SSC Radiographer Exam Model Questions MCQs For Practice : SSC, UPSC, AIIMS
1. Which of the following imaging techniques uses X-rays to generate images of the human body's internal structures?
a) MRI
b) PET scan
c) CT scan
d) Ultrasound
Answer : c) CT scan
2. Which of the following elements is commonly used as a contrast agent in certain types of medical imaging ?
a) Oxygen
b) Iodine
c) Nitrogen
d) Carbon
Answer : b) Iodine
3. In radiography, what is the purpose of a radiopaque marker ?
a) To indicate the patient's name
b) To identify the type of X-ray machine used
c) To mark the area of interest on the patient's body
d) To identify the left or right side of the image
Answer : d) To identify the left or right side of the image
4. Which radiation protection principle states that the amount of radiation exposure should be limited to the minimum necessary to achieve the desired diagnostic information?
a) Time
b) Distance
c) Shielding
d) ALARA principle
Answer : d) ALARA principle (As Low As Reasonably Achievable)
5. What unit is used to measure radiation exposure in the International System of Units (SI)?
a) Sievert (Sv)
b) Gray (Gy)
c) Becquerel (Bq)
d) Roentgen (R)
Answer : b) Gray (Gy)
6. Which of the following X-ray views is commonly used to detect fractures of the wrist?
a) AP view
b) Lateral view
c) Oblique view
d) Tunnel view
Answer : b) Lateral view
7. Which type of radiation has the highest energy and can penetrate most materials?
a) Gamma rays
b) Beta particles
c) Alpha particles
d) Neutrons
Answer : a) Gamma rays
8. What is the primary purpose of a lead apron worn during X-ray procedures?
a) To protect against electric shocks
b) To shield against scattered radiation
c) To enhance image quality
d) To prevent contamination
Answer : b) To shield against scattered radiation
9. In ultrasound imaging, what does the transducer do?
a) Generates X-rays
b) Produces sound waves
c) Captures magnetic resonance images
d) Measures radiation intensity
Answer : b) Produces sound waves
10 What is the function of the grid used in radiography?
a) To calibrate the X-ray machine
b) To enhance the contrast of the image
c) To measure radiation exposure
d) To reduce scatter radiation
Answer : d) To reduce scatter radiation
11. Which of the following is a common radiopharmaceutical used in nuclear medicine imaging?
a) Iodine-125
b) Barium sulfate
c) Gadolinium contrast agent
d) Technetium-99m
Answer : d) Technetium-99m
12. Which imaging technique utilizes strong magnetic fields and radio waves to generate images of the body?
a) PET scan
b) Ultrasound
c) MRI
d) CT scan
Answer : c) MRI
13. What is the unit used to measure the absorbed dose of radiation in biological tissue?
a) Gray (Gy)
b) Sievert (Sv)
c) Curie (Ci)
d) Roentgen (R)
Answer : a) Gray (Gy)
14. Which part of the electromagnetic spectrum is used in mammography?
a) Infrared
b) Ultraviolet
c) Microwave
d) X-rays
Answer : d) X-rays
15. What does PACS stand for in the context of radiology ?
a) Picture Archiving and Communication System
b) Personal Automated Computed System
c) Primary Assessment and Control System
d) Patient Accessible Communication System
Answer : a) Picture Archiving and Communication System
16. Which imaging technique is commonly used to examine blood vessels and detect blockages or abnormalities?
a) Fluoroscopy
b) Angiography
c) Mammography
d) Nuclear medicine imaging
Answer : b) Angiography
17. What is the purpose of a scintillation detector in nuclear medicine imaging ?
a) To produce X-rays
b) To generate sound waves
c) To detect and measure radiation
d) To create magnetic fields
Answer : c) To detect and measure radiation
18. Which term refers to the ability of an imaging system to distinguish between objects with different densities ?
a) Resolution
b) Sensitivity
c) Contrast
d) Specificity
Answer : c) Contrast
19. What is the half-life of a radioactive substance?
a) The time it takes for the substance to decay to half of its original quantity
b) The time it takes for the substance to become non-radioactive
c) The time it takes for the substance to reach its peak radioactivity
d) The time it takes for the substance to decay completely
Answer : a) The time it takes for the substance to decay to half of its original quantity
20. Which type of radiation is typically used in radiotherapy to treat cancer ?
a) Alpha particles
b) Beta particles
c) Gamma rays
d) Neutrons
Answer : c) Gamma rays
21. What is the purpose of a collimator in radiography?
a) To control the radiation dose
b) To focus the X-ray beam
c) To generate contrast in the image
d) To display the patient's information
Answer : b) To focus the X-ray beam
22. Which imaging technique is commonly used to visualize soft tissues, such as tendons and ligaments?
a) MRI
b) PET scan
c) CT scan
d) Ultrasound
Answer : a) MRI
23. What type of image does a fluoroscopy procedure produce?
a) Still image
b) Three-dimensional image
c) Real-time moving image
d) Infrared image
Answer : c) Real-time moving image
24. In nuclear medicine imaging, what does SPECT stand for?
a) Single Photon Emission Computed Tomography
b) Sequential Photographic Emission Collection Technique
c) Sensory Position Emission Computerized Tomography
d) Synchronized Photon Emission Capture
Answer : a) Single Photon Emission Computed Tomography
25. Which imaging technique uses radiofrequency waves and a strong magnetic field to produce detailed images of the body's internal structures?
