Quiz On Physics GK Question And Answers

48 Questions | Total Attempts: 241

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Physics Quizzes & Trivia

The study of matter, motion, energy, force and much more is on the line in this quiz as we take a closer look at the scientific subgenre of physics. What can you tell us about the following topics?


Questions and Answers
  • 1. 
    The frequency closest to the lower limit of US is
    • A. 

      19,000 kHz

    • B. 

      10,000 MHz

    • C. 

      20,000 msec

    • D. 

      15,000 Hz

  • 2. 
    Put in decreasing order
    • A. 

      Deca, deci, centi, micro

    • B. 

      Deci, deca, centi, micro

    • C. 

      Micro, centi, deca, deci

    • D. 

      Centi, micro, deci, deca

  • 3. 
    Which of the following is determined by the source and the medium?
    • A. 

      Frequency

    • B. 

      Period

    • C. 

      Propagation speed

    • D. 

      Range resolution

  • 4. 
    As a result of _____________ the propagation sped increases
    • A. 

      Increasing stiffness and increasing density

    • B. 

      Increasing stiffness and increasing elasticity

    • C. 

      Decreasing compressibility and decreasing density

    • D. 

      Decreasing stiffness and decreasing density

  • 5. 
    Put in decreasing order of propagation speed.
    • A. 

      Gas, liquid and solid

    • B. 

      Solid liquid and gas

    • C. 

      Liquid gas solid

  • 6. 
    If the frequency of US is increased from 0.77 MHz to 1.54 MHz, what happends to the wavelength?
    • A. 

      Doubles

    • B. 

      Halved

    • C. 

      Remain the same

    • D. 

      4 times greater

  • 7. 
    If the intensity of a sound beam remains unchanged while the beam area is reduced in half, what has happend to the power?
    • A. 

      Quadrupled

    • B. 

      Doubled

    • C. 

      Halved

    • D. 

      Unchanged

  • 8. 
    What is the minimum value of the duty factor?
    • A. 

      10.0

    • B. 

      1%

    • C. 

      1.0

    • D. 

      0.0%

  • 9. 
    If a 5MHz sound wave is traveling in the tissues listed below, which will have the longest wavelength?
    • A. 

      Fat

    • B. 

      Air

    • C. 

      Muscle

    • D. 

      Bone

  • 10. 
    As the impedances (z (rayls) = density (kg/m^3) x prop. speed (m/s) or acoustic resistance to sound traveling in a medium, becomes vastly different, the
    • A. 

      Reflection increases

    • B. 

      Transmission increases

    • C. 

      Refraction increases

    • D. 

      Absorption increases

  • 11. 
    With normal incidence, what factors affect refraction of US?
    • A. 

      Propagation speeds

    • B. 

      Frequencies

    • C. 

      Attenuation coefficients

    • D. 

      None of the above

  • 12. 
    The most likely amount of reflection at a boundary between soft tissue is:
    • A. 

      1%

    • B. 

      22%

    • C. 

      34%

    • D. 

      99%

  • 13. 
    How many cm are 60 millimeters
    • A. 

      600

    • B. 

      6

    • C. 

      0.6

    • D. 

      0.006

  • 14. 
    How is range ambiguity artifact eliminated?
    • A. 

      Lower the PRF

    • B. 

      Raise the PRF

    • C. 

      Increase the gain

    • D. 

      Use a lower frequency transducer

  • 15. 
    Under which of the following conditions is lateral resolution improved?
    • A. 

      Decreased beam diameter

    • B. 

      Decreased pulse duration

    • C. 

      Decreased imaging depth

    • D. 

      Decreased pixel size

    • E. 

      Decreased spatial pulse length

  • 16. 
    Which transducer would be best to image superficial structures?
    • A. 

      Small diameter, high frequency

    • B. 

      Small diameter, low frequency

    • C. 

      Large diameter, high frequency

    • D. 

      Large diameter, low frequency

  • 17. 
    If the frame rate increases and the lines per frame is unchanged, what else must happen?
    • A. 

      US speed increases

    • B. 

      Frequency increases

    • C. 

      Depth increases

    • D. 

      Depth decreases

  • 18. 
    TRUE OR FALSEA system which was working well now does not display clear images in the far field.  This may be a problem with the monitor.
    • A. 

      True

    • B. 

      False

  • 19. 
    If the output of an US machine is calibrated in dB and the output is increased by 20 dB, the beam intensity is increased
    • A. 

      100 times

    • B. 

      1,000,000 times

    • C. 

      20 times

    • D. 

      10 times

  • 20. 
    Which of the following will result in the greatest number of shades of grapy in a digital image display?
    • A. 

      Large pixels with many bits/pixel

    • B. 

      Small pixels with few bits/pixel

    • C. 

      Many TV lines per frame

    • D. 

      High contrast

    • E. 

      Narrow dynamic range

  • 21. 
    With good images on the CRT but not on the strip chart recorder, one should
    • A. 

      Increase the gain

    • B. 

      Check the scan head

    • C. 

      Check the same converter

    • D. 

      Adjust the recorder

  • 22. 
    Compression is used to
    • A. 

      Decrease the amplitude

    • B. 

      Decrease the range of amplitudes

    • C. 

      Decrease the range of frequencies

  • 23. 
    In which of these biologic tissues will sound waves propagate most quickly?
    • A. 

      Tendon

    • B. 

      Blood

    • C. 

      Lung

    • D. 

      Fat

    • E. 

      Amniotic fluid

  • 24. 
    All of the following statements regarding in-vitro bioeffects are true EXCEPT?
    • A. 

      In vitro bioeffects conclusions are clinically relevant

    • B. 

      In vitro bioeffects are always real

    • C. 

      In vitro bioeffects are vey important

    • D. 

      In vitro bioeffects may not be applicable to clinical settings

  • 25. 
    Which of the following improves signal to noise ratio
    • A. 

      Dynamic range

    • B. 

      Frame averaging

    • C. 

      Gray scale

    • D. 

      Edge enhancement

    • E. 

      Receiver gain

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