ARDMS - SPI Exam Questions with 100% Correct Answers

ARDMS - SPI Exam Questions with 100%
Correct 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. - ✔✔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 - ✔✔D) Quartered

Frequency increased from 3 MHz to 6 MHz, what will happen to wavelength?

A) Doubled

B) Quadrupled

C) Halved

D) Quartered - ✔✔C) Halved


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,Intensity is equal to:

A) power/area

B) propagation speed/frequency

C) density x propagation speed

D) area/power - ✔✔A) power/area

5. What is important when selecting a transducer frequency?

A) Depth

B) Power

C) Velocity

D) Propagation speed - ✔✔A) Depth

6. Frequency is a factor in:

A) impedance

B) tissue attenuation

C) propagation speed

D) tissue density - ✔✔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

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,D) Lung to soft tissue - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔B) 3 dB

11. To improve the quality of the motion during an electrocardiogram, which

resolution should be improved?
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, A) Transverse resolution

B) Lateral resolution

C) Axial resolution

D) Temporal resolution - ✔✔D) Temporal resolution

12. Ultrasound frequency begins at:

A) 2 Hz

B) 20 Hz

C) 20 Mhz

D) 20 kHz - ✔✔D) 20 kHz

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. 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

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