Unit 3 Exam Review Bushong Ch. 6 & 7 well
answered to pass graded A+
What is the purpose of the protective housing? - correct answer ✔✔Guards
against excessive radiation exposure and electric shock. Reduces leakage
radiation. Protects the tube from damage caused by rough handling.
What is the glass enclosure made of and why? - correct answer ✔✔Pyrex glass to
enable it to withstand the tremendous heat generated.
Why does the glass enclosure contain a vacuum? - correct answer ✔✔For longer
tube life and efficient x-ray production.
What happens when gaskets in the glass enclosure? - correct answer ✔✔Fewer x-
rays are produced and more heat is generated.
What are the primary parts of the cathode? - correct answer ✔✔filament and
focusing cup
When electrons are boiled off the filament when the current is sufficiently high -
correct answer ✔✔Thermionic emission
Is the cathode side positive or negative? - correct answer ✔✔Negative
, What is the primary purpose of the Anode? - correct answer ✔✔To support the
tungsten target.
The anode conducts... - correct answer ✔✔Electricity
How does the anode transfer heat? - correct answer ✔✔By the emission of
infrared radiation. This type of heat dissipation is called radiation.
The tungsten alloy - correct answer ✔✔Has a high atomic number, a high melting
point, and a high heat conductivity.
Line focus principal - correct answer ✔✔Allows high anode heating with small
effective local spot.
As the target angle decreases, the effective focal spot ... - correct answer
✔✔decreases
As the effective focal spot decreases image detail... - correct answer ✔✔Increases
Does choosing a small focal spot improve spatial resolution? - correct answer
✔✔Yes
Actual focus spot - correct answer ✔✔Is the area of the target struck by electrons
and from which x-ray and heat are emitted.
answered to pass graded A+
What is the purpose of the protective housing? - correct answer ✔✔Guards
against excessive radiation exposure and electric shock. Reduces leakage
radiation. Protects the tube from damage caused by rough handling.
What is the glass enclosure made of and why? - correct answer ✔✔Pyrex glass to
enable it to withstand the tremendous heat generated.
Why does the glass enclosure contain a vacuum? - correct answer ✔✔For longer
tube life and efficient x-ray production.
What happens when gaskets in the glass enclosure? - correct answer ✔✔Fewer x-
rays are produced and more heat is generated.
What are the primary parts of the cathode? - correct answer ✔✔filament and
focusing cup
When electrons are boiled off the filament when the current is sufficiently high -
correct answer ✔✔Thermionic emission
Is the cathode side positive or negative? - correct answer ✔✔Negative
, What is the primary purpose of the Anode? - correct answer ✔✔To support the
tungsten target.
The anode conducts... - correct answer ✔✔Electricity
How does the anode transfer heat? - correct answer ✔✔By the emission of
infrared radiation. This type of heat dissipation is called radiation.
The tungsten alloy - correct answer ✔✔Has a high atomic number, a high melting
point, and a high heat conductivity.
Line focus principal - correct answer ✔✔Allows high anode heating with small
effective local spot.
As the target angle decreases, the effective focal spot ... - correct answer
✔✔decreases
As the effective focal spot decreases image detail... - correct answer ✔✔Increases
Does choosing a small focal spot improve spatial resolution? - correct answer
✔✔Yes
Actual focus spot - correct answer ✔✔Is the area of the target struck by electrons
and from which x-ray and heat are emitted.
