SPI Physics
An extra help for those of you who are studying for the SPI. It will be based on chapters 2 - 6
- 1.
Sound waves carry energy
- A.
True
- B.
False
Correct Answer
A. True -
- 2.
Sound waves are longitudinal waves sound travels in a straight line
- A.
True
- B.
False
Correct Answer
A. True -
- 3.
What are the acousitic variables?
- A.
Pressure, density, distance
- B.
Period, frequency, amplitude, power, intensity, wavelength, propagation speed
Correct Answer
A. Pressure, density, distance -
- 4.
What are the acoustic parameters?
- A.
Pressure density distance
- B.
Period frequency amplitude power intensity wavelength propagation speed
Correct Answer
B. Period frequency amplitude power intensity wavelength propagation speed -
- 5.
A pair of waves are considered out of phase when their peaks occur at the same time and location
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
the correct answer to this will be in phase NOT out of phaseRate this question:
-
- 6.
Infrasound is?
- A.
- B.
Between 20 Hz & 20 kHz
- C.
>20 kHz
Correct Answer
A. -
- 7.
Period and frequency are determined by?
- A.
Sound source
- B.
Sound source and medium
- C.
Medium
Correct Answer
A. Sound source -
- 8.
Period and frequency are
- A.
Inversely
- B.
Directly
- C.
Proportional
- D.
Reciprocal
Correct Answer(s)
A. Inversely
D. Reciprocal -
- 9.
Amplitude has which units?
- A.
Acoustic variables
- B.
Watts
- C.
Energy
Correct Answer
A. Acoustic variables -
- 10.
Amplitude , power, intensity are determined by the
- A.
Medium
- B.
Sound source
- C.
Both sound source and medium
Correct Answer
B. Sound source -
- 11.
Amplitude, power, intensity are not adjustable
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
all three ARE adjustableRate this question:
-
- 12.
Wavelength is determined by
- A.
Sound source
- B.
Medium
- C.
Both
Correct Answer
C. Both -
- 13.
As frequency increases, wavelength decreases
- A.
True
- B.
False
Correct Answer
A. True -
- 14.
Which type of wavelength sound produces higher quality images with greater detail?
- A.
Short
- B.
Long
- C.
Either one
Correct Answer
A. Short -
- 15.
Propagation speed is determined by
- A.
Sound source
- B.
Medium
- C.
Both
Correct Answer
B. Medium -
- 16.
What is the speed in liver?
- A.
1540 m/s
- B.
1450 m/s
- C.
1560 m/s
- D.
3500 m/s
Correct Answer
C. 1560 m/s -
- 17.
If the power of a wave is tripled the intensity is reduced to one third
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
remember , power is related to the intensity (pg.31)
so if power is tripled the intensity is tripled as wellRate this question:
-
- 18.
The effects of sound waves on tissue in the body are called?
- A.
Acoustic propagation properties
- B.
Bioeffects
Correct Answer
B. Bioeffects -
- 19.
The start of a pulse to the end of that pulse is reffering to ....
- A.
Spatial pulse length
- B.
Pulse repition period
- C.
Pulse repition frequency
- D.
Dulse duration
Correct Answer
D. Dulse duration -
- 20.
What is pulse duration's formula?
- A.
# of cycles x wavelength / frequency
- B.
Has no formula
- C.
# of cycles x wavelength
- D.
# of cycles / frequency
Correct Answer
D. # of cycles / frequency -
- 21.
Pulse duration is directly related to the frequency
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
pulse duration is INVERSELY proportional to the frequency
recall that pulse duration formula is # cycles / frequency
pg. 48Rate this question:
-
- 22.
What is spatial pulse length definition?
- A.
Distance that a pulse occupies in space from start to the end of a pulse
- B.
Time that a pulse occupies in space from start to the end of a pulse
- C.
Time from the start of a pulse to the start of the next pulse
- D.
The number of pulses that an ultrasound system transmits into the body each second
Correct Answer
A. Distance that a pulse occupies in space from start to the end of a pulse -
- 23.
