ARDMS - SPI EXAM QUESTIONS WITH
VERIFIED ANSWERS.
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
C) Frequency
D) Intensity - Correct Answer-B) Bulk modulus (stiffness)
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 - Correct Answer-D) 3 dB/cm
15. Which reflector type requires a specific angle for optimal imaging?
A) Diffuse
B) Specular
C) Rayleigh's scattering
D) Scattering - Correct Answer-B) Specular
16. A difference between the incident angle and the transmitted angle,
means which process has happened?
A) Reflection
B) Refraction
C) Rarefaction
D) Absorption - Correct Answer-B) Refraction
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 - Correct Answer-C) Temporal
resolution for lateral resolution
18. The number of pulses per second is called:
A) PRF
B) PD
C) SPL
VERIFIED ANSWERS.
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
C) Frequency
D) Intensity - Correct Answer-B) Bulk modulus (stiffness)
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 - Correct Answer-D) 3 dB/cm
15. Which reflector type requires a specific angle for optimal imaging?
A) Diffuse
B) Specular
C) Rayleigh's scattering
D) Scattering - Correct Answer-B) Specular
16. A difference between the incident angle and the transmitted angle,
means which process has happened?
A) Reflection
B) Refraction
C) Rarefaction
D) Absorption - Correct Answer-B) Refraction
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 - Correct Answer-C) Temporal
resolution for lateral resolution
18. The number of pulses per second is called:
A) PRF
B) PD
C) SPL
