LRA 211 FINAL QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
||UPDATED 2025
Leakage radiation must not exceed:
Answer: ✔️
Less than 100 mR/hr.
Size of target window:
Answer: ✔️
Usually 5 cm².
The x-ray tube is situated in a:
Answer: ✔️
Protective housing.
The protective housing is made up of:
Lead-lined structure
Oil bath (99% heat, 1% x-ray)
Cooling fans
Electrical insulation
Large cables
Absorbs stray photons
Answer: ✔️
All of the above.
,What is the glass envelope made of
Borosilicate glass (pyrex) because it is heat resistant
Anode
The anode is the positive end of the tube. It provides the target for electron
interaction to produce x-rays and is an electrical and thermal conductor. Designed
to dissipate heat
Tungsten
Has a high atomic number that can withstand heat
Stator
The stator is made up of electromagnets arranged in pairs around the rotor. The
stator is outside the tube enclosure.
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.
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
Which component of the x-ray tube is responsible for concentrating the electron
cloud
Focusing cup
The x-ray tube is part of the
X-ray circuit secondary
Thermionic emission
The process of electrons being burned off of the filament
What is the target window designed for
The desired exit point of the x-rays produced. The target window is fashioned to
minimally interfere with (absorb) the x-rays
The intensity of the x-ray beam is more
On the cathode side
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
||UPDATED 2025
Leakage radiation must not exceed:
Answer: ✔️
Less than 100 mR/hr.
Size of target window:
Answer: ✔️
Usually 5 cm².
The x-ray tube is situated in a:
Answer: ✔️
Protective housing.
The protective housing is made up of:
Lead-lined structure
Oil bath (99% heat, 1% x-ray)
Cooling fans
Electrical insulation
Large cables
Absorbs stray photons
Answer: ✔️
All of the above.
,What is the glass envelope made of
Borosilicate glass (pyrex) because it is heat resistant
Anode
The anode is the positive end of the tube. It provides the target for electron
interaction to produce x-rays and is an electrical and thermal conductor. Designed
to dissipate heat
Tungsten
Has a high atomic number that can withstand heat
Stator
The stator is made up of electromagnets arranged in pairs around the rotor. The
stator is outside the tube enclosure.
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.
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
Which component of the x-ray tube is responsible for concentrating the electron
cloud
Focusing cup
The x-ray tube is part of the
X-ray circuit secondary
Thermionic emission
The process of electrons being burned off of the filament
What is the target window designed for
The desired exit point of the x-rays produced. The target window is fashioned to
minimally interfere with (absorb) the x-rays
The intensity of the x-ray beam is more
On the cathode side
