- 1. Medical physics is a multidisciplinary field that involves the application of physics principles and techniques to medicine. Medical physicists work alongside healthcare professionals to ensure the safe and effective use of medical technology in diagnosis, treatment, and research. They are involved in the development and maintenance of medical imaging equipment such as X-ray machines, CT scanners, and MRI machines, as well as in the planning and delivery of radiation therapy for cancer patients. Medical physicists also play a key role in quality assurance and radiation safety, helping to optimize imaging procedures and treatment plans to minimize patient exposure to radiation while maximizing diagnostic accuracy and therapeutic outcome. Overall, the work of medical physicists is critical to the advancement of medical care and the well-being of patients.
What is the SI unit of measurement for dose absorbed by an object or person?
A) Joule (J)
B) Tesla (T)
C) Sievert (Sv)
D) Gray (Gy)
- 2. What does PET stand for in medical imaging?
A) Positron Emission Tomography
B) Particle Energy Treatment
C) Photoelectric Transmission
D) Photon Emission Test
- 3. Which imaging modality uses sound waves to create images of the body's internal structures?
A) CT scan
B) X-ray
C) Ultrasound
D) MRI
- 4. What is the process by which unstable atomic nuclei lose energy known as?
A) Ionization
B) Fusion
C) Radioactive decay
D) Fission
- 5. Which type of radiation can be shielded by a sheet of paper?
A) Neutrons
B) Alpha radiation
C) Beta radiation
D) Gamma rays
- 6. Which imaging technique uses magnetic fields and radio waves to create detailed images of the body?
A) CT scan
B) PET scan
C) X-ray
D) MRI (Magnetic Resonance Imaging)
- 7. What does CT stand for in CT scan imaging?
A) Computed Tomography
B) Continuous Transmission
C) Cross Test
D) Closed Tube
- 8. What does MRI stand for in medical imaging?
A) Magnetic Resonance Imaging
B) Medical Radiation Inspection
C) Magnetic Radiation Instrument
D) Microscopic Radiation Indicator
- 9. What is the phenomenon in which a material emits light when exposed to radiation?
A) Bioluminescence
B) Incandescence
C) Phosphorescence
D) Fluorescence
- 10. Which type of radiation consists of fast-moving electrons?
A) Neutrons
B) Alpha radiation
C) Beta radiation
D) Gamma rays
- 11. What is the unit of electrical resistance?
A) Volt
B) Ampere
C) Watt
D) Ohm
- 12. In medical imaging, what do the letters 'DICOM' stand for?
A) Digital Imaging and Communications in Medicine
B) Direct Imaging with Computerized Open Monitoring
C) Dynamic Imaging and Communication Oriented Machine
D) Diagnostic Imaging and Computerized Online Modality
- 13. What is the process by which two atomic nuclei combine to form a heavier nucleus and release energy?
A) Nuclear fission
B) Radioactive decay
C) Positron emission
D) Nuclear fusion
- 14. What is the unit of measurement for the amount of electrical charge flowing through a circuit per unit time?
A) Watt (W)
B) Volt (V)
C) Ohm (Ω)
D) Ampere (A)
- 15. In which imaging technique is a contrast agent often used to enhance visualization of blood vessels and organs?
A) Cystoscopy
B) Endoscopy
C) Colonoscopy
D) Angiography
- 16. Which device is commonly used to measure the radiation exposure of personnel working in medical radiography?
A) Tonometer
B) Dosimeter
C) Sphygmomanometer
D) Pulse oximeter
- 17. What phenomenon is responsible for the change in frequency of a wave as the source and observer move towards or away from each other?
A) Compton effect
B) Photoelectric effect
C) Doppler effect
D) Pair production
- 18. What term refers to the ability of an imaging system to distinguish between objects with small differences in density?
A) Gray scale
B) Contrast resolution
C) Spatial resolution
D) Temporal resolution
- 19. Which of the following is an example of a phobia associated with radiation?
A) Beta-phobia
B) Gamma-phobia
C) X-ray-phobia
D) Radiophobia
- 20. Which type of radiation has the highest energy?
A) Gamma rays
B) X-rays
C) Beta particles
D) Alpha particles
- 21. What is the principle behind the functioning of a CT scanner?
A) Particles are emitted to create images
B) Magnetic fields are used to create images
C) Ultrasound waves are used to create images
D) X-rays are used to create cross-sectional images
- 22. What is the unit of radiation dose equivalent that accounts for the biological effect of different types of ionizing radiation?
A) Coulomb
B) Sievert
C) Rem
D) Gray
- 23. What is the process of converting a material into ionized particles called?
A) Radiolysis
B) Excitation
C) Ionization
D) Decay
- 24. In radiation protection, what does ALARA stand for?
A) Averting Lethal Atomic Radiation Accidents
B) As Low As Reasonably Achievable
C) Always Limiting All Radiation Acts
D) Avoiding Long-term Adverse Radiation Adherence
- 25. What property of a lens determines how much it converges or diverges light?
A) Focal length
B) Thickness
C) Material
D) Diameter
- 26. What is the energy associated with motion called?
A) Potential energy
B) Thermal energy
C) Mechanical energy
D) Kinetic energy
- 27. What is the unit of measurement for the intensity of sound?
A) Joule
B) Ohm
C) Decibel
D) Hertz
- 28. Which imaging modality is commonly used to detect breast cancer in its early stages?
A) Bronchoscopy
B) Angiography
C) Mammography
D) Colonoscopy
- 29. Which type of radiation has the longest wavelength?
A) Ultraviolet
B) Gamma Rays
C) Radio Waves
D) X-rays
- 30. What is the SI unit of magnetic field strength used in MRI?
A) Tesla
B) Celsius
C) Joule
D) Hertz
- 31. What is the SI unit of energy?
A) Joule
B) Ohm
C) Watt
D) Newton
- 32. What is the speed of light in a vacuum?
A) 10,000 meters per second
B) 100 kilometers per hour
C) 1,000 miles per hour
D) 299,792,458 meters per second
- 33. What is the SI unit of force?
A) Watt
B) Volt
C) Newton
D) Joule
- 34. Which property of sound waves is related to pitch?
A) Wavelength
B) Frequency
C) Velocity
D) Amplitude
- 35. Which device is used to measure an electric current?
A) Ohmmeter
B) Ammeter
C) Wattmeter
D) Voltmeter
- 36. What does BMR stand for in exercise physiology?
A) Basal Metabolic Rate
B) Biochemical Molecular Response
C) Body Mass Ratio
D) Caloric Intake Index
- 37. What is the phenomenon where light waves change direction due to a change in medium?
A) Polarization
B) Diffraction
C) Refraction
D) Reflection
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