Davies Physics Mock Exam Review Questions With 100% Correct
Answers Verified
1. Intensity is equal to: Power / beam area²
2. As frequency increases, wavelength Decreases
3. In diagnostic ultrasound, .1 mm -.8mm
wavelength ranges from
4. The prefix "micro" is used for Millionth
5. If the frequency of US is increasedfrom Remains the same
0.77 MHz to 1.54 MHz, what
happens to the propagation
speed?
6. What is the range of frequencies 2 MHz - 10 MHz
used in diagnostic ultrasound ?
7. Name the acoustic variables. Density
Temperatur
e
Pressure
8. 1 divided by frequency is the Period
equation for
9. The time that it takes for one Period
cycle to occur is called the
10. The prefix "micro" means . 10 to the power of -6
11. The unit of measurement that is microseconds
used for period is
12. Pulse duration
1/
60
, Davies Physics Mock Exam Review Questions With 100% Correct
Answers Verified
The time from the beginning of a
pulse to its end is ?
13. Power of sound has units of Watts
14. Which of the following Propagation speed / wavelength
equations is that for
frequency? (Wavelength = prop speed/freq)
15. What is the log of 1000? 3
16. If you increase the intensity by 3dB, it Doubles
17. Sine of transmission angle
divided by Sine of incident angle
= ( Propagation speed medium Snell's law
1 )divided by (Propaga- tion speed
medium 2). This equation is used
for
18. What determines the speed of
sound in a material? Density and stittness
19. Which of the following has the greatest Bone
propagation speed?
20. Name the reasons for attenuation Absorption, reflection, and scattering
21. Frequency divided by 2 is the Attenuation coeflcient
formula for
2/
60
, Davies Physics Mock Exam Review Questions With 100% Correct
Answers Verified
22. RAYL are the units used for Impedance
3/
60
, Davies Physics Mock Exam Review Questions With 100% Correct
Answers Verified
23. Complete the following statement:
Scatter increases
As frequency increases,
24. The equation: "density Impedance
x
propagation speed" determines
0.097%
25. f the sound beam strikes the
medium at a right angle and the
RAYLE of medi- um 1 = 1.55 and
the RAYLE of medium 2 = 1.65,
what is the percentage of re-
flected echo intensity?
26. For soft tissue, the approximate atten- Frequency, MHz
uation coefficient in dB/cm is
equal to one-half in .
27. Ultrasound imaging transducer 2-3
typi- cally generate pulses of how
many cy- cles?
28. In a linear phased array, the Electronically
beam is steered .
29. T/F: To find out the operating
frequen- True cy of a transducer, the
material's prop- agation speed is
divided by twice the thickness.
30. Which of the following is the 9MHz sound beam?
half-val- ue layer thickness for a
4/
60
Answers Verified
1. Intensity is equal to: Power / beam area²
2. As frequency increases, wavelength Decreases
3. In diagnostic ultrasound, .1 mm -.8mm
wavelength ranges from
4. The prefix "micro" is used for Millionth
5. If the frequency of US is increasedfrom Remains the same
0.77 MHz to 1.54 MHz, what
happens to the propagation
speed?
6. What is the range of frequencies 2 MHz - 10 MHz
used in diagnostic ultrasound ?
7. Name the acoustic variables. Density
Temperatur
e
Pressure
8. 1 divided by frequency is the Period
equation for
9. The time that it takes for one Period
cycle to occur is called the
10. The prefix "micro" means . 10 to the power of -6
11. The unit of measurement that is microseconds
used for period is
12. Pulse duration
1/
60
, Davies Physics Mock Exam Review Questions With 100% Correct
Answers Verified
The time from the beginning of a
pulse to its end is ?
13. Power of sound has units of Watts
14. Which of the following Propagation speed / wavelength
equations is that for
frequency? (Wavelength = prop speed/freq)
15. What is the log of 1000? 3
16. If you increase the intensity by 3dB, it Doubles
17. Sine of transmission angle
divided by Sine of incident angle
= ( Propagation speed medium Snell's law
1 )divided by (Propaga- tion speed
medium 2). This equation is used
for
18. What determines the speed of
sound in a material? Density and stittness
19. Which of the following has the greatest Bone
propagation speed?
20. Name the reasons for attenuation Absorption, reflection, and scattering
21. Frequency divided by 2 is the Attenuation coeflcient
formula for
2/
60
, Davies Physics Mock Exam Review Questions With 100% Correct
Answers Verified
22. RAYL are the units used for Impedance
3/
60
, Davies Physics Mock Exam Review Questions With 100% Correct
Answers Verified
23. Complete the following statement:
Scatter increases
As frequency increases,
24. The equation: "density Impedance
x
propagation speed" determines
0.097%
25. f the sound beam strikes the
medium at a right angle and the
RAYLE of medi- um 1 = 1.55 and
the RAYLE of medium 2 = 1.65,
what is the percentage of re-
flected echo intensity?
26. For soft tissue, the approximate atten- Frequency, MHz
uation coefficient in dB/cm is
equal to one-half in .
27. Ultrasound imaging transducer 2-3
typi- cally generate pulses of how
many cy- cles?
28. In a linear phased array, the Electronically
beam is steered .
29. T/F: To find out the operating
frequen- True cy of a transducer, the
material's prop- agation speed is
divided by twice the thickness.
30. Which of the following is the 9MHz sound beam?
half-val- ue layer thickness for a
4/
60