Is pulse repition period (PRP) adjustable?
- A.
Yes
- B.
No
Correct Answer
A. Yes -
- 24.
Depth of view describes the minimum distance into the body that an ultrasound system is imaging
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
describes the MAXIMUM distanceRate this question:
-
- 25.
How are PRP and depth related?
- A.
Directly
- B.
Inversly
- C.
No relationship
Correct Answer
A. DirectlyExplanation
when PRP increases , depth of view increasesRate this question:
-
- 26.
With deeper imaging will the listening time lengthen?
- A.
Yes
- B.
No
- C.
Listening time has nothing to do with deep imaging
Correct Answer
A. Yes -
- 27.
PRF and frequency are related
- A.
True
- B.
False
Correct Answer
B. False -
- 28.
When the sonographer adjusts the depth of view to 30 cm, what happens to the pulse repetition frequency?
- A.
Reduced
- B.
Increased
Correct Answer
A. Reduced -
- 29.
Which of these values for PRF would have the longest PRP?
- A.
3 kHz
- B.
5,321 Hz
- C.
1 Hz
- D.
3 Hz
Correct Answer
C. 1 HzExplanation
the correct answer is C because the question asks for the longest PRP
since PRF and PRP are reciprocals you will have to look for the lowest PRFRate this question:
-
- 30.
What is the duty factors formula?
- A.
Pulse duration x 100
- B.
Pulse duration/ PRP
- C.
PRP x 100
- D.
Pulse duration / PRP x100
Correct Answer
D. Pulse duration / PRP x100 -
- 31.
What is the maximum values for duty factor?
- A.
1
- B.
1%
- C.
100
- D.
100%
Correct Answer(s)
A. 1
D. 100% -
- 32.
What occurs on shallow imaging on PRP?
- A.
Shorter PRP
- B.
Longer PRP
Correct Answer
A. Shorter PRP -
- 33.
The sonographer changes duty factor when imaging depth is altered
- A.
True
- B.
False
Correct Answer
A. True -
- 34.
What is the log of 100?
- A.
1
- B.
2
- C.
10
- D.
20
Correct Answer
B. 2Explanation
10 x 10 = 100Rate this question:
-
- 35.
What is the meaning of 3dB?
- A.
Ten times larger
- B.
Three times larger
- C.
Half
- D.
Doubled
Correct Answer
D. Doubled -
- 36.
When the boundary is smooth, the sound is reflected in only one direction in an organized matter is called
- A.
Diffue reflection
- B.
Specular
- C.
Scattering
- D.
Rayleigh scattering
Correct Answer
B. Specular -
- 37.
Diffuse reflection or back scattering is when the interfaces in the body are not smooth, but have some irregularities. when a wave reflects off an irregular surface, radiates in more than one direction
- A.
True
- B.
False
Correct Answer
A. True -
- 38.
The half value thickness is the distance that sound travels in a tissue that reduces the intensity of sound to one-third its original value.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
intensity of sound to ONE-HALF it original valueRate this question:
-
- 39.
The half value layer thickness depends on which factor(s)
- A.
The frequency of sound
- B.
Medium
- C.
Both
Correct Answer
C. Both -
- 40.
Water has
- A.
High attenuation
- B.
Low attenuation
- C.
Intermediate
- D.
Extremely low
Correct Answer
D. Extremely low -
- 41.
As path length decreases the attenuation of ultrasound in soft tissue
- A.
Decreases
- B.
Increases
- C.
Remains the same
Correct Answer
A. Decreases -
- 42.
Normal incidence is also called
- A.
Perpendicular, orthogonal, right angle, 90 degrees
- B.
Obtuse, acute, orthogonal, 90 degrees
- C.
Obtuse, 180 degrees, right angle, acute
- D.
Perpendicular, and obtuse
Correct Answer
A. Perpendicular, orthogonal, right angle, 90 degrees -
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Mar 20, 2022Quiz Edited by
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Feb 28, 2013Quiz Created by
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