MHMS • 2026 • Paper-IV (Technical Paper - II)
Which type of lung cancer is more radioresistant?
A)
Small cell lung carcinoma
B)
Non-small cell lung carcinoma
C)
Adenocarcinoma of the lung
D)
Squamous cell carcinoma of the lung
Option B is correct: Non-small cell lung carcinoma.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The main purpose of quality assurance (QA) in radiotherapy is to:
A)
Reduce the number of treatment sessions
B)
Ensure safe, accurate, and consistent delivery of radiation
C)
Replace fractionation
D)
Only check patient positioning
Option B is correct: Ensure safe, accurate, and consistent delivery of radiation.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Iridium-192 has a half-life of approximately:
A)
73. 83days
B)
78 days
C)
5.7 years
D)
4 years
Option A is correct: 73. 83days.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The main role of a radiotherapy technologist in emergencies is:
A)
Immediate reporting and patient care support
B)
Prescribing medicine
C)
Performing surgery
D)
Diagnosing disease
Option A is correct: Immediate reporting and patient care support.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Which of the following devices is commonly used for shaping electron fields?
A)
Cerrobend cutouts
B)
MLC
C)
Bolus only
D)
Lead filter
Option B is correct: MLC.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Fractionation in radiotherapy refers to:
A)
Splitting tumor into parts
B)
Dividing total radiation dose into multiple smaller doses
C)
Using multiple beams simultaneously
D)
Calculating tumor size
Option B is correct: Dividing total radiation dose into multiple smaller doses.
MHMS • 2026 • Paper-IV (Technical Paper - II)
If one HVL of a material reduces radiation intensity to 50%, two HVLs will reduce it to:
A)
25%
B)
50%
C)
75%
D)
10%
Option A is correct: 25%.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The door of a teletherapy bunker usually shields against:
A)
Primary beam
B)
Secondary radiation
C)
Ultrasound waves
D)
Magnetic fields
Option C is correct: Ultrasound waves.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Which of the following is an example of early radiation reaction?
A)
Skin erythema
B)
Fibrosis
C)
Cataract
D)
Infertility
Option A is correct: Skin erythema.
MHMS • 2026 • Paper-IV (Technical Paper - II)
A standard electrometer is usually connected with:
A)
Ionization chamber
B)
Linear Accelerator
C)
Surgery monitoring devices
D)
Thermometer
Option A is correct: Ionization chamber.
MHMS • 2026 • Paper-IV (Technical Paper - II)
VMAT can deliver treatment in:
A)
One or multiple arcs
B)
Only one direction
C)
Only two beams
D)
No rotation
Option A is correct: One or multiple arcs.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The annual effective dose limit for the general public is:
A)
20 mSv
B)
10 mSv
C)
1 mSv
D)
50 mSv
Option C is correct: 1 mSv.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Soft tissue sarcomas arise from:
A)
Epithelial tissue
B)
Connective tissue
C)
Blood cells
D)
Nerve cells
Option B is correct: Connective tissue.
MHMS • 2026 • Paper-IV (Technical Paper - II)
An ionization chamber works on the principle of:
A)
Ionization of gas by radiation
B)
Measurement of radiation dose
C)
High sensitivity to radiation
D)
Ultrasound imaging
Option B is correct: Measurement of radiation dose.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The risk of infection is highest when there is:
A)
Needle stick injury
B)
Eye contact
C)
Speaking to patient
D)
Walking in ward
Option B is correct: Eye contact.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Adjuvant chemotherapy is given:
A)
Before surgery
B)
After surgery
C)
Only for metastatic disease
D)
Only in benign tumors
Option B is correct: After surgery.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Most head and neck cancers spread primarily through:
A)
Blood vessels
B)
Lymphatic system
C)
Nervous system
D)
Muscles
Option B is correct: Lymphatic system.
MHMS • 2026 • Paper-IV (Technical Paper - II)
According to the Inverse Square Law, if distance from the source is doubled, radiation intensity becomes:
A)
Two times
B)
Half
C)
One-fourth
D)
Four times
Option C is correct: One-fourth.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Somatic effects of radiation occur in:
A)
The exposed individual only
B)
Future generations
C)
Plants only
D)
Animals only
Option A is correct: The exposed individual only.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The part of the brain responsible for coordination and balance is:
A)
Cerebrum
B)
Cerebellum
C)
Brainstem
D)
Medulla
Option B is correct: Cerebellum.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Calibration in radiotherapy is mainly performed to ensure:
A)
Faster treatment delivery
B)
Accurate radiation dose output
C)
Overdose or underdose to the patient
D)
Protect patient and staff safety
Option B is correct: Accurate radiation dose output.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The effectiveness of radiation therapy depends mainly on:
A)
Radiation dose
B)
Oxygen level
C)
Cell type
D)
All of the above
Option D is correct: All of the above.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Melanoma is:
A)
Highly radiosensitive
B)
Radioresistant
C)
Radiosensitive in all stages
D)
Treated only with superficial RT
Option A is correct: Highly radiosensitive.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Bony matching is commonly used because bones are:
A)
Stable anatomical landmarks
B)
Invisible in imaging
C)
Always moving
D)
Not visible on CT
Option A is correct: Stable anatomical landmarks.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Shielding thickness of bunker walls depends on:
A)
Radiation energy
B)
Workload of machine
C)
Distance from source
D)
All of the above
Option A is correct: Radiation energy.
