ARDMS Ultrasound Physics & Instrumentation Practice Exam Part 1 June 1, 2015 By Rana Waqar 1 Comment 1. Which of the following is described as the ability of an object to resist compression and relates to the hardness of a medium?* a. Stiffness b. Density c. Pressure d. Inertia 2. An increase in pulse repetition frequency would lead to:* a. An increase in duty factor b. An increase in pulse duration c. An increase in the number of cycles d. A decrease in resolution 3. Which of the following would have the highest propagation speed?* a. Air b. Bone c. Soft tissue d. Water 4. Which of the following would have the lowest propagation speed?* a. Water b. Soft tissue c. Bone d. Lung tissue 5. As imaging depth increases, the pulse repetition frequency must:* a. Not change b. Increase c. Decrease d. Pulse repetition frequency does not relate to imaging depth 6. Which of the following describes the amount of refraction that occurs at an interface?* a. Bernoulli’s law b. Poiseuille’s law c. Law of reflection d. Snell’s law 7. Pressure is typically expressed in:* a. Frequency b. Pascals c. Decibels d. Kilograms per centimeter cubed 8. The typical range of frequency for diagnostic ultrasound imaging is:* a. 20 to 20,000 Hz b. 1 to 20 MHz c. 10 to 20 MHz d. 12 to 100 MHz 9. The attenuation coefficient in soft tissue is equal to:* a. One half of the operating frequency b. Double the operating frequency c. Frequency times path length d. The total decibels 10. Micro denotes:* a. Millionth b. Hundredth c. Million d. Billionth 11. Which of the following is described as the distance over which one cycle occurs?* a. Pulse duration b. Duty factor c. Period d. Wavelength 12. All of the following are true of stiffness except:* a. It is defined as the ability of an object to resist compression b. Stiffness and propagation speed are indirectly associated c. Increasing stiffness increases propagation speed d. Stiffness may also be referred to as elasticity 13. Areas of high pressure and density are referred to as:* a. Compressions b. Rarefactions c. Condensations d. Rarefractions 14. Spatial pulse length can be calculated by:* a. Multiplying the number of cycles times the frequency b. Dividing the period by the frequency c. Multiplying the number of cycles times the wavelength d. Dividing the number of cycles by the wavelength 15. Density is typically measured in:* a. Kilograms per centimeter cubed b. Millimeters c. Watts per centimeter squared d. Pascals 16. As a sound wave travels through the human body, the intensity of the sound wave decreases as a result of:* a. Attenuation b. Absorption c. Scattering d. All of the above 17. What is the total amount of attenuation that occurs if a 6.0-MHz sound beam travels through 4 cm of soft tissue?* a. 24 dB b. 12 dB c. 6 dB d. None of the above 18. As imaging depth increases, pulse repetition period:* a. Remains constant b. Increases c. Decreases d. Doubles 19. If pulse repetition frequency increases, then the duty factor:* a. Remains constant b. Increases c. Decreases d. Doubles 20. The percentage of time that the ultrasound system is producing pulses of ultrasound describes the:* a. Pulse repetition period b. Pulse duration c. Duty factor d. Pulse repetition frequency 21. Density and propagation speed are:* a. Inversely related b. Directly related c. Directly proportional d. Unrelated 22. All of the following are true of power except:* a. As amplitude increases, power remains the same b. Power is proportional to amplitude squared c. Intensity is proportional to power d. Power is measured in milliwatts 23. All of the following are true of wavelength except:* a. It is determined by both the medium and the sound source b. It is equal to the period divided by the frequency c. It is inversely related to frequency d. It is directly related to period 24. Which of the following is determined by the sound source and medium?* a. Propagation speed b. Frequency c. Period d. Wavelength 25. Which of the following is defined as the number of ultrasound pulses emitted in 1 second?* a. Pulse repetition period b. Duty factor c. Pulse repetition frequency d. Spatial pulse length Δ For More questions please join Our facebook group: https://www.facebook.com/groups/249298882082586/?ref=br_rs
qamarus salam says January 6, 2023 at 2:00 pm kindly tell me book u recommond for passing physiscs module Reply
qamarus salam says
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