LRA 211 Final Exam, Questions with Complete Answers, A+
1. Leakage radia-
tion must not Less than 100 mR/hr
ex- ceed
2. Size of
target
window Usually 5cm squared
3. The x-ray tube is
situated in a Protective housing
4. The protective
housing is
made up of -Lead lined structure
-Oil bath (99% heat, 1% x-ray)
-Cooling fans
-Electrical insulation
5. What is the
glass envelope -Large cables
made of -Absorbs stray photons
Borosilicate glass (pyrex) because it is heat resistant
6. Anode The anode is the positive end of the tube. It provides the target for electr
interaction to produce x-rays and is an electrical and thermal conductor.
Designed to dissipate heat
7. Tungsten Has a high atomic number that can withstand heat
8. Stator The stator is made up of electromagnets arranged in pairs around the
rotor. The stator is outside the tube enclosure.
, LRA 211 Final Exam, Questions with Complete Answers, A+
9. Rotor The rotor is made of an iron core surrounded by coils and located in the
center
of the stator but within the enclosure. The rotor does not touch the stator,
nor is it supplied with electric current. It is operated through mutual
induction.
10. Cathode Negative end of the tube. It provides the source of electrons needed for x
ray
production. The cathode is made up of the filaments and the focusing cup
11. Which compo- Focusing cup
nent of the x-
ray tube is
respon- sible
for concen-
trating the
elec- tron
cloud
12. The x-ray tube is X-ray circuit secondary
part of the
13. Thermionic emis- The process of electrons being burned ott of the filament
sion
14. What is the The desired exit point of the x-rays produced. The target window is
tar- get
window de- fashioned to minimally interfere with (absorb) the x-rays
signed for
15. The intensity of On the cathode side
the x-ray beam
is more
16. What reduces
leakage
Protective housing
radiation to
required stan-
dards
, LRA 211 Final Exam, Questions with Complete Answers, A+
17. Free electrons
1. Leakage radia-
tion must not Less than 100 mR/hr
ex- ceed
2. Size of
target
window Usually 5cm squared
3. The x-ray tube is
situated in a Protective housing
4. The protective
housing is
made up of -Lead lined structure
-Oil bath (99% heat, 1% x-ray)
-Cooling fans
-Electrical insulation
5. What is the
glass envelope -Large cables
made of -Absorbs stray photons
Borosilicate glass (pyrex) because it is heat resistant
6. Anode The anode is the positive end of the tube. It provides the target for electr
interaction to produce x-rays and is an electrical and thermal conductor.
Designed to dissipate heat
7. Tungsten Has a high atomic number that can withstand heat
8. Stator The stator is made up of electromagnets arranged in pairs around the
rotor. The stator is outside the tube enclosure.
, LRA 211 Final Exam, Questions with Complete Answers, A+
9. Rotor The rotor is made of an iron core surrounded by coils and located in the
center
of the stator but within the enclosure. The rotor does not touch the stator,
nor is it supplied with electric current. It is operated through mutual
induction.
10. Cathode Negative end of the tube. It provides the source of electrons needed for x
ray
production. The cathode is made up of the filaments and the focusing cup
11. Which compo- Focusing cup
nent of the x-
ray tube is
respon- sible
for concen-
trating the
elec- tron
cloud
12. The x-ray tube is X-ray circuit secondary
part of the
13. Thermionic emis- The process of electrons being burned ott of the filament
sion
14. What is the The desired exit point of the x-rays produced. The target window is
tar- get
window de- fashioned to minimally interfere with (absorb) the x-rays
signed for
15. The intensity of On the cathode side
the x-ray beam
is more
16. What reduces
leakage
Protective housing
radiation to
required stan-
dards
, LRA 211 Final Exam, Questions with Complete Answers, A+
17. Free electrons
