Edelman SPI Comprehensive Exam /Edelman SPI
Exam Preparation/Edelman SPI Practice Exam With
Questions And Correct Answers| Newest Exam
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sound waves are? - Answer-longitudinal, mechanical
the speed of US in soft tissue is closest to: - Answer-1,500
m/s (1,540 m/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
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______________ is the time to complete one cycle -
Answer-period
which of the following sound waves is ultrasonic and least
useful in 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 source and the
medium? - Answer-range resolution
propagation speed = ________ x wavelength - Answer-
frequency
as a result of ____________ the propagation speed
increases - Answer-decreasing compressibility and
decreasing density
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put in decreasing order of propagation speed - Answer-
solid, liquid, gas
if the frequency of US is increased from 0.77 MHz to 1.54
MHz, what happens to the wavelength? - Answer-halved
a sound wave's frequency is 10MHz. the wave is traveling
in soft tissue. what is its wavelength? - Answer-0.15 mm
if the frequency of an US wave is doubled, what happens
to the period? - Answer-halved
if the frequency of US is increased from 0.77 MHz to 1.54
MHz, what happens to the propagation speed? - Answer-
remains the same
the units of pulse repetition frequency are? - Answer-per
minute
the time from the beginning of a pulse until its end is
__________? - Answer-pulse duration
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what happens to the speed of sound in a medium when
the bulk modulus of the medium increases? - Answer-
faster
____________ resolution is determined by the spatial
pulse length - Answer-axial/radial
if a wave's amplitude is doubled, what happens to the
power? - Answer-quadrupled
if the level of an acoustic variable ranges from 55 to 105,
what is the amplitude? - Answer-25
power of sound has units of? - Answer-watts
if the intensity of a sound beam remains unchanged while
the beam area is reduced in half, what has happened to
the power? - Answer-halved
which of these intensities is smallest? - Answer-SATA