SPI REGISTRY EXAM REVIEW
QUESTIONS |GUARANTEED
ACCURATE ANSWERS *(UPDATED
2025)
What type of wave is sound?
a. Mechanical, transverse
b. Mechanical, longitudinal
c. Transverse, longitudinal
d. Lateral wave - Accurate ✔✔✔ ......b. Mechanical, longitudinal
The frequency ranges for ultrasound are:
a. <20 Hz
b. 20 to 20,000 Hz
c. >20 kHz
d. >2000 Hz - Accurate ✔✔✔ ......c. >20 kHz
The speed of sound in soft tissue is:
a. 1.54 mm/s
b. 1540 m/s
c. 1540 km/s
,d. 1.54 m/us - Accurate ✔✔✔ ......b. 1540 m/s
which of the following transducers fires the elements in groups?
a. Linear sequenced array
b. Phased array
c. Continuous-wave transducer
d. Single-element transducer - Accurate ✔✔✔ ......a. Linear sequenced
array
The unit for wavelength is:
a. Millimeters
b. Hertz
c. Microseconds
d. Milliliters - Accurate ✔✔✔ ......a. Millimeters
Enhancement is caused by:
a. Strongly reflecting structures
b. Propagation speed errors
c. Snell's law
d. Weakly attenuating structures - Accurate ✔✔✔ ......d. Weakly
attenuating structures
,the wavelength in a material having a propagation speed of 1.5 mm/us
employing a transducer frequency of 5.0 MHz is:
a. 0.3 mm
b. 0.3 cm
c. 0.6 mm
d. 3.0 mm - Accurate ✔✔✔ ......a. 0.3 mm
An ultrasound transducer converts:
a. Electrical energy into light and heat
b. Electrical energy into mechanical energy
c. Mechanical energy into radiation
d. Sound into ultrasound - Accurate ✔✔✔ ......b. Electrical energy into
mechanical energy
Arrange the following media in correct order from the lowest attenuation
to highest:
a. Air, fat, muscle, bone
b. Muscle, fat, air, blood
c. Fat, muscle, bone, air
d. Muscle, air, fat, bone - Accurate ✔✔✔ ......c. Fat, muscle, bone, air
Arrange the following media in terms of propagation speed, from lowest
to highest:
, a. Air, fat, muscle, bone
b. Bone, fat, air, muscle
c. Bone, muscle, fat, air
d. Muscle, air, fat, bone - Accurate ✔✔✔ ......a. Air, fat, muscle, bone
If the frequency doubles, what happens to the wavelength?
a. Increases fourfold
b. Increases twofold
c. Decreases by one half
d. Frequenct has no relationship to wavelength - Accurate ✔✔✔ ......c.
Decreases by one half
What happens to intensity if the amplitude of a signal is halved?
a. Quartered
b. Quadrupled
c. Halved
d. No change - Accurate ✔✔✔ ......a. Quartered
Which of the following would be used to describe the percentage of time
that sound is on?
a. Intensity
b. Amplitude
c. SPTA
QUESTIONS |GUARANTEED
ACCURATE ANSWERS *(UPDATED
2025)
What type of wave is sound?
a. Mechanical, transverse
b. Mechanical, longitudinal
c. Transverse, longitudinal
d. Lateral wave - Accurate ✔✔✔ ......b. Mechanical, longitudinal
The frequency ranges for ultrasound are:
a. <20 Hz
b. 20 to 20,000 Hz
c. >20 kHz
d. >2000 Hz - Accurate ✔✔✔ ......c. >20 kHz
The speed of sound in soft tissue is:
a. 1.54 mm/s
b. 1540 m/s
c. 1540 km/s
,d. 1.54 m/us - Accurate ✔✔✔ ......b. 1540 m/s
which of the following transducers fires the elements in groups?
a. Linear sequenced array
b. Phased array
c. Continuous-wave transducer
d. Single-element transducer - Accurate ✔✔✔ ......a. Linear sequenced
array
The unit for wavelength is:
a. Millimeters
b. Hertz
c. Microseconds
d. Milliliters - Accurate ✔✔✔ ......a. Millimeters
Enhancement is caused by:
a. Strongly reflecting structures
b. Propagation speed errors
c. Snell's law
d. Weakly attenuating structures - Accurate ✔✔✔ ......d. Weakly
attenuating structures
,the wavelength in a material having a propagation speed of 1.5 mm/us
employing a transducer frequency of 5.0 MHz is:
a. 0.3 mm
b. 0.3 cm
c. 0.6 mm
d. 3.0 mm - Accurate ✔✔✔ ......a. 0.3 mm
An ultrasound transducer converts:
a. Electrical energy into light and heat
b. Electrical energy into mechanical energy
c. Mechanical energy into radiation
d. Sound into ultrasound - Accurate ✔✔✔ ......b. Electrical energy into
mechanical energy
Arrange the following media in correct order from the lowest attenuation
to highest:
a. Air, fat, muscle, bone
b. Muscle, fat, air, blood
c. Fat, muscle, bone, air
d. Muscle, air, fat, bone - Accurate ✔✔✔ ......c. Fat, muscle, bone, air
Arrange the following media in terms of propagation speed, from lowest
to highest:
, a. Air, fat, muscle, bone
b. Bone, fat, air, muscle
c. Bone, muscle, fat, air
d. Muscle, air, fat, bone - Accurate ✔✔✔ ......a. Air, fat, muscle, bone
If the frequency doubles, what happens to the wavelength?
a. Increases fourfold
b. Increases twofold
c. Decreases by one half
d. Frequenct has no relationship to wavelength - Accurate ✔✔✔ ......c.
Decreases by one half
What happens to intensity if the amplitude of a signal is halved?
a. Quartered
b. Quadrupled
c. Halved
d. No change - Accurate ✔✔✔ ......a. Quartered
Which of the following would be used to describe the percentage of time
that sound is on?
a. Intensity
b. Amplitude
c. SPTA