a) PET scan
b) X-ray
c) MRI
d) Ultrasound
Answer : c) MRI
26. What is the purpose of the phosphor plate in digital radiography?
a) To convert X-rays into electrical signals
b) To capture the X-ray image digitally
c) To enhance the contrast of the image
d) To shield against radiation
Answer : b) To capture the X-ray image digitally
27. Which of the following materials is commonly used as a contrast agent in MRI scans?
a) Gadolinium
b) Barium
c) Iodine
d) Technetium
Answer : a) Gadolinium
28. What is the unit used to measure the activity of a radioactive substance?
a) Sievert (Sv)
b) Becquerel (Bq)
c) Gray (Gy)
d) Roentgen (R)
Answer : b) Becquerel (Bq)
29. Which term refers to the reduction in the intensity of an X-ray beam as it passes through tissues?
a) Attenuation
b) Absorption
c) Scattering
d) Transmission
Answer : a) Attenuation
30. Which imaging technique is often used to diagnose conditions related to the digestive system by swallowing or injecting a contrast material?
a) MRI
b) Fluoroscopy
c) CT scan
d) Ultrasound
Answer : b) Fluoroscopy
31. In radiography, what is the purpose of the developer solution in film processing ?
a) To fix the image on the film
b) To convert X-rays into visible light
c) To enhance image contrast
d) To remove unexposed silver halide crystals
Answer : d) To remove unexposed silver halide crystals
32. What is the primary purpose of a lead-lined room in radiography?
a) To store medical records safely
b) To protect against electromagnetic interference
c) To shield against radiation exposure
d) To ensure patient comfort
Answer : c) To shield against radiation exposure
33. Which of the following is a common application of PET-CT imaging?
a) Studying bone fractures
b) Monitoring brain activity
c) Examining lung function
d) Analyzing kidney stones
Answer : b) Monitoring brain activity
34. Which component of an X-ray machine is responsible for producing X-rays?
a) Cathode
b) Anode
c) Transformer
d) Collimator
Answer : b) Anode
35. What is the purpose of the grid in a mammography machine?
a) To reduce scattered radiation
b) To increase the X-ray dose
c) To magnify the image
d) To improve patient comfort
Answer : a) To reduce scattered radiation
36. In radiation safety, what does ALARA stand for?
a) As Low As Reasonably Achievable
b) Advanced Lead Absorption Radiation Assessment
c) Avoiding Long-term Acute Radiation Adverse effects
d) Acceptable Levels of Radiation Avoidance
Answer : a) As Low As Reasonably Achievable
37. What does the term "echogenic" refer to in ultrasound imaging?
a) Ability to absorb sound waves
b) Ability to generate sound waves
c) Ability to produce echoes
d) Ability to transmit sound waves
Answer : c) Ability to produce echoes
38. Which type of imaging technique involves the use of radioactive tracers to detect metabolic activity in the body?
a) MRI
b) PET scan
c) CT scan
d) Ultrasound
Answer : b) PET scan
39. What is the purpose of the image intensifier in fluoroscopy?
a) To increase radiation exposure
b) To amplify and enhance the X-ray image
c) To reduce image resolution
d) To capture static images
Answer : b) To amplify and enhance the X-ray image
40. Which unit is used to measure the equivalent dose of radiation, taking into account its biological effects?
a) Gray (Gy)
b) Sievert (Sv)
c) Curie (Ci)
d) Roentgen (R)
Answer : b) Sievert (Sv)
41. Which of the following imaging techniques uses sound waves to produce images of organs inside the body?
a) PET scan
b) MRI
c) Ultrasound
d) Fluoroscopy
Answer : c) Ultrasound
42. What is the purpose of a radiographic grid in X-ray imaging?
a) To focus the X-ray beam
b) To reduce scatter radiation
c) To increase patient comfort
d) To control the radiation dose
Answer : b) To reduce scatter radiation
43. Which part of the X-ray machine converts electrical energy into X-rays?
a) Anode
b) Cathode
c) Transformer
d) Collimator
Answer : a) Anode
44. In radiography, what does the term "mAs" refer to?
a) Energy of X-rays
b) Number of X-ray photons produced
c) Time duration of X-ray exposure
d) Tube current and exposure time
Answer : d) Tube current and exposure time
45. Which imaging technique uses a rotating X-ray tube to create detailed cross-sectional images of the body?
a) Ultrasound
b) MRI
c) CT scan
d) Fluoroscopy
Answer : c) CT scan
46. What is the primary function of a radiopaque contrast medium used in certain X-ray procedures?
a) To increase radiation exposure
b) To reduce image contrast
c) To outline specific body structures
d) To minimize patient discomfort
46. c) To outline specific body structures
47. Which safety measure is crucial during fluoroscopy to limit radiation exposure to patients and staff?
a) Increasing exposure time
b) Using lead aprons and shields
c) Decreasing the distance from the X-ray source
d) Employing higher radiation doses
Answer : b) Using lead aprons and shields
48. What is the primary purpose of a radiopharmaceutical in nuclear medicine imaging?
a) To shield against radiation
b) To enhance image resolution
c) To create radioactive waves
d) To deliver a radioactive tracer to the body
Answer : d) To deliver a radioactive tracer to the body
49. Which term describes the ability of an imaging system to differentiate between tissues with varying densities ?
a) Resolution
b) Sensitivity
c) Specificity
d) Contrast
Answer : d) Contrast
50. In radiography, what does the term "SID" stand for?
a) Source-to-Impact Distance
b) Source-to-Image Distance
c) Scattering in Diagnostic imaging
d) Shielding and Image Development
Answer : b) Source-to-Image Distance
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