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Ultrasound Physics - Mock Exam Questions for SPI
Questions with Answers (100% Correct Answers)
Which of the following transducers will have the worst axial
resolution?
a. Vector array, 3 MHz
b. Linear Sequential Array, 6 MHZ
c. Linear Phased Array 7.5 MHZ
d. Annular Array, 6 MHz— Answer: Vector array, 3 MHz
A sound wave is traveling in the body and propagates from muscle to
air. What percentage of the sound wave is most likely reflected at the
muscle-air boundary?
a. 0.5%
b. 75%
c. 25%
d. 5%
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e. 99%— Answer: 75%
Which of the following lists is in decreasing order?
a. mega, kilo, deca, milli, nano
b. centi, mill, kilo, mega, nano
c. micro, milli, deci, kilo, mega
d. micro, kilo, mega, deci, milli
e. mega, micro, deci, milli, hecto— Answer: mega, kilo, deca, milk,
nano
During a diagnostic exam, which of these statements is most correct
when describing the pulsed echo characteristics of an ultrasound
system.
a. The listening time may be one-thousand times longer than the pulse
duration.
b. the pulse duration is longer than the pulse repetition period.
c. The pulse duration is similar to the listening time.
d. The duty factor has a value close to 1
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e. The pulse repitition period is similar to the period.— Answer: The
listening time may be one-thousand times longer than the pulse
duration.
Which of the following parameters is determined by both the
ultrasound system and the medium through which the sound travels?
a. period
b. frequency
c. temperature
d. wavelength
e. velocity of the sound— Answer: wavelength
You should be familiar with the formula L= C/F.
What does "C" stand for in this equation?
a. characteristic impedence
b. density
c. compliance
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, 4
d. compressability
e. propagation speed— Answer: propagation speed
Which of the following lists is in increasing order?
a. mega, kilo, milli, nano, centi
b. centi, milli, kilo, mega, nano
c. micro, kilo, milli, deci, mega
d. micro, milli, deci, kilo, mega
e. mega, micro, deci, mill, hecto— Answer: micro, milli, deci, kilo,
mega
Which of the following statements about speed and attenuation are
true?
a. Attenuation through and propagation speed in a particular medium
are unrelated to each other.
b. When a sound beam travels faster in a medium, the attenuation is
less.
© 2025 All rights reserved
Ultrasound Physics - Mock Exam Questions for SPI
Questions with Answers (100% Correct Answers)
Which of the following transducers will have the worst axial
resolution?
a. Vector array, 3 MHz
b. Linear Sequential Array, 6 MHZ
c. Linear Phased Array 7.5 MHZ
d. Annular Array, 6 MHz— Answer: Vector array, 3 MHz
A sound wave is traveling in the body and propagates from muscle to
air. What percentage of the sound wave is most likely reflected at the
muscle-air boundary?
a. 0.5%
b. 75%
c. 25%
d. 5%
© 2025 All rights reserved
,2
e. 99%— Answer: 75%
Which of the following lists is in decreasing order?
a. mega, kilo, deca, milli, nano
b. centi, mill, kilo, mega, nano
c. micro, milli, deci, kilo, mega
d. micro, kilo, mega, deci, milli
e. mega, micro, deci, milli, hecto— Answer: mega, kilo, deca, milk,
nano
During a diagnostic exam, which of these statements is most correct
when describing the pulsed echo characteristics of an ultrasound
system.
a. The listening time may be one-thousand times longer than the pulse
duration.
b. the pulse duration is longer than the pulse repetition period.
c. The pulse duration is similar to the listening time.
d. The duty factor has a value close to 1
© 2025 All rights reserved
,3
e. The pulse repitition period is similar to the period.— Answer: The
listening time may be one-thousand times longer than the pulse
duration.
Which of the following parameters is determined by both the
ultrasound system and the medium through which the sound travels?
a. period
b. frequency
c. temperature
d. wavelength
e. velocity of the sound— Answer: wavelength
You should be familiar with the formula L= C/F.
What does "C" stand for in this equation?
a. characteristic impedence
b. density
c. compliance
© 2025 All rights reserved
, 4
d. compressability
e. propagation speed— Answer: propagation speed
Which of the following lists is in increasing order?
a. mega, kilo, milli, nano, centi
b. centi, milli, kilo, mega, nano
c. micro, kilo, milli, deci, mega
d. micro, milli, deci, kilo, mega
e. mega, micro, deci, mill, hecto— Answer: micro, milli, deci, kilo,
mega
Which of the following statements about speed and attenuation are
true?
a. Attenuation through and propagation speed in a particular medium
are unrelated to each other.
b. When a sound beam travels faster in a medium, the attenuation is
less.
© 2025 All rights reserved
