RHS Exam Study Guide

166 Questions | Total Attempts: 13677

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RHS Exam Study Guide - Quiz

Are you preparing for the Radiation Health and Safety (RHS) exam? Want to revise your concepts with this RHS Practice Test that is given here for free? Give it a try, and we assure you that you'll find this test very useful. The RHS exam is conducted by the Dental Assisting National Board (DANB) as a way for candidates to demonstrate their expertise in the proper safety procedures for taking x-rays. If you think you know everything about this topic, then try the quiz given here.


Questions and Answers
  • 1. 
    The film emulsion is hardened during ______. 
    • A. 

      Development

    • B. 

      Rinsing

    • C. 

      Fixation

    • D. 

      Washing

    • E. 

      Drying

  • 2. 
    A higher kilovoltage produces x-rays with:
    • A. 

      Greater energy levels

    • B. 

      Shorter wavelengths

    • C. 

      More penetrating ability

    • D. 

      All of the above

  • 3. 
    Which of the following is not found on the label of the side of the film packet?
    • A. 

      Film speed

    • B. 

      Expiration date

    • C. 

      The phrase "opposite side toward tube"

    • D. 

      Number of films enclosed

  • 4. 
    Which of the following describes scatter radiation?
    • A. 

      Radiation that exits the tubehead

    • B. 

      Radiation that is more penetrating than primary radiation

    • C. 

      Radiation that has been deflected from its path by interaction with matter

    • D. 

      None of the above

  • 5. 
    Identify the unit of measurement that is used to describe the amount of electric current flowing through the x-ray tube. 
    • A. 

      Volt

    • B. 

      Ampere

    • C. 

      Kilovoltage peak

    • D. 

      Force

  • 6. 
    The total energy contained in the x-ray beam in a specific area at a given time is termed:
    • A. 

      Kilovoltage peak

    • B. 

      Beam quality

    • C. 

      Intensity

    • D. 

      Millamperage-second

  • 7. 
    The thermometer for manual processing should be placed in the _______. 
    • A. 

      Developer solution

    • B. 

      Water bath

    • C. 

      Fixer solution

    • D. 

      Either a or c

    • E. 

      All of the above

  • 8. 
    At 68º F, what is the optimal development time for manual film processing?
    • A. 

      2 minutes

    • B. 

      3 minutes

    • C. 

      4 minutes

    • D. 

      5 minutes

    • E. 

      6 minutes

  • 9. 
    If kilovoltage is decreased with no other variations in exposure factors, the resultant image will:
    • A. 

      Appear lighter

    • B. 

      Appear darker

    • C. 

      Remain the same

    • D. 

      Either a or b

  • 10. 
    What is the greatest contributor to artificial radiation exposure? 
    • A. 

      Radioactive materials

    • B. 

      Medical radiation

    • C. 

      Consumer products

    • D. 

      Weapons production

    • E. 

      Nuclear fuel cycle

  • 11. 
    In manual film processing the optimal temperature for the developer solution is:
    • A. 

      55º F

    • B. 

      68º F

    • C. 

      78º F

    • D. 

      80º F

    • E. 

      90º F

  • 12. 
    Which of the following statements is incorrect?
    • A. 

      Velocity is the speed of a wave

    • B. 

      Wavelength is the distance between waves

    • C. 

      Frequency is the number of wavelengths that pass a given point in a certain amount of time

    • D. 

      Frequency and wavelength are inversely related

  • 13. 
    Portion of a processed radiograph that appears light or white is termed as _____. 
    • A. 

      Radiolucent

    • B. 

      Radiopaque

    • C. 

      Dense

    • D. 

      High density

  • 14. 
    Wavelength is used to determine __________. 
    • A. 

      The temperature of the cathode filament

    • B. 

      Energy and penetrating power of radiation

    • C. 

      The speed of a wave

    • D. 

      None of the above

  • 15. 
    Dental patient has thick soft tissues and dense bones. to compensate for this increase in subject thickness and  to provide an image of diagnostic density the dental radiographer may:
    • A. 

      Increase the exposure time

    • B. 

      Increase the milliamperage

    • C. 

      Increase the operating kilovoltage peak

    • D. 

      Any of the above

  • 16. 
    When viewed on a light source, a dental radiograph that demonstrates very dark areas and very light areas is said to have
    • A. 

      High contrast

    • B. 

      Low contrast

    • C. 

      High density

    • D. 

      Low density

  • 17. 
    The device used to hold the extraoral film and intensifying screens is termed as _____. 
    • A. 

      Screen holder

    • B. 

      Film holder

    • C. 

      Cassette

    • D. 

      Any of the above

  • 18. 
    Which of the following film sizes is known as the standard film?
    • A. 

      Size 0

    • B. 

      Size 1

    • C. 

      Size 2

    • D. 

      Size 3

  • 19. 
    Which beam alignment devices are recommended for use with the paralleling technique to reduce radiation exposure to to the patient?
  • 20. 
    The size of the darkroom is determined by all the following factors except:
    • A. 

      Volume of radiographs processed

    • B. 

      Type of processing equipment used

    • C. 

      Humidity level of the room

    • D. 

      Space required for duplication of films

    • E. 

      Number of persons using the room

  • 21. 
    Difference in the degrees of blackness between adjacent areas on a dental radiograph is termed :
    • A. 

      Density

    • B. 

      Contrast

    • C. 

      Subject thickness

    • D. 

      Diagnostic quality

  • 22. 
    Identify the term that describes how dark  and light areas are differentiated on an image:
    • A. 

      Contrast

    • B. 

      Density

    • C. 

      Intensity

    • D. 

      Polychromatic

  • 23. 
    All the following factors affect the life of the processing solutions except
    • A. 

      Number of film processed

    • B. 

      Care in preparation of solutions

    • C. 

      Type of safelight filter used

    • D. 

      Age of solutions

    • E. 

      Proper care and maintenance of the automatic processor

  • 24. 
    Any leaks of white light into the darkroom will cause:
    • A. 

      Film fogging

    • B. 

      Film reticulation

    • C. 

      Overdeveloped films

    • D. 

      Underexposed films

    • E. 

      All of the above

  • 25. 
    Which of the following appears most radiolucent on a radiograph
    • A. 

      Bone

    • B. 

      Enamel

    • C. 

      Dentin

    • D. 

      Air space

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