
Control panel
Extension arm
Radioactive material
Tube head - -Radioactive material
-Direct (DC) current is best suited for use with digital radiography, and may produce more consistent
exposures at the very short exposure times.
The first part of the statement is correct, the second part of the statement is not correct.
The first part of the statement is not correct, the second part of the statement is correct.
Both parts of the statement are correct.
Both parts of the statement are not correct. - -Both parts of the statement are correct.
-Each of the following appears radiopaque except one. Which one is the exception?
Bone
Dentin
Pulp
Enamel - -Pulp
-Each of the following conditions must exist for x-rays to be produced except one. Which one is the
exception?
A target capable of stopping the electrons
An air-filled glass tube
High voltage to impart speed to the electrons
A source of free electrons - -An air-filled glass tube
-Each of the following is a form of ionizing radiation except one. Which one is the exception?
Cosmic rays
X-rays
Radio waves
Gamma rays - -Radio waves
-Each of the following is a potential use of dental radiographs except one. Which one is the exception?
Diagnosing dental caries
Evaluating development of dentition
, Detecting missing teeth
Assessing patient home-care, ie oral hygiene
Evaluating trauma to teeth and supporting bone - -Assessing patient home-care, ie oral hygiene
-Each of the following is a term used to describe visual radiographic image characteristics except one.
Which one is the exception?
Sharpness
Contrast
Milliamperage
Density - -Milliamperage
-Each of the following results in reduced image sharpness except one. Which one is the exception?
Patient movement during exposure
Image receptor positioned close to the teeth
A short PID
The use of intensifying screens - -Image receptor positioned close to the teeth
-Each of the following statements about electromagnetic radiations is true except one. Which one is the
exception?
They have a negative electrical charge.
They have no mass.
They pass through space as particles and in a wavelike motion.
They have no weight. - -They have a negative electrical charge.
-Early researchers working in the field of radiography were not aware that continued exposure to x-rays
produced accumulations of radiation effects in the body because x-rays are invisible.
Both the statement and reason are correct and related.
Both the statement and reason are correct but not related.
The statement is correct, but the reason is not.
The statement is not correct, but the reason is correct.
Neither the statement nor the reason is correct. - -Both the statement and reason are correct and
related.
-How does the radiographer know when the x-ray exposure cycle is complete?
When the dead-man switch cannot be depressed
When the audible beep stops
When the timer dial completes the rotation
When the indicator light illuminates - -When the audible beep stops
-How many electrical circuits are used in a dental x-ray machine?
One
Two
Three
Four - -Two
-Image magnification can be decreased by
increasing the target-object distance.
An original radiograph is exposed at 8 mA for 1.0 second. If the mA is increased to 10, which of the
following exposure times would be correct to maintain radiographic density?
0.4 second
0.6 second
0.8 second
1.0 second - -0.8 second
-Dental x-ray machines contain each of the following components except one. Which one is the
exception?
Control panel
Extension arm
Radioactive material
Tube head - -Radioactive material
-Direct (DC) current is best suited for use with digital radiography, and may produce more consistent
exposures at the very short exposure times.
The first part of the statement is correct, the second part of the statement is not correct.
The first part of the statement is not correct, the second part of the statement is correct.
Both parts of the statement are correct.
Both parts of the statement are not correct. - -Both parts of the statement are correct.
-Each of the following appears radiopaque except one. Which one is the exception?
Bone
Dentin
Pulp
Enamel - -Pulp
-Each of the following conditions must exist for x-rays to be produced except one. Which one is the
exception?
A target capable of stopping the electrons
An air-filled glass tube
High voltage to impart speed to the electrons
A source of free electrons - -An air-filled glass tube
-Each of the following is a form of ionizing radiation except one. Which one is the exception?
Cosmic rays
X-rays
Radio waves
Gamma rays - -Radio waves
-Each of the following is a potential use of dental radiographs except one. Which one is the exception?
Diagnosing dental caries
Evaluating development of dentition
, Detecting missing teeth
Assessing patient home-care, ie oral hygiene
Evaluating trauma to teeth and supporting bone - -Assessing patient home-care, ie oral hygiene
-Each of the following is a term used to describe visual radiographic image characteristics except one.
Which one is the exception?
Sharpness
Contrast
Milliamperage
Density - -Milliamperage
-Each of the following results in reduced image sharpness except one. Which one is the exception?
Patient movement during exposure
Image receptor positioned close to the teeth
A short PID
The use of intensifying screens - -Image receptor positioned close to the teeth
-Each of the following statements about electromagnetic radiations is true except one. Which one is the
exception?
They have a negative electrical charge.
They have no mass.
They pass through space as particles and in a wavelike motion.
They have no weight. - -They have a negative electrical charge.
-Early researchers working in the field of radiography were not aware that continued exposure to x-rays
produced accumulations of radiation effects in the body because x-rays are invisible.
Both the statement and reason are correct and related.
Both the statement and reason are correct but not related.
The statement is correct, but the reason is not.
The statement is not correct, but the reason is correct.
Neither the statement nor the reason is correct. - -Both the statement and reason are correct and
related.
-How does the radiographer know when the x-ray exposure cycle is complete?
When the dead-man switch cannot be depressed
When the audible beep stops
When the timer dial completes the rotation
When the indicator light illuminates - -When the audible beep stops
-How many electrical circuits are used in a dental x-ray machine?
One
Two
Three
Four - -Two
-Image magnification can be decreased by
increasing the target-object distance.
