LRA 211 FINAL EXAM STUDY GUIDE
2026/2027 ACCURATE QUESTIONS WITH
CORRECT DETAILED SOLUTIONS ||
100% GUARANTEED PASS
<RECENT VERSION>
1. Who discovered the electron? - ANSWER ✔ JJ Thomson
2. The earliest atomic theory based on arrangement similar to the solar system
is attributed to? - ANSWER ✔ Rutherford
3. What are the three fundamental particles of the atom? - ANSWER ✔
proton, neutron and electron
4. what does the atomic nucleus contain? - ANSWER ✔ protons and neutrons
5. What is the component of the nucleus that has a positive charge and mass? -
ANSWER ✔ proton
6. What is the component of the nucleus that has mass but no electrical charge
is? - ANSWER ✔ neutron
7. when an atom has more electrons than protons it will have: - ANSWER ✔ a
negative charge
,8. When an atom becomes negatively or positively charged it is usually due to
a change in the number of - ANSWER ✔ electrons
9. a negative ion is - ANSWER ✔ an atom with more electrons than protons
10.a positive ion is - ANSWER ✔ an atom with more protons than electrons
11.the electron shell closest to the nucleus is - ANSWER ✔ k shell
12.which electromagnetic radiation has the lowest energy level? - ANSWER ✔
radio waves
13.As the wave's frequency increases, the wavelength: - ANSWER ✔
decreases
14.the primary source of radiation exposure to the radiographer who is in the
room during an exposure is - ANSWER ✔ from scatter from the patient
15.To minimize occupational exposure, the technologist should - ANSWER ✔
wear protective apparel when in the room during imaging and stand away
from the patient
16.4 things make an x-ray - ANSWER ✔ 1. Vacuum
2. Source if electrons
3. High potential difference
4. Deacceleration of electrons
,17.Bremsstrahlung Interaction - ANSWER ✔ An incident electron interacts
with the force field of the nucleus, causing the incident electron to slow
down, thus diverting the electron's course. The electron loses energy and
changes direction. The energy lost is a bremsstrahlung photon, and the
photon energy is half the difference between the entering and exiting kinetic
energy of the electron.
18.Characteristic interaction - ANSWER ✔ The incident electron interacts with
an inner-shell electron, knocking out the inner-shell electron and continuing
in a slightly different direction, which creates a hole in the inner shell,
making the shell unstable.
19.maximum allowed leakage from machine - ANSWER ✔ 100 mR per
hr/meter
20.when the wavelength increases what happens to the energy - ANSWER ✔
also increases
21.artifact - ANSWER ✔ unwanted image
22.What does increased unsharpness do to the contrast of small anatomic
structures? - ANSWER ✔ Increased unsharpness DECREASES the
brightness difference (contrast) between the area of interest and its
background → reduces overall visibility of small structural lines.
23.What does the instructor state about a radiographic image being an exact
reconstruction of anatomy? - ANSWER ✔ 'A radiographic image
CANNOT be an exact reconstruction of the anatomic structure — some
information is ALWAYS LOST during image formation.'
, 24.Defendant - ANSWER ✔ The party being sued in a lawsuit, typically in the
context of civil law where one individual commits a tort against another.
25.E-chart - ANSWER ✔ Digital form of patient's medical history, part of the
shift towards electronic charting to improve accessibility and management of
patient information.
26.Charting - ANSWER ✔ The process of adding information to a chart or a
document that becomes part of the chart, involving the documentation of
care provided to patients.
27.Battery - ANSWER ✔ Unlawful touching of a person without consent,
which could include performing a radiograph against a patient's will.
28.Informed consent - ANSWER ✔ Necessary for procedures involving
substantial risk, requiring a full explanation of the procedure, its risks, and
benefits, with the patient's agreement documented through a signed form.
29.Negligence - ANSWER ✔ The neglect or omission of reasonable care or
caution, judged against the standard of a reasonably prudent person.
30.Chart - ANSWER ✔ Refers to the comprehensive compilation of patient
information, now primarily in digital format as an electronic medical record
(EMR) or e-chart.
31.Res ipsa loquitur - ANSWER ✔ A doctrine applied when negligence and
loss are obvious, meaning 'the thing speaks for itself.'
