Davies Physics SPI Exam | 67 Actual Questions with Verified Answers | Latest 2025/2026 Update| 100% Correct.

Davies Physics SPI Exam | 67 Actual i,- i,- i,- i,- i,- i,- i,-




Questions with Verified Answers | Latest i,- i,- i,- i,- i,- i,-




2025/2026 Update| 100% Correct. i,- i,- i,-




Which phenomenon is associated w/ a pattern produced by a
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sound beam after passing through a small aperture?
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A) Scattering
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B) Absorption
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C) Diffraction
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D) Interference
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E) Diffuse reflection
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What system control should you adjust to compensate for sound
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attenuation w/ increasing depth? i,- i,- i,-




A) Dynamic range
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B) TGC
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C) Transmit power
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D) Overall receiver gain
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E) Focus position
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,You are imaging a structure containing two media having the
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same impedance. What will occur at the boundary of the two
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structures?


A) All of the sound will be transmitted
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B) All of the sound will be reflected
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C)Some of the sound will be refracted
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D) Some of the sound will be reflected and some of the sound
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will be transmitted
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E) Most of the sound will be absorbed at the media boundary
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A) All of the sound will be transmitted
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Snell's law describes i,- i,-




A) The percentage of reflection at an interface w/ normal
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incidence and different densities i,- i,- i,-




B) The angle of sound transmission at an interface between
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media having different propagation speeds
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C) The amount of attenuation of sound in tissue w/ depth
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D) The amount of backscatter from a diffuse reflector
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,E) The angle of sound reflection at an interface w/ oblique
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The angle of sound transmission at an interface between media
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having different propagation speeds
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The speed of sound is defined as the:
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A) Speed of the vibrating particles in the medium
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B) Speed at which the sound wave propagates through the
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medium i,-




C) Number of cycles per second of the vibrating particles
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D) Inverse of the frequency
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E) Speed of the electrical impulse applied to the piezoelectric
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element B) Speed at which the sound wave propagates
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through the medium i,- i,-




- What determines acoustic impedance?
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A) Frequency & propagation speed
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B) Frequency & interface size
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C) Density & propagation speed of the medium
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D) Angle of incidence and media propagation speed
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, E) Frequency & media density
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speed of the medium i,- i,- i,-




What can you do to enhance the visibility of a specular reflector?
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A) Scan w/ the lowest possible frequency
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B) Scan w/ oblique incidence
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C) Scan w/ perpendicular incidence
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D) Increase distance to the reflector
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E) Scan w/ an incident angle of 45 degrees
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distance to the reflector i,- i,- i,-




- Acoustic impedance increases w/ which of the following?
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A) Increased tissue density
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B) Increased propagation speed
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C) Increased transducer frequency
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D) A & B i,- i,- i,-




E) All the above
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i,- A) Increased tissue density
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i,- B) Increased propagation speed
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