BDA RADIOGRAPHY AND RADIOLOGY EXAM ACTUAL 2026
/2027 HIGH YIELD PRACTICE QUESTIONS AND STUDY
GUIDE ACCURATE EXAM COMPLETE APPROVED
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES (100% CORRECT VERIFIED SOLUTIONS)
CURRENTLY UPDATED VERSION 2026 EDITION
|GUARANTEED PASS A+ |FULL REVISED BDA
RADIOGRAPHY AND RADIOLOGY REAL EXAM | INSTANT
PDF ACCESS
1. X-rays are classified as which type of radiation?
A) Non-ionising radiation
B) CORRECT ANSWER: Ionising radiation
C) Particulate radiation
D) Radio waves
Rationale: X-rays are a form of high-energy electromagnetic
radiation capable of removing tightly bound electrons from atoms,
which defines them as ionising radiation. This property is what
makes them useful for imaging but also requires strict safety
protocols. Non-ionising radiation (e.g., radio waves, microwaves)
lacks sufficient energy to cause ionisation. Particulate radiation
consists of particles (e.g., alpha, beta) rather than electromagnetic
waves.
2. What is the primary mechanism by which diagnostic X-rays are
produced in an X-ray tube?
,A) Characteristic radiation only
B) Bremsstrahlung radiation only
C) CORRECT ANSWER: Both bremsstrahlung and characteristic
radiation
D) Thermionic emission alone
Rationale: Diagnostic X-rays are produced through two
mechanisms. Bremsstrahlung (braking radiation) occurs when high-
speed electrons are decelerated by the nuclear field of the target
atoms, producing a continuous spectrum. Characteristic radiation
occurs when an inner-shell electron is ejected and an outer-shell
electron fills the vacancy, emitting a photon with energy equal to the
difference in binding energies, producing discrete peaks. Both
contribute to the X-ray spectrum.
3. What is the function of the focusing cup in the X-ray tube?
A) To filter low-energy photons
B) CORRECT ANSWER: To direct the electron beam toward the
anode
C) To rotate the anode
D) To absorb scatter radiation
Rationale: The focusing cup is part of the cathode assembly and
concentrates electrons emitted by the filament into a focused stream
,toward the anode target. This ensures sharp image formation by
directing the electron beam precisely onto the focal spot.
4. Which of the following particles has no electrical charge and a
mass approximately equal to that of a proton?
A) Electron
B) Positron
C) CORRECT ANSWER: Neutron
D) Alpha particle
Rationale: The neutron is a subatomic particle found in the nucleus
with no electrical charge (neutral) and a mass slightly greater than
that of a proton (~1.0087 atomic mass units vs. ~1.0073 for a
proton). Electrons and positrons have negligible mass compared to
nucleons, and alpha particles consist of two protons and two
neutrons with a +2 charge.
5. The binding energy of an electron in an atom is greatest for which
shell?
A) N-shell
B) M-shell
C) L-shell
D) CORRECT ANSWER: K-shell
, Rationale: Binding energy refers to the energy required to remove an
electron from its orbital shell. Electrons in the K-shell (innermost
shell, n=1) are closest to the nucleus and experience the strongest
electrostatic attraction, resulting in the highest binding energy.
Binding energy decreases progressively for L, M, N, and outer shells
as distance from the nucleus increases.
6. What is the approximate energy of a photon with a wavelength of
0.1 nm?
A) 1.24 keV
B) CORRECT ANSWER: 12.4 keV
C) 124 keV
D) 1.24 MeV
Rationale: Using the equation E(keV) = 12.4 / λ(Å), where λ = 0.1
nm = 1 Å, the photon energy is 12. = 12.4 keV. This
relationship derives from E = hc/λ, with appropriate unit
conversions for diagnostic radiology applications. Photons of this
energy are typical in diagnostic X-ray imaging.
7. Which type of electromagnetic radiation has the highest
frequency?
A) Radio waves
/2027 HIGH YIELD PRACTICE QUESTIONS AND STUDY
GUIDE ACCURATE EXAM COMPLETE APPROVED
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES (100% CORRECT VERIFIED SOLUTIONS)
CURRENTLY UPDATED VERSION 2026 EDITION
|GUARANTEED PASS A+ |FULL REVISED BDA
RADIOGRAPHY AND RADIOLOGY REAL EXAM | INSTANT
PDF ACCESS
1. X-rays are classified as which type of radiation?
A) Non-ionising radiation
B) CORRECT ANSWER: Ionising radiation
C) Particulate radiation
D) Radio waves
Rationale: X-rays are a form of high-energy electromagnetic
radiation capable of removing tightly bound electrons from atoms,
which defines them as ionising radiation. This property is what
makes them useful for imaging but also requires strict safety
protocols. Non-ionising radiation (e.g., radio waves, microwaves)
lacks sufficient energy to cause ionisation. Particulate radiation
consists of particles (e.g., alpha, beta) rather than electromagnetic
waves.
2. What is the primary mechanism by which diagnostic X-rays are
produced in an X-ray tube?
,A) Characteristic radiation only
B) Bremsstrahlung radiation only
C) CORRECT ANSWER: Both bremsstrahlung and characteristic
radiation
D) Thermionic emission alone
Rationale: Diagnostic X-rays are produced through two
mechanisms. Bremsstrahlung (braking radiation) occurs when high-
speed electrons are decelerated by the nuclear field of the target
atoms, producing a continuous spectrum. Characteristic radiation
occurs when an inner-shell electron is ejected and an outer-shell
electron fills the vacancy, emitting a photon with energy equal to the
difference in binding energies, producing discrete peaks. Both
contribute to the X-ray spectrum.
3. What is the function of the focusing cup in the X-ray tube?
A) To filter low-energy photons
B) CORRECT ANSWER: To direct the electron beam toward the
anode
C) To rotate the anode
D) To absorb scatter radiation
Rationale: The focusing cup is part of the cathode assembly and
concentrates electrons emitted by the filament into a focused stream
,toward the anode target. This ensures sharp image formation by
directing the electron beam precisely onto the focal spot.
4. Which of the following particles has no electrical charge and a
mass approximately equal to that of a proton?
A) Electron
B) Positron
C) CORRECT ANSWER: Neutron
D) Alpha particle
Rationale: The neutron is a subatomic particle found in the nucleus
with no electrical charge (neutral) and a mass slightly greater than
that of a proton (~1.0087 atomic mass units vs. ~1.0073 for a
proton). Electrons and positrons have negligible mass compared to
nucleons, and alpha particles consist of two protons and two
neutrons with a +2 charge.
5. The binding energy of an electron in an atom is greatest for which
shell?
A) N-shell
B) M-shell
C) L-shell
D) CORRECT ANSWER: K-shell
, Rationale: Binding energy refers to the energy required to remove an
electron from its orbital shell. Electrons in the K-shell (innermost
shell, n=1) are closest to the nucleus and experience the strongest
electrostatic attraction, resulting in the highest binding energy.
Binding energy decreases progressively for L, M, N, and outer shells
as distance from the nucleus increases.
6. What is the approximate energy of a photon with a wavelength of
0.1 nm?
A) 1.24 keV
B) CORRECT ANSWER: 12.4 keV
C) 124 keV
D) 1.24 MeV
Rationale: Using the equation E(keV) = 12.4 / λ(Å), where λ = 0.1
nm = 1 Å, the photon energy is 12. = 12.4 keV. This
relationship derives from E = hc/λ, with appropriate unit
conversions for diagnostic radiology applications. Photons of this
energy are typical in diagnostic X-ray imaging.
7. Which type of electromagnetic radiation has the highest
frequency?
A) Radio waves
