Exam (elaborations)
SPI Practice Test QUESTIONS AND ANSWERS (VERIFIED) 2024/2025
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SPI Practice Test QUESTIONS AND ANSWERS (VERIFIED) 2024/2025
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SPI Practice Test1.Which of the following do the source and the medium determine?
a. duty factor
b. frequency
c. propagation speed
d. axial resolution: d.
2.Axial resolution is affected by all of the following EXCEPT
a. frequency
b. damping
c. spatial pulse length
d. focusing: d.
3.Damping in a transducer
a. reduces the number of cycles in a pulse and increases the quality factor
,b. increases the number of cycles in a pulse and increases penetration
c. causes poor axial and lateral resolution
d. reduces the duty factor and increases the range of transmitted frequencies
: d.
4.Far zone beam divergence can be reduced on a single-element
transducer by using
a. a transducer with a smaller element diameter
b. a higher frequency transducer
c. a lower frequency transducer or a smaller element diameter
d. adjustable focusing: b.
5.The area between the face of an unfocused single-element transducer
and the point where the beam starts to diverge is the
a. Fraunhofer zone
b. refraction zone
c. focal zone
,d. near zone: d.
6.Assuming a fixed frequency, what happens if the diameter of an
unfocused transducer is increased?
a. the far zone divergence increases
b. the penetration decreases
, c. the length of the near zone increases
d. the length of the near zone decreases: c.
7.Which of the following does NOT affect lateral resolution?
a. focusing
b. element diameter
c. frequency
d. bandwidth: d.
8.Higher frequency transducers provide
a. improved lateral resolution
b. smaller Doppler shifts
c. improved axial resolution and reduced attenuation
d. increased penetration: a.
9.Ultrasound waves that are traveling through a medium consist of
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