Propagation speed - Study guides, Class notes & Summaries
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SPI PRACTICE QUESTIONS WITH 100% CORRECT ANSWERS ALREADY PASSED A+ 2024
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SPI PRACTICE QUESTIONS WITH 100% CORRECT ANSWERS ALREADY PASSED A+ 
2024 
Sound waves are: - ANS-longitudinal, mechanical 
The speed of sound in soft tissue is closest to: - ANS-1,500 m/s 
The frequency closest to the lower limit of ultrasound is: - ANS-15,000 Hz 
Which is not an acoustic variable? - ANS-intensity 
The effects of soft tissue on ultrasound are called: - ANS-acoustic propagation properties 
All of the following are true EXCEPT: - ANS-two waves with identical frequencies mus...
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ARDMS SPI Exam Review Guide Questions with 100% Correct Answers
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ARDMS SPI Exam Review Guide 
Questions with 100% Correct Answers 
Sound waves are: 
a) electric 
b) mechanical, transverse 
c) spectral 
d) longitudinal, mechanical - CORRECT ANSWER-D 
The speed of sound of ultrasound in soft tissue is closest to: 
a) 1,540 km/sec 
b) 1.54 km/sec 
c) 1,500 m/s 
d) 1,540 mm/sec - CORRECT ANSWER-C 
Which is not an acoustic variable? 
a) density 
b) pressure 
c) distance 
d) intensity - CORRECT ANSWER-D 
The effects of soft tissue on ultrasound are calle...
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Secure Wifi - Watchguard Test | Questions with 100 Correct Answers | Verified
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2.4 GHz wavelength - longer wavelengths, better range 
larger channel widths - provide faster speed and throughput but can create greater interference 
5 GHz wavelength - supports faster data rates at shorter distances, suited for high density 
deployments because of greater number of channels that do not overlap 
What channel widths do 2.4 GHz support? - 20 and 40 MHz 
What channel widths do 5 GHz support? - 20, 40, 80, 160 MHz 
omnidirectional antenna - Can transmit and receive with 360-degree...
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SPI ARDMS Exam – Questions & All Correct Answers (Rated A+)
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SPI ARDMS Exam – Questions & All Correct Answers (Rated A+) 
SPI ARDMS Exam – Questions & All Correct Answers (Rated A+) 
 
The time from the beginning of a pulse until its end is ______________? - ANSWER - pulsed duration 
 
What happens to the speed of sound in a medium when the bulk modulus of the medium increases? - ANSWER - faster 
 
___________ resolution is determined by SPL - ANSWER - radial or axial 
 
If a wave's amplitude is doubled, what happens to the power? - ANSWER - quad...
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ARDMS SPI STUDY GUIDE QUESTIONS & ANSWERS SCORED A+
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Spatial Pulse Length is directly proportional to - ️️the Number of Cycles in the 
Pulse 
and 
the Wavelength 
(Directly Proportional means that increased SPL will increase both the number of cycles 
in the pulse and the wavelength if increased). 
Spatial pulse length is inversely proportional to - ️️Frequency (MHz) 
(Inversely Proportional means that increased SPL will lower frequency. This is because 
axial resolution is better with lower frequency) 
In soft tissue, if the frequency of ...
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SPI Mock Exam (2024) || Complete Questions & Answers (Graded A+)
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SPI Mock Exam (2024) || Complete Questions & Answers (Graded A+) 
SPI Mock Exam (2024) || Complete Questions & Answers (Graded A+) 
 
The mechanical index predicts the likelihood of: 
 
A. Cavitation 
B. Aliasing 
C. Turbulence 
D. Doppler shift 
E. Thermal damage - ANSWER - A. Cavitation 
 
Mirror imaging artifact is a result of a(n): 
 
A. A weak reflector 
B. Strong reflector 
C. Impedance difference 
D. Weak attenuation structure 
E. Strong attenuating structure - ANSWER - B. Stro...
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SPI Board Practice Exam Questions and Answers Graded A 2024
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Which of the following is described as the ability of an object to resist compression and relates to the hardness of the medium? 
a. Stiffness 
b. Density 
c. Pressure 
d. Inertia -answer- a. Stiffness 
 
An increase in pulse repetition frequency would lead to: 
a. an increase in DF 
b. an increase in pulse duration 
c. an increase in the number of cycles 
d. a decrease in resolution -answer- a. an increase in DF 
? is this b/c PRP and PRF are reciprocals so if you increase PRF you decrease PRP...
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NSCA CPSS Exam 57 Questions with Verified Answers,100% CORRECT
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NSCA CPSS Exam 57 Questions with Verified Answers 
 
Understand the relevant theory and principles that underpin training. - CORRECT ANSWER Training Load model, Periodization, Parallel training model, Sequential Training Model, 
 
Periodization vs Programming - CORRECT ANSWER Periodization is a a macro-management strategy that serves as a training blueprint, from which periods of time are assigned that target specific skills, fitness, or performance related factors. Volume and intensity are inve...
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Test Bank For Data Communications and Computer Networks A Business User's Approach 8th Edition By Curt White
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Chapter 3: Conducted and Wireless Media 
 TRUE/FALSE 
1. Category 1 twisted pair wire is not recommended for transmitting megabits of computer data. ANS: T PTS: 1 REF: 63 
2. Category 1 wire is susceptible to experiencing noise and signal attenuation. ANS: T PTS: 1 REF: 63 
3. Category 1 twisted pair wire produces less noise and signal attenuation than Category 2. ANS: F PTS: 1 REF: 63 
4. Much of the Category 3 wire sold today is used for new computer network installations. ANS: F PTS: 1 REF: 6...
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SPI mock exam study questions and answers 2024
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Reducing the likelihood of bioeffects from acoustic energy is the mission of the: 
 
A. Nyquist limit 
B. Reynolds number 
C. Huygens principle 
D. ALARA principle 
E. Poiseuille principle -answer- D. ALARA principle 
 
The number of cycles in a pulse directly related to the: 
 
A. Duty factor 
B. SPL 
C. operating frequency 
D. PRF 
E. propagation speed of the medium -answer- B. SPL 
 
The Doppler shift frequency is proportional to the: 
 
A. Cosine values 
B. Doppler angle 
C. Operat...
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