Test Bank For Principles of Radiographic
Imaging: An Art and a Science exam Questions
and Correct Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download Pdf
1. Which component of the radiographic imaging system is primarily
responsible for converting electrical energy into x-rays?
A. Image receptor
B. Collimator
C. X-ray tube
D. Grid
Answer: C. X-ray tube
Rationale: The x-ray tube converts electrical energy into
electromagnetic radiation in the form of x-rays. Electrons are
accelerated from the cathode toward the anode, where their
interactions produce x-rays. The image receptor records the resulting
,radiation, while the collimator limits the beam and the grid reduces
scatter.
2. What is the primary function of the cathode in an x-ray tube?
A. Absorb scattered radiation
B. Produce and focus electrons
C. Convert x-rays into visible light
D. Rotate the anode
Answer: B. Produce and focus electrons
Rationale: The cathode contains the filament and focusing cup.
Heating the filament causes thermionic emission, releasing electrons
that are focused toward the anode. The anode receives these
electrons and serves as the site of x-ray production.
3. The filament of the x-ray tube is typically made of which material?
A. Copper
B. Tungsten
C. Aluminum
D. Lead
Answer: B. Tungsten
Rationale: Tungsten is used for the filament because it has a very high
melting point and can withstand the intense heat produced during
,electron emission. Its physical properties make it suitable for repeated
heating and cooling during radiographic exposures.
4. What is the primary purpose of the anode in an x-ray tube?
A. Supply electrons
B. Produce x-rays and conduct heat away from the target
C. Filter the primary beam
D. Control exposure time
Answer: B. Produce x-rays and conduct heat away from the target
Rationale: The anode contains the target where accelerated electrons
interact to produce x-rays. It also serves as an important pathway for
dissipating the heat generated during x-ray production.
5. Which factor directly controls the quantity of x-rays produced?
A. kVp
B. mAs
C. SID
D. OID
Answer: B. mAs
Rationale: Milliampere-seconds (mAs) represents tube current
multiplied by exposure time. Increasing mAs increases the number of
, electrons crossing the tube and therefore increases the quantity of x-
rays produced.
6. What does increasing kVp primarily affect?
A. X-ray quantity only
B. Beam penetration and x-ray energy
C. Exposure time only
D. Focal spot size only
Answer: B. Beam penetration and x-ray energy
Rationale: Kilovoltage peak determines the maximum potential
difference across the x-ray tube. Increasing kVp increases the kinetic
energy of the electrons and produces a more energetic, penetrating x-
ray beam. It also affects beam quantity, but its principal role is
controlling photon energy.
7. Which unit is used to express tube current?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: B. Ampere
Imaging: An Art and a Science exam Questions
and Correct Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download Pdf
1. Which component of the radiographic imaging system is primarily
responsible for converting electrical energy into x-rays?
A. Image receptor
B. Collimator
C. X-ray tube
D. Grid
Answer: C. X-ray tube
Rationale: The x-ray tube converts electrical energy into
electromagnetic radiation in the form of x-rays. Electrons are
accelerated from the cathode toward the anode, where their
interactions produce x-rays. The image receptor records the resulting
,radiation, while the collimator limits the beam and the grid reduces
scatter.
2. What is the primary function of the cathode in an x-ray tube?
A. Absorb scattered radiation
B. Produce and focus electrons
C. Convert x-rays into visible light
D. Rotate the anode
Answer: B. Produce and focus electrons
Rationale: The cathode contains the filament and focusing cup.
Heating the filament causes thermionic emission, releasing electrons
that are focused toward the anode. The anode receives these
electrons and serves as the site of x-ray production.
3. The filament of the x-ray tube is typically made of which material?
A. Copper
B. Tungsten
C. Aluminum
D. Lead
Answer: B. Tungsten
Rationale: Tungsten is used for the filament because it has a very high
melting point and can withstand the intense heat produced during
,electron emission. Its physical properties make it suitable for repeated
heating and cooling during radiographic exposures.
4. What is the primary purpose of the anode in an x-ray tube?
A. Supply electrons
B. Produce x-rays and conduct heat away from the target
C. Filter the primary beam
D. Control exposure time
Answer: B. Produce x-rays and conduct heat away from the target
Rationale: The anode contains the target where accelerated electrons
interact to produce x-rays. It also serves as an important pathway for
dissipating the heat generated during x-ray production.
5. Which factor directly controls the quantity of x-rays produced?
A. kVp
B. mAs
C. SID
D. OID
Answer: B. mAs
Rationale: Milliampere-seconds (mAs) represents tube current
multiplied by exposure time. Increasing mAs increases the number of
, electrons crossing the tube and therefore increases the quantity of x-
rays produced.
6. What does increasing kVp primarily affect?
A. X-ray quantity only
B. Beam penetration and x-ray energy
C. Exposure time only
D. Focal spot size only
Answer: B. Beam penetration and x-ray energy
Rationale: Kilovoltage peak determines the maximum potential
difference across the x-ray tube. Increasing kVp increases the kinetic
energy of the electrons and produces a more energetic, penetrating x-
ray beam. It also affects beam quantity, but its principal role is
controlling photon energy.
7. Which unit is used to express tube current?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: B. Ampere
