SPI TEST EXAM AND PRACTICE EXAM QUESTIONS

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SPI TEST EXAM AND PRACTICE EXAM QUESTIONS

2025 COMPLETE EXAM QUESTIONS WITH DETAILED

VERIFIED ANSWERS (100% CORRECT ANSWERS)

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Which of the following do the source and the medium determine?

• duty factor
• frequency
• propagation speed
• axial resolution - Answer-d.

Axial resolution is affected by all of the following EXCEPT

• frequency
• damping
• spatial pulse length
• focusing - Answer-d.

Damping in a transducer 1 / 4

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• reduces the number of cycles in a pulse and increases

the quality factor

• increases the number of cycles in a pulse and increases

penetration

• causes poor axial and lateral resolution
• reduces the duty factor and increases the range of

transmitted frequencies - Answer-d.

Far zone beam divergence can be reduced on a single- element transducer by using

• a transducer with a smaller element diameter
• a higher frequency transducer
• a lower frequency transducer or a smaller element

diameter

• adjustable focusing - Answer-b.

The area between the face of an unfocused single- element transducer and the point where the beam starts to diverge is the

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• Fraunhofer zone
• refraction zone
• focal zone
• near zone - Answer-d.

Assuming a fixed frequency, what happens if the diameter of an unfocused transducer is increased?

• the far zone divergence increases
• the penetration decreases
• the length of the near zone increases
• the length of the near zone decreases - Answer-c.

Which of the following does NOT affect lateral resolution?

• focusing
• element diameter
• frequency
• bandwidth - Answer-d.
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Higher frequency transducers provide

• improved lateral resolution
• smaller Doppler shifts
• improved axial resolution and reduced attenuation
• increased penetration - Answer-a.

Ultrasound waves that are traveling through a medium consist of

• electromagnetic and radio frequencies
• compressions and refractions
• electromagnetic and ionizing frequencies
• compressions and rarefactions - Answer-d.

What is the difference between audible sound and ultrasound?

• audible sound waves can travel through a vacuum
• audible sound has a higher frequency
• ultrasound has a higher frequency
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