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Radiography Questions

45 Questions
Radiography Quizzes & Trivia

Level 1 Radiography test - 135+ multiple choice questions

Questions and Answers
  • 1. 
    Although there may be other reasons for using calcium tungstate screens in industrial radiography, they are most usually used to:
    • A. 

      Improve definition and resolution in radiographic images

    • B. 

      Improve contrast in radiographic images

    • C. 

      Decrease exposure time

    • D. 

      Make films respond to multimillion volt radiation

  • 2. 
    • A. 

      Unchanged

    • B. 

      Longer by approximately 80 percent

    • C. 

      Shorter by approximately 55 percent

    • D. 

      Only about 25 percent as long as the original exposure time

  • 3. 
    • A. 

      24 minutes

    • B. 

      12 minutes

    • C. 

      6 minutes

    • D. 

      3 minutes

  • 4. 
    In film radiography, penetrameters are usually placed:
    • A. 

      Between the intensifying screen and the film

    • B. 

      On the source side of the test object

    • C. 

      On the film side of the test object

    • D. 

      Between the operator and the radiation source

  • 5. 
    • A. 

      1/2 inch

    • B. 

      2 mils

    • C. 

      5 mils

    • D. 

      10 mils

  • 6. 
    The penetrating ability of an X-ray beam is governed by:
    • A. 

      Kilovoltage or wavelength

    • B. 

      Time

    • C. 

      Milliamperage

    • D. 

      Source-to-film distance

  • 7. 
    Cobalt-60 used in nondestructive testing emits:
    • A. 

      Alpha particles

    • B. 

      Neutrons

    • C. 

      Gamma rays

    • D. 

      X rays

  • 8. 
    A densitometer is:
    • A. 

      A meter used to measure X-ray intensity

    • B. 

      An instrument for measuring film density

    • C. 

      A meter used to measure the density of a material

    • D. 

      A meter used to measure tube current

  • 9. 
    Three liquids which are essential to process an exposed film properly are:
    • A. 

      Stop batch, acetic acid, and water

    • B. 

      Developer, stop bath, and H2O2

    • C. 

      Developer, fixer, and water

    • D. 

      Acetic acid, fixer, and stop bath

  • 10. 
    • A. 

      Insufficient washing and overdevelopment

    • B. 

      Contaminated fixer and insufficient washing

    • C. 

      Overexposure and contaminated fixer

    • D. 

      Overexposure and overdevelopment

  • 11. 
    • A. 

      The inverse square law

    • B. 

      A curie

    • C. 

      A half-life

    • D. 

      The exposure time

  • 12. 
    • A. 

      Radiation limits for humans

    • B. 

      Roentgens per hour

    • C. 

      X rays per hour

    • D. 

      Radiation in hydrogen

  • 13. 
    The ability to detect a small discontinuity or flaw is called:
    • A. 

      Radiographic contrast

    • B. 

      Radiographic sensitivity

    • C. 

      Radiographic density

    • D. 

      Radiographic resolution

  • 14. 
    Movement, geometry, and screen contact are three factors that affect radiographic:
    • A. 

      Contrast

    • B. 

      Unsharpness

    • C. 

      Reticulation

    • D. 

      Density

  • 15. 
    The difference between the densities of two areas of a radiograph is called:
    • A. 

      Radiographic contrast

    • B. 

      Subject contrast

    • C. 

      Film contrast

    • D. 

      Definition Definition

  • 16. 
    Upon completing an X-ray exposure and turning the equipment off:
    • A. 

      Personnel should wait for a few minutes before entering the exposure area

    • B. 

      Personnel should wear a lead-lined apron before entering-the exposure area

    • C. 

      Personnel should enter the exposure area without fear of radiation exposure

    • D. 

      Personnel should take a reading with a survey meter before entering the exposure area.

  • 17. 
    The most widely used unit of measurement for measuring the rate at which the output of a gamma-ray source decays is the:
    • A. 

      Curie

    • B. 

      Roentgen

    • C. 

      Half-life

    • D. 

      MeV

  • 18. 
    Exposure to X rays or gamma rays:
    • A. 

      May have a cumulative effect which must be considered when monitoring for maximum permissible dose

    • B. 

      Will be beneficial since they build up an immunity to radiation poisoning

    • C. 

      Will have no effect on human beings

    • D. 

      Will have only a short-t€rm effect on human tissues

  • 19. 
    Which dose would be dangerous, if not fatal, if applied to the entire body in a short period of time:
    • A. 

      1.5 to 15 R

    • B. 

      25 to 70 R

    • C. 

      200 to 800 R

    • D. 

      All of the above doses would most likely be fatal

  • 20. 
    • A. 

      Directly by personnel equipped with special protective clothing with speciar protective clothing.

    • B. 

      By remote handling equipment

    • C. 

      Directly by personnel with special protective clothing except when radiographs are being made

    • D. 

      By the same methods used for low intensity emitters

  • 21. 
    • A. 

      The radiograph will not show proper contrast

    • B. 

      It will be impossible to fix the radiograph permanently

    • C. 

      There will be a general "fogging" condition over the entire radiograph

    • D. 

      There will be a tendency for each area of the film to affect the development of the areas immediately below it

  • 22. 
    The selection of the proper type of film to be used for the X-ray examination of a particular part depends on:
    • A. 

      The thickness of the part

    • B. 

      The material of the specimen

    • C. 

      The voltage range of the available X-ray machine

    • D. 

      All three of the above factors

  • 23. 
    When radiographing a part which contains a large crack, the crack will appear on the radiograph as:
    • A. 

      A dark, intermittent or continuous line

    • B. 

      A light, irregular line

    • C. 

      Either a dark or light line

    • D. 

