Edelman SPI workbook
Comprehensive Questions
(Frequently Tested) with
Verified Answers Graded A+
Sound waves are - Answer: longitudinal and mechanical
The speed of US in soft tissue is closest to - Answer: 1,500m/s
The frequency closest to the lower limit of US is - Answer: 15,000 Hz
Which is not an acoustic variable? - Answer: intensity
The effects of soft tissue on US are called - Answer: acoustic propagation properties
All of the following are true EXCEPT - Answer: two waves with identical frequencies must
interfere constructively
Put in decreasing order - Answer: deca, deci, centi, micro
What is the time to complete one cycle - Answer: period
, Which of the following sound Waves is ultrasonic and least useful and diagnostic imaging -
Answer: 30 kHz
What is the frequency of a wave with 1msec period? - Answer: 1 kHz
_______ is the distance covered by one cycle - Answer: wavelength
Which of the following is determined by the sound source and the medium? - Answer: Range
resolution
_________= Frequency x Wavelength - Answer: Propagation speed
As a result of ____ the propagation speed increases - Answer: decreasing compressibility and
decreasing density
Put these in decreasing order of propagation speed - Answer: Solid, liquid, gas
In the same medium, if the frequency of US is increased from 0.77 MHz to 1.54 MHz what
happens to the wavelength? - Answer: Halved
A soundwaves frequency is 10 MHz. The wave is traveling in soft tissue. What is the wavelength
- Answer: 0.15mm
If the frequency of a US wave is doubled, what happens to the period? - Answer: Doubles
If the frequency of the US is increased from 0.77 MHz to 1.54 MHz what happens to the
propagation speed - Answer: remains the same
Comprehensive Questions
(Frequently Tested) with
Verified Answers Graded A+
Sound waves are - Answer: longitudinal and mechanical
The speed of US in soft tissue is closest to - Answer: 1,500m/s
The frequency closest to the lower limit of US is - Answer: 15,000 Hz
Which is not an acoustic variable? - Answer: intensity
The effects of soft tissue on US are called - Answer: acoustic propagation properties
All of the following are true EXCEPT - Answer: two waves with identical frequencies must
interfere constructively
Put in decreasing order - Answer: deca, deci, centi, micro
What is the time to complete one cycle - Answer: period
, Which of the following sound Waves is ultrasonic and least useful and diagnostic imaging -
Answer: 30 kHz
What is the frequency of a wave with 1msec period? - Answer: 1 kHz
_______ is the distance covered by one cycle - Answer: wavelength
Which of the following is determined by the sound source and the medium? - Answer: Range
resolution
_________= Frequency x Wavelength - Answer: Propagation speed
As a result of ____ the propagation speed increases - Answer: decreasing compressibility and
decreasing density
Put these in decreasing order of propagation speed - Answer: Solid, liquid, gas
In the same medium, if the frequency of US is increased from 0.77 MHz to 1.54 MHz what
happens to the wavelength? - Answer: Halved
A soundwaves frequency is 10 MHz. The wave is traveling in soft tissue. What is the wavelength
- Answer: 0.15mm
If the frequency of a US wave is doubled, what happens to the period? - Answer: Doubles
If the frequency of the US is increased from 0.77 MHz to 1.54 MHz what happens to the
propagation speed - Answer: remains the same
