RAD PHYSICS FINAL STUDY GUIDE EXAM QUESTIONS & ANSWERS 2024
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Course
RAD PHYSICS
Institution
RAD PHYSICS
RAD PHYSICS FINAL STUDY GUIDE EXAM QUESTIONS & ANSWERS 2024
Excessive anode heating can cause evaporation of tungsten that is deposited on the port window. This can result in:
1. Decreased tube output
2. Tube failure
3. Electrical arcing - ANSWERS1, 2, and 3
To determine how quickly an x...
RAD PHYSICS FINAL STUDY GUIDE
EXAM QUESTIONS & ANSWERS 2024
Excessive anode heating can cause evaporation of tungsten that is deposited on the port window. This
can result in:
1. Decreased tube output
2. Tube failure
3. Electrical arcing - ANSWERS1, 2, and 3
To determine how quickly an x-ray tube will disperse its accumulated heat, the radiographer uses a(n): -
ANSWERSAnode cooling curve
Which of the following formulas would a radiographer use to determine the total number of heat units
produced in a given exposure using a single-phase x-ray unit? - ANSWERSmA x time x kVp
The half-value layer of an x-ray beam indicates: - ANSWERSbeam quality
The radiation produced at very discrete energies of approximately 69 keV when electrons interact with
the K-shell of the tungsten target atoms is called? - ANSWERScharacteristic
When the kVp is increased, x-ray quantity: - ANSWERSalso increases
How many half-value layers would be required to reduce a beam intensity of 342 mR to 43 mR? -
ANSWERS3
Radiation that passes through the tube housing in the directions other than the useful beam is termed: -
ANSWERSLeakage radiation
What is the minimum amount of total filtration required when an x-ray tube is operating at 70 kVp? -
ANSWERS2.5 mm aluminum
,What type of device would increase the diagnostic quality of a radiograph of the dorsoplantar projection
of the foot? - ANSWERSwedge filter
What combination of exposure factors results in the highest quantity x-ray beam? - ANSWERS96 kVp and
2.5 mm Al filtration
Which of the following transitions would result in production of the highest energy characteristic x-ray? -
ANSWERSO shell to K shell
The type(s) of radiation produced in the target is (are):
I. Photoelectric
II. Characteristic
III. Bremsstrahlung - ANSWERSII and III
Anode angle will have an effect on the:
1. Severity of the anode heel effect
2. Effective focal spot size
3. Spatial resolution - ANSWERS1, 2, AND 3
Which of the following occurs during bremsstrahlung radiation production? - ANSWERSAn electron
approaching a positive nuclear charge changes direction and loses energy.
Which of the following constitutes the largest portion of the x-ray beam emerging from the target? -
ANSWERSBremsstrahlung
Which of the following will serve to increase the average energy of the x-ray beam?
1. Increase in added filtration
2. Increase in kilovoltage
3. Increase in milliamperage - ANSWERS1 and 2
, Tungsten alloy is the usual choice for the anode target material of radiographic equipment because it:
1. Has a high atomic number
2. Has a high melting point
3. Can readily dissipate heat - ANSWERS1, 2, and 3
What is the advantage of the rotating anode over the stationary anode? - ANSWERSGreater heat-loading
capacity
Filters used in x-ray tubes are generally made of: - ANSWERSAluminum
The federal standard for leakage radiation from an x-ray tube housing is: - ANSWERSLess than 1mGy/h at
1 meter
When projectile electrons from a filament enters a target atom and interacts with the nuclear force field,
it will: - ANSWERSdecrease velocity
The area under the x-ray emission spectrum best represents: - ANSWERSThe total number of photons
emitted
The primary purpose of adding filtration to a diagnostic x-ray beam is to? - ANSWERSRemove low energy
photons
Which of the following will affect both the quantity and quality of the primary beam?
A. HVL
B. kVp
C. mAs - ANSWERSB only
The life of a x-ray tube can be extended by:
1. Not exceeding the tube limit for individual exposures
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