      A fogged area on the radiograph

  • 24. 
    A cobalt-60 source has a half-life of
    • A. 

      1.2 years

    • B. 

      6 months

    • C. 

      5.3 years

    • D. 

      75 days

  • 25. 
    • A. 

      The current passing through the filament (cathode)

    • B. 

      The distance from the cathode to the anode

    • C. 

      The type of material used in the target

    • D. 

      The voltage and waveform applied to-the X-ray tube

  • 26. 
    • A. 

      Quantity of radiation

    • B. 

      Duration of exposure

    • C. 

      Penetrating ability

    • D. 

      X-ray beam divergence

  • 27. 
    Lead foil in direct contact with X-ray film:
    • A. 

      Intensifies the scatter radiation more than the primary radiation

    • B. 

      Decreases the contrast of the radiographic image

    • C. 

      Intensifies the primary radiation more than the scatter radiation

    • D. 

      Should not be used when gamma rays are emitted by the source of radiation

  • 28. 
    Fluorescent intensifying screens are usually mounted in pairs in rigid holders called:
    • A. 

      Film racks

    • B. 

      Cassettes

    • C. 

      Emulsifiers

    • D. 

      Diaphragms

  • 29. 
    Radiographic sensitivity, in the context of the minimum detectable flaw size, depends on:
    • A. 

      Graininess of the film

    • B. 

      The unsharpness of the flaw image in the film

    • C. 

      The contrast of the flaw image on the film

    • D. 

      All three of the above

  • 30. 
    In order to decrease geometric unsharpness:
    • A. 

      Radiation should proceed from as small a focal spot as other considerations will allow

    • B. 

      Radiation should proceed from as large a focal spot as other considerations will allow.

    • C. 

      The film should be as far as possible from the object being radiographed

    • D. 

      The distance from the anode to the material examined should be as small as is practical.

  • 31. 
    As the kilovoltage applied to the X-ray tube is raised:
    • A. 

      X rays of longer wavelength and more penetrating power are produced

    • B. 

      X rays of shorter wavelength and more penetrating power are produced

    • C. 

      X rays of shorter wavelength and less penetrating power are produced

    • D. 

      X rays of longer wavelength and less penetrating power are produced

  • 32. 
    In order to increase the intensity of X-radiation:
    • A. 

      The tube current should be increased

    • B. 

      The tube current should be decreased

    • C. 

      The test specimen should be moved further from the film.

    • D. 

      A lower kilovoltage should be applied to the tube

  • 33. 
    • A. 

      Radiation imaging

    • B. 

      Spotting

    • C. 

      Undercut

    • D. 

      Unsharpness

  • 34. 
    Scattered radiation caused by any material, such as a wall or floor, table top, or cassette that is located in back of the film is known as:
    • A. 

      Primary scattering

    • B. 

      Undercut

    • C. 

      Reflected scattering

    • D. 

      Backscattered radiation

  • 35. 
    Which of the following materials is suitable for use in vessels or pails used to mix processing solutions:
    • A. 

      Stainless steel

    • B. 

      Aluminum

    • C. 

      Galvanized iron

    • D. 

      Tin

  • 36. 
    Any of the body tissues may be injured by excessive exposure to X or gamma rays but particularly sensitive are:
    • A. 

      Blood

    • B. 

      Lens of the eye

    • C. 

      Internal organs

    • D. 

      All of the above

  • 37. 
    A general rule used to define the amount of radiation exposure that is excessive is:
    • A. 

      Although small amounts of radiation (0.4 R per week or less) are beneficial since they build up an immunity to these rays, anything above 0.4 R per week is excessive

    • B. 

      Any dose over 5 R per week is excessive

    • C. 

      Any dose which causes a mid-range reading on a Geiger counter is excessive

    • D. 

      Any unnecessary exposure to radiation is excessive

  • 38. 
    X-ray exposure may be due to:
    • A. 

      The direct beam from the X-ray tube target

    • B. 

      Scatter radiation arising from the object in the direct beam

    • C. 

      Both A and B above

    • D. 

      Both A and B above plus residual radiation that exists for the first few minutes after the X-ray machine has been returned to the "off" position

  • 39. 
    • A. 

      The kilovoltage should be as high as other factors will permit

    • B. 

      The kilovoltage should be as low as other factors will permit

    • C. 

      The kilovoltage is always a fixed value and cannot be changed

    • D. 

      The kilovoltage is not an important variable and can be changed over a wide range without affecting the radiograph

  • 40. 
    • A. 

      One-third

    • B. 

      One-quarter

    • C. 

      One-half

    • D. 

      Three-quarters

  • 41. 
    • A. 

      A foggy film

    • B. 

      Poor definition

    • C. 

      Streaks

    • D. 

      Yellow stain

  • 42. 
    White crescent-shaped marks on an exposed X-ray film are most likely caused by:
    • A. 

      Crimping film after exposure

    • B. 

      Crimping film before exposure

    • C. 

      Sudden extreme temperature change while processing

    • D. 

      Warm of exhausted fixer

  • 43. 
    Reticulation resulting in a puckered or netlike film surface is probably caused by:
    • A. 

      Crimping film after exposure

    • B. 

      Sudden extreme temperature change while processing

    • C. 

      Water or developer on unprocessed film

    • D. 

      Excessive object-to-film distance

  • 44. 
    Frilling or loosening of the emulsion from the base of the film is most likely caused by:
    • A. 

      Water of developer on unprocessed film

    • B. 

      Low temperature of processing solutions

    • C. 

      Developer solution contamination

    • D. 

      Warm or exhausted fixer solution

  • 45. 
    • A. 

      120 seconds

    • B. 

      30 seconds

    • C. 

      15 seconds

    • D. 

      240 seconds