2026/2027 ACCURATE QUESTIONS WITH
CORRECT DETAILED SOLUTIONS ||
100% GUARANTEED PASS
<RECENT VERSION>
1. Who discovered the electron? - ANSWER ✔ JJ Thomson
2. The earliest atomic theory based on arrangement similar to the solar system
is attributed to? - ANSWER ✔ Rutherford
3. What are the three fundamental particles of the atom? - ANSWER ✔
proton, neutron and electron
4. what does the atomic nucleus contain? - ANSWER ✔ protons and neutrons
5. What is the component of the nucleus that has a positive charge and mass? -
ANSWER ✔ proton
6. What is the component of the nucleus that has mass but no electrical charge
is? - ANSWER ✔ neutron
7. when an atom has more electrons than protons it will have: - ANSWER ✔ a
negative charge
,8. When an atom becomes negatively or positively charged it is usually due to
a change in the number of - ANSWER ✔ electrons
9. a negative ion is - ANSWER ✔ an atom with more electrons than protons
10.a positive ion is - ANSWER ✔ an atom with more protons than electrons
11.the electron shell closest to the nucleus is - ANSWER ✔ k shell
12.which electromagnetic radiation has the lowest energy level? - ANSWER ✔
radio waves
13.As the wave's frequency increases, the wavelength: - ANSWER ✔
decreases
14.the primary source of radiation exposure to the radiographer who is in the
room during an exposure is - ANSWER ✔ from scatter from the patient
15.To minimize occupational exposure, the technologist should - ANSWER ✔
wear protective apparel when in the room during imaging and stand away
from the patient
16.4 things make an x-ray - ANSWER ✔ 1. Vacuum
2. Source if electrons
3. High potential difference
4. Deacceleration of electrons
,17.Bremsstrahlung Interaction - ANSWER ✔ An incident electron interacts
with the force field of the nucleus, causing the incident electron to slow
down, thus diverting the electron's course. The electron loses energy and
changes direction. The energy lost is a bremsstrahlung photon, and the
photon energy is half the difference between the entering and exiting kinetic
energy of the electron.
18.Characteristic interaction - ANSWER ✔ The incident electron interacts with
an inner-shell electron, knocking out the inner-shell electron and continuing
in a slightly different direction, which creates a hole in the inner shell,
making the shell unstable.
19.maximum allowed leakage from machine - ANSWER ✔ 100 mR per
hr/meter
20.when the wavelength increases what happens to the energy - ANSWER ✔
also increases
21.artifact - ANSWER ✔ unwanted image
22.What does increased unsharpness do to the contrast of small anatomic
structures? - ANSWER ✔ Increased unsharpness DECREASES the
brightness difference (contrast) between the area of interest and its
background → reduces overall visibility of small structural lines.
23.What does the instructor state about a radiographic image being an exact
reconstruction of anatomy? - ANSWER ✔ 'A radiographic image
CANNOT be an exact reconstruction of the anatomic structure — some
information is ALWAYS LOST during image formation.'
, 24.Defendant - ANSWER ✔ The party being sued in a lawsuit, typically in the
context of civil law where one individual commits a tort against another.
25.E-chart - ANSWER ✔ Digital form of patient's medical history, part of the
shift towards electronic charting to improve accessibility and management of
patient information.
26.Charting - ANSWER ✔ The process of adding information to a chart or a
document that becomes part of the chart, involving the documentation of
care provided to patients.
27.Battery - ANSWER ✔ Unlawful touching of a person without consent,
which could include performing a radiograph against a patient's will.
28.Informed consent - ANSWER ✔ Necessary for procedures involving
substantial risk, requiring a full explanation of the procedure, its risks, and
benefits, with the patient's agreement documented through a signed form.
29.Negligence - ANSWER ✔ The neglect or omission of reasonable care or
caution, judged against the standard of a reasonably prudent person.
30.Chart - ANSWER ✔ Refers to the comprehensive compilation of patient
information, now primarily in digital format as an electronic medical record
(EMR) or e-chart.
31.Res ipsa loquitur - ANSWER ✔ A doctrine applied when negligence and
loss are obvious, meaning 'the thing speaks for itself.'
