ARDMS SPI EXAM LATEST EXAM 2025 | ALL QUESTIONS AND CORRECT ANSWERS (GRADED A+) | VERIFIED ANSWERS | LATEST VERSION

ARDMS - SPI Exam
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1. 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.: B) longitudinal wave
2. If the sound beam attenuated 6 dB, what will happen to the overall intensi-
ty?
A) Quadrupled
B) Doubled
C) Halved
D) Quartered: D) Quartered
3. Frequency increased from 3 MHz to 6 MHz, what will happen to wavelength?
A) Doubled
B) Quadrupled
C) Halved
D) Quartered: C) Halved
4. Intensity is equal to:
A) power/area
B) propagation speed/frequency
C) density x propagation speed
D) area/power: A) power/area
5. 5. What is important when selecting a transducer frequency?
A) Depth
B) Power
C) Velocity
D) Propagation speed: A) Depth
6. 6. Frequency is a factor in:
A) impedance
B) tissue attenuation
C) propagation speed
D) tissue density: B) tissue attenuation
7. 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: B) Organ to organ
8. 8. If there is a small impedance mismatch between two mediums, what will
result?


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A) There will be a small reflection
B) There will be a large reflection
C) All sound will transmit
D) No sound will transmit: A) There will be a small reflection
9. 9. Which property of sound is measured in Rayls?
A) Intensity
B) Impedance
C) Density
D) Propagation speed: B) Impedance
10. 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: B) 3 dB
11. 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: D) Temporal resolution
12. 12. Ultrasound frequency begins at:
A) 2 Hz
B) 20 Hz
C) 20 Mhz
D) 20 kHz: D) 20 kHz
13. 13. An increase in which property will increase the propagation speed?
A) Period
B) Bulk modulus
C) Frequency
D) Intensity: B) Bulk modulus (stiffness)
14. 14. A technician is using a 6 MHz transducer at a depth of 4cm, what is the
attenuation coefficient?
A) 1/2 dB/cm
B) 8 dB/cm
C) 6 dB/cm
D) 3 dB/cm: D) 3 dB/cm
15. 15. Which reflector type requires a specific angle for optimal imaging?
A) Diffuse
B) Specular


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C) Rayleigh's scattering
D) Scattering: B) Specular
16. 16. A difference between the incident angle and the transmitted angle,
means which process has happened?
A) Reflection
B) Refraction
C) Rarefaction
D) Absorption: B) Refraction
17. 17. What trade-off is made when there is an increase in the number of scan
lines?
A) Axial resolution for lateral resolution
B) Penetration for axial resolution
C) Temporal resolution for lateral resolution
D) Temporal resolution for penetration: C) Temporal resolution for lateral resolu-
tion
18. 18. The number of pulses per second is called:
A) PRF
B) PD
C) SPL
D) PRP: A) PRF
19. 19. What is the goal for better temporal resolution?
A) Faster frame rate
B) Shorter SPL
C) Narrow beam width
D) Decrease penetration: A) Faster frame rate
20. 20. If the depth is increased, what change will occur to the PRP?
A) Decrease
B) No change
C) Increase
D) Halved: C) Increase
21. 21. Frequency is reduced from 8MHz to 4MHz, what will be the result to the
acoustic velocity?
A) Increase
B) No change
C) Doubled
D) Decrease: B) No change
22. 22. Which of the following refers to the height of the sound wave?
A) Rarefaction
B) Amplitude