ARDMS SPI EXAM QUESTIONS AND ANSWERS 100% VERIFIED.

ARDMS SPI EXAM QUESTIONS AND ANSWERS 100% VERIFIED. When the direction of the wave propagation is parallel to the particle motion of the medium, the wave being transmitted is called a: A) surface wave. B) longitudinal wave. C) transverse wave. D) non-linear sound. - correct answer. B) longitudinal wave If the sound beam attenuated 6 dB, what will happen to the overall intensity? A) Quadrupled B) Doubled C) Halved D) Quartered - correct answer. D) Quartered Frequency increased from 3 MHz to 6 MHz, what will happen to wavelength? A) Doubled B) Quadrupled C) Halved D) Quartered - correct answer. C) Halved Intensity is equal to: A) power/area B) propagation speed/frequency C) density x propagation speed D) area/power - correct answer. A) power/area 5. What is important when selecting a transducer frequency? A) Depth B) Power C) Velocity D) Propagation speed - correct answer. A) Depth 6. Frequency is a factor in: A) impedance B) tissue attenuation C) propagation speed D) tissue density - correct answer. B) tissue attenuation 7. Which medium interface will have the greatest sound transmission? A) Soft tissue to water B) Organ to organ C) Bone to organ D) Lung to soft tissue - correct answer. B) Organ to organ 8. If there is a small impedance mismatch between two mediums, what will result? A) There will be a small reflection B) There will be a large reflection C) All sound will transmit D) No sound will transmit - correct answer. A) There will be a small reflection 9. Which property of sound is measured in Rayls? A) Intensity B) Impedance C) Density D) Propagation speed - correct answer. B) Impedance 10. If sound energy is reduced by 50%, how many decibels were lost? A) 6 dB B) 3 dB C) 0 dB D) 10 dB - correct answer. B) 3 dB 11. To improve the quality of the motion during an electrocardiogram, which resolution should be improved? A) Transverse resolution B) Lateral resolution C) Axial resolution D) Temporal resolution - correct answer. D) Temporal resolution 12. Ultrasound frequency begins at: A) 2 Hz B) 20 Hz C) 20 Mhz D) 20 kHz - correct answer. D) 20 kHz 13. An increase in which property will increase the propagation speed? A) Period B) Bulk modulus