Review: Basic X-Ray Machine Operator
Certification Exam| Questions and Answers
Verified 100% Correct
X-ray tubes should undergo the warm-up procedure again after they have been idle for more
than: - ✔✔1 hour
What is the heat unit (HU) of the anode if 200 mA, 0.10 sec., and 80 kVp is used on a single-
phase generator? - ✔✔1600
How many heat units (HU) are generated on a high frequency (HF) generator if an exposure
time of 300 mA, 0.12 sec., and 95 kVp is used? - ✔✔3,420
What will help prolong the life of an x-ray tube? - ✔✔1. warm up the anode each morning
2. use low ma setting whenever possible
3. use the low-speed rotor whenever possible
Which of the following x-ray generators produces the greatest amount of x-rays for the same
exposure technique? - ✔✔High-frequency
Radiographic contrast is controlled by the: - ✔✔kVp
The quantity, or number of photons produced per second during an exposure is controlled by
the: - ✔✔mA
The variation in tissue densities within the patient is referred to as the: - ✔✔Subject contrast
,The overall contrast seen in the radiographic image is referred to as: - ✔✔Radiographic
contrast
What are considered a part of shape distortion? - ✔✔foreshortening
elongation
The unsharp edges of a body part are referred to as the: - ✔✔Penumbra
What would be considered involuntary motion? - ✔✔1. tremors
2. peristalsis
3. heartbeats
Quantum mottle is typically seen on the radiographic image when using: - ✔✔high mA, high
kVp techniques
The primary controlling factor of penetration of x-rays is: - ✔✔kVp
The term used in the new digital imaging environment to replace density is: - ✔✔Brightness
The geometric factors that affect the formation of the image are: - ✔✔1. SID
2. OID
3. Focal spot
When using computed radiography (CR), where is the latent image stored until it is processed? -
✔✔In a photostimulable phosphor plate
Digital imaging requires that the exposure technique is accurately set. Which of the following is
the most critical of the exposure factors? - ✔✔kVp
, One of the major advantages of using CR or DR systems is the: - ✔✔The ability to see images
very fast
All of the digital images made in an x-ray department are stored in a system called the: -
✔✔PACS
When a CR plate is inserted into the reader for processing, the phosphor is scanned with a: -
✔✔Laser beam.
What is the size of the flat-panel detector inside the table of a DR system? - ✔✔17 x 17 in.
The viewing monitor's active viewing area is called a: - ✔✔Matrix
The amount of detail or sharpness in the digital image is termed: - ✔✔Spatial resolution
Which control on the viewing station control the density, or brightness, in the radiographic
image? - ✔✔Window level
Which of the following tells the operator that the correct exposure has been received by the
phosphors in the imaging plate? - ✔✔Exposure indicator number
The negative effect of scatter radiation reaching the image receptor (IR) is: - ✔✔Fog
Scatter radiation can be controlled by: - ✔✔1. grids
2. reducing field size
The effectiveness of a radiographic grid is determined by the: - ✔✔Grid ratio
Certification Exam| Questions and Answers
Verified 100% Correct
X-ray tubes should undergo the warm-up procedure again after they have been idle for more
than: - ✔✔1 hour
What is the heat unit (HU) of the anode if 200 mA, 0.10 sec., and 80 kVp is used on a single-
phase generator? - ✔✔1600
How many heat units (HU) are generated on a high frequency (HF) generator if an exposure
time of 300 mA, 0.12 sec., and 95 kVp is used? - ✔✔3,420
What will help prolong the life of an x-ray tube? - ✔✔1. warm up the anode each morning
2. use low ma setting whenever possible
3. use the low-speed rotor whenever possible
Which of the following x-ray generators produces the greatest amount of x-rays for the same
exposure technique? - ✔✔High-frequency
Radiographic contrast is controlled by the: - ✔✔kVp
The quantity, or number of photons produced per second during an exposure is controlled by
the: - ✔✔mA
The variation in tissue densities within the patient is referred to as the: - ✔✔Subject contrast
,The overall contrast seen in the radiographic image is referred to as: - ✔✔Radiographic
contrast
What are considered a part of shape distortion? - ✔✔foreshortening
elongation
The unsharp edges of a body part are referred to as the: - ✔✔Penumbra
What would be considered involuntary motion? - ✔✔1. tremors
2. peristalsis
3. heartbeats
Quantum mottle is typically seen on the radiographic image when using: - ✔✔high mA, high
kVp techniques
The primary controlling factor of penetration of x-rays is: - ✔✔kVp
The term used in the new digital imaging environment to replace density is: - ✔✔Brightness
The geometric factors that affect the formation of the image are: - ✔✔1. SID
2. OID
3. Focal spot
When using computed radiography (CR), where is the latent image stored until it is processed? -
✔✔In a photostimulable phosphor plate
Digital imaging requires that the exposure technique is accurately set. Which of the following is
the most critical of the exposure factors? - ✔✔kVp
, One of the major advantages of using CR or DR systems is the: - ✔✔The ability to see images
very fast
All of the digital images made in an x-ray department are stored in a system called the: -
✔✔PACS
When a CR plate is inserted into the reader for processing, the phosphor is scanned with a: -
✔✔Laser beam.
What is the size of the flat-panel detector inside the table of a DR system? - ✔✔17 x 17 in.
The viewing monitor's active viewing area is called a: - ✔✔Matrix
The amount of detail or sharpness in the digital image is termed: - ✔✔Spatial resolution
Which control on the viewing station control the density, or brightness, in the radiographic
image? - ✔✔Window level
Which of the following tells the operator that the correct exposure has been received by the
phosphors in the imaging plate? - ✔✔Exposure indicator number
The negative effect of scatter radiation reaching the image receptor (IR) is: - ✔✔Fog
Scatter radiation can be controlled by: - ✔✔1. grids
2. reducing field size
The effectiveness of a radiographic grid is determined by the: - ✔✔Grid ratio
