Page 1 of 117
LMRT STATE EXAM REAL EXACT EXAM FINAL PAPER WITH
ANSWER KEYS AND DETAILED RATIONALES
Radiologic Technology / Radiography / Medical Imaging
Exam summary :
• Section 1 (Q1-25): X-Ray Physics & Tube Operation
• Section 2 (Q26-55): Radiation Protection & Patient Safety
• Section 3 (Q56-80): Image Production & Quality
• Section 4 (Q81-100): Patient Care & Medical Emergencies
• Section 5 (Q101-115): Digital & Advanced Imaging
• Section 6 (Q116-130): Legal & Regulatory Standards
• Section 7 (Q131-150): Anatomy & Positioning
QUESTIONS :
Section 1: X-Ray Physics & Tube Operation (Questions 1-25)
Sources: LMRT State Exam curriculum, radiographic physics
standards.
1. What is the correct material used for the filament and the
target/anode in an X-ray tube?
A) Tungsten for both the filament and the target
B) Molybdenum for the filament and tungsten for the target
, Page 2 of 117
C) Tungsten for the filament and molybdenum for the target
D) Copper for the filament and tungsten for the target
CORRECT: A
RATIONALE: Tungsten is used for both the filament and the
target because it has a high melting point (3370°C) and good
thermionic emission properties .
2. The high-speed rotation of the anode in modern X-ray tubes
allows for:
A) A smaller focal spot size
B) Greater dissipation of heat from high technical factors
C) Increased patient dose
D) Higher penetration of the X-ray beam
CORRECT: B
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RATIONALE: High-speed rotation (typically 10,000 rpm) helps
dissipate heat efficiently, allowing the use of high technical
factors without damaging the anode .
3. The degree of angulation of the X-ray tube target determines
the:
A) Kilovoltage peak (kVp) of the beam
B) Size of the actual and effective focal spot
C) Quantity of X-ray photons produced
D) Filtration of the X-ray beam
CORRECT: B
RATIONALE: Target angulation influences the size of both the
actual focal spot (on the target) and the effective focal spot
(projected toward the patient), with the line focus principle .
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4. A dual-focus X-ray tube has which of the following
components? 1: Two filaments 2: Two focal spot sizes 3: Two
anodes
A) 1 only
B) 2 only
C) 1 and 2
D) 1, 2, and 3
CORRECT: C
RATIONALE: A dual-focus tube has two filaments to provide
large and small focal spot sizes .
5. The anode heel effect is a phenomenon of X-ray production
that results in:
A) Increased patient dose
LMRT STATE EXAM REAL EXACT EXAM FINAL PAPER WITH
ANSWER KEYS AND DETAILED RATIONALES
Radiologic Technology / Radiography / Medical Imaging
Exam summary :
• Section 1 (Q1-25): X-Ray Physics & Tube Operation
• Section 2 (Q26-55): Radiation Protection & Patient Safety
• Section 3 (Q56-80): Image Production & Quality
• Section 4 (Q81-100): Patient Care & Medical Emergencies
• Section 5 (Q101-115): Digital & Advanced Imaging
• Section 6 (Q116-130): Legal & Regulatory Standards
• Section 7 (Q131-150): Anatomy & Positioning
QUESTIONS :
Section 1: X-Ray Physics & Tube Operation (Questions 1-25)
Sources: LMRT State Exam curriculum, radiographic physics
standards.
1. What is the correct material used for the filament and the
target/anode in an X-ray tube?
A) Tungsten for both the filament and the target
B) Molybdenum for the filament and tungsten for the target
, Page 2 of 117
C) Tungsten for the filament and molybdenum for the target
D) Copper for the filament and tungsten for the target
CORRECT: A
RATIONALE: Tungsten is used for both the filament and the
target because it has a high melting point (3370°C) and good
thermionic emission properties .
2. The high-speed rotation of the anode in modern X-ray tubes
allows for:
A) A smaller focal spot size
B) Greater dissipation of heat from high technical factors
C) Increased patient dose
D) Higher penetration of the X-ray beam
CORRECT: B
, Page 3 of 117
RATIONALE: High-speed rotation (typically 10,000 rpm) helps
dissipate heat efficiently, allowing the use of high technical
factors without damaging the anode .
3. The degree of angulation of the X-ray tube target determines
the:
A) Kilovoltage peak (kVp) of the beam
B) Size of the actual and effective focal spot
C) Quantity of X-ray photons produced
D) Filtration of the X-ray beam
CORRECT: B
RATIONALE: Target angulation influences the size of both the
actual focal spot (on the target) and the effective focal spot
(projected toward the patient), with the line focus principle .
, Page 4 of 117
4. A dual-focus X-ray tube has which of the following
components? 1: Two filaments 2: Two focal spot sizes 3: Two
anodes
A) 1 only
B) 2 only
C) 1 and 2
D) 1, 2, and 3
CORRECT: C
RATIONALE: A dual-focus tube has two filaments to provide
large and small focal spot sizes .
5. The anode heel effect is a phenomenon of X-ray production
that results in:
A) Increased patient dose
