LRA 211 FINAL QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |
GRADED A+ | NEW UPDATE 2025-2026
Leakage radiation must not exceed - ANSWERS Less than 100 mR/hr
Size of target window - ANSWERS Usually 5cm squared
The x-ray tube is situated in a - ANSWERS Protective housing
The protective housing is made up of - ANSWERS -Lead lined structure
-Oil bath (99% heat, 1% x-ray)
-Cooling fans
-Electrical insulation
-Large cables
-Absorbs stray photons
What is the glass envelope made of - ANSWERS Borosilicate glass (pyrex)
because it is heat resistant
Anode - ANSWERS 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 - ANSWERS Has a high atomic number that can withstand heat
Stator - ANSWERS The stator is made up of electromagnets arranged in pairs
around the rotor. The stator is outside the tube enclosure.
Rotor - ANSWERS 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 - ANSWERS 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 - ANSWERS Focusing cup
The x-ray tube is part of the - ANSWERS X-ray circuit secondary
Thermionic emission - ANSWERS The process of electrons being burned off of
the filament
What is the target window designed for - ANSWERS 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 - ANSWERS On the cathode side
, What reduces leakage radiation to required standards - ANSWERS Protective
housing
The term space charge within the x-ray tube refers to - ANSWERS Free
electrons
What makes up the cathode - ANSWERS Dual-focus tubes (2 filaments)
Focusing cup
Molybdenum - ANSWERS Used as the disk base and core because it has a low
thermal conductivity and it is a light but strong alloy
A rotating anode is made up of - ANSWERS A rotating tungsten-coated (high
atomic number) molybdenum disc mounted on a copper shaft with a
molybdenum core
Housing - ANSWERS A protective housing provides solid mechanical support
Electromagnetic radiation - ANSWERS A form of energy that originates from
the atom, can exist apart from matter and travel through a vacuum
The relationship between wavelength and frequency is - ANSWERS Inverse
Wavelengths are measured in - ANSWERS Meters, from crest to crest
DETAILED ANSWERS (VERIFIED ANSWERS) |
GRADED A+ | NEW UPDATE 2025-2026
Leakage radiation must not exceed - ANSWERS Less than 100 mR/hr
Size of target window - ANSWERS Usually 5cm squared
The x-ray tube is situated in a - ANSWERS Protective housing
The protective housing is made up of - ANSWERS -Lead lined structure
-Oil bath (99% heat, 1% x-ray)
-Cooling fans
-Electrical insulation
-Large cables
-Absorbs stray photons
What is the glass envelope made of - ANSWERS Borosilicate glass (pyrex)
because it is heat resistant
Anode - ANSWERS 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 - ANSWERS Has a high atomic number that can withstand heat
Stator - ANSWERS The stator is made up of electromagnets arranged in pairs
around the rotor. The stator is outside the tube enclosure.
Rotor - ANSWERS 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 - ANSWERS 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 - ANSWERS Focusing cup
The x-ray tube is part of the - ANSWERS X-ray circuit secondary
Thermionic emission - ANSWERS The process of electrons being burned off of
the filament
What is the target window designed for - ANSWERS 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 - ANSWERS On the cathode side
, What reduces leakage radiation to required standards - ANSWERS Protective
housing
The term space charge within the x-ray tube refers to - ANSWERS Free
electrons
What makes up the cathode - ANSWERS Dual-focus tubes (2 filaments)
Focusing cup
Molybdenum - ANSWERS Used as the disk base and core because it has a low
thermal conductivity and it is a light but strong alloy
A rotating anode is made up of - ANSWERS A rotating tungsten-coated (high
atomic number) molybdenum disc mounted on a copper shaft with a
molybdenum core
Housing - ANSWERS A protective housing provides solid mechanical support
Electromagnetic radiation - ANSWERS A form of energy that originates from
the atom, can exist apart from matter and travel through a vacuum
The relationship between wavelength and frequency is - ANSWERS Inverse
Wavelengths are measured in - ANSWERS Meters, from crest to crest
