EDELMEN’S SPI REAL EXAM QUESTIONS AND ANSWERS 2025-2026|WELL STRUCTURED|
100% PASS
QUESTIONS ANSWERS
Sound waves are:
a) electric
b) mechanical, transverse D
c) spectral
d) longitudinal, mechanical
The speed of sound of ultrasound in soft
tissue is closest to:
a) 1,540 km/sec
C
b) 1.54 km/sec
c) 1,500 m/s
d) 1,540 mm/sec
Which is not an acoustic variable?
a) density
b) pressure D
c) distance
d) intensity
The effects of soft tissue on ultrasound
are called:
a) acoustic proliferation properties
C
b) dynamic effects
c) acoustic propagation properties
d) biological effects
All of the following are true EXCEPT:
a) two waves with identical frequencies
must interfere constructively.
b) constructive interference is associat-
ed with waves that are in-phase.
A
c) out-of-phase waves interfere destruc-
tively.
d) waves of different frequencies may
exhibit both constructive and destructive
interference at different times.
Put in decreasing order:
a) deca
b) deci abdc
c) micro
d) centi
,EDELMEN’S SPI REAL EXAM QUESTIONS AND ANSWERS 2025-2026|WELL STRUCTURED|
100% PASS
QUESTIONS ANSWERS
is the time to complete one cycle
a) pulse duration
b) pulse period C
c) period
d) duration period
Which of the following sound waves is
ultrasonic and least useful in diagnostic
imaging?
a) 30 KHz
A
b) 8 Mhz
c) 8,000 Hz
d) 3,000 Hz
e) 15 Hz
is the distance covered by one
cycle.
a) pulse length
B
b) wavelength
c) cycle distance
d) cycle duration
Which of the following is determined by
the source and the medium?
a) frequency
D
b) period
c) propagation speed
d) range resolution
Propagation speed = x wave-
length
a) pulse duration
D
b) period
c) # of cycles in the pulse
d) frequency
As a result of the propagation
speed increases.
a) increasing stiffness and increasing
C
density
b) increasing stiffness and increasing
elasticity
,EDELMEN’S SPI REAL EXAM QUESTIONS AND ANSWERS 2025-2026|WELL STRUCTURED|
100% PASS
QUESTIONS ANSWERS
c) decreasing compressibility and de-
creasing density
d) decreasing stiffness and decreasing
density.
Put in decreasing order of propagation
speed.
a) gas cba
b) liquid
c) solid
If the frequency of an ultrasound wave is
doubled, what happens to the period?
a) doubles
B
b) halved
c) remains the same
d) 4x greater
The units of pulse repetition frequency
are:
a) per minute
b) microseconds A
c) mm/microseconds
d) MHz
The time from the beginning of the pulse
to the end of that pulse is ?
a) period
b) pulse duration B
c) pulse length
d) PRF
What happens to the speed of sound in a
medium when the bulk modulus increas-
es?
a) faster A
b) slower
c) unchanged
resolution is determined by
the spatial pulse length
a) radial A or C
b) image
, EDELMEN’S SPI REAL EXAM QUESTIONS AND ANSWERS 2025-2026|WELL STRUCTURED|
100% PASS
QUESTIONS ANSWERS
c) axial
d) angular
If the wave's amplitude is doubles, what
happens to the power?
a) nothing
D
b) halved
c) doubled
d) quadrupled
If the level of acoustic variable ranges
from 55-105, what is the amplitude?
a) 105
25
b) 50
c) 25
d) 55
Power of sound has units of:
a) dB
b) dB/cm C
c) watts
d) watts/cm^2
If the intensity of a sound beam remains
unchanged while the beam area is re-
duced in half, what has happened to the
power?
C
a) quadrupled
b) doubled
c) halved
d) unchanged
Which of these intensities is the small-
est?
a) SATP C
b) SPTP
c) SATA
The duty factor for CW ultrasound is
a) 10.0
b) 1% C
c) 1.0
d) 0.0%
100% PASS
QUESTIONS ANSWERS
Sound waves are:
a) electric
b) mechanical, transverse D
c) spectral
d) longitudinal, mechanical
The speed of sound of ultrasound in soft
tissue is closest to:
a) 1,540 km/sec
C
b) 1.54 km/sec
c) 1,500 m/s
d) 1,540 mm/sec
Which is not an acoustic variable?
a) density
b) pressure D
c) distance
d) intensity
The effects of soft tissue on ultrasound
are called:
a) acoustic proliferation properties
C
b) dynamic effects
c) acoustic propagation properties
d) biological effects
All of the following are true EXCEPT:
a) two waves with identical frequencies
must interfere constructively.
b) constructive interference is associat-
ed with waves that are in-phase.
A
c) out-of-phase waves interfere destruc-
tively.
d) waves of different frequencies may
exhibit both constructive and destructive
interference at different times.
Put in decreasing order:
a) deca
b) deci abdc
c) micro
d) centi
,EDELMEN’S SPI REAL EXAM QUESTIONS AND ANSWERS 2025-2026|WELL STRUCTURED|
100% PASS
QUESTIONS ANSWERS
is the time to complete one cycle
a) pulse duration
b) pulse period C
c) period
d) duration period
Which of the following sound waves is
ultrasonic and least useful in diagnostic
imaging?
a) 30 KHz
A
b) 8 Mhz
c) 8,000 Hz
d) 3,000 Hz
e) 15 Hz
is the distance covered by one
cycle.
a) pulse length
B
b) wavelength
c) cycle distance
d) cycle duration
Which of the following is determined by
the source and the medium?
a) frequency
D
b) period
c) propagation speed
d) range resolution
Propagation speed = x wave-
length
a) pulse duration
D
b) period
c) # of cycles in the pulse
d) frequency
As a result of the propagation
speed increases.
a) increasing stiffness and increasing
C
density
b) increasing stiffness and increasing
elasticity
,EDELMEN’S SPI REAL EXAM QUESTIONS AND ANSWERS 2025-2026|WELL STRUCTURED|
100% PASS
QUESTIONS ANSWERS
c) decreasing compressibility and de-
creasing density
d) decreasing stiffness and decreasing
density.
Put in decreasing order of propagation
speed.
a) gas cba
b) liquid
c) solid
If the frequency of an ultrasound wave is
doubled, what happens to the period?
a) doubles
B
b) halved
c) remains the same
d) 4x greater
The units of pulse repetition frequency
are:
a) per minute
b) microseconds A
c) mm/microseconds
d) MHz
The time from the beginning of the pulse
to the end of that pulse is ?
a) period
b) pulse duration B
c) pulse length
d) PRF
What happens to the speed of sound in a
medium when the bulk modulus increas-
es?
a) faster A
b) slower
c) unchanged
resolution is determined by
the spatial pulse length
a) radial A or C
b) image
, EDELMEN’S SPI REAL EXAM QUESTIONS AND ANSWERS 2025-2026|WELL STRUCTURED|
100% PASS
QUESTIONS ANSWERS
c) axial
d) angular
If the wave's amplitude is doubles, what
happens to the power?
a) nothing
D
b) halved
c) doubled
d) quadrupled
If the level of acoustic variable ranges
from 55-105, what is the amplitude?
a) 105
25
b) 50
c) 25
d) 55
Power of sound has units of:
a) dB
b) dB/cm C
c) watts
d) watts/cm^2
If the intensity of a sound beam remains
unchanged while the beam area is re-
duced in half, what has happened to the
power?
C
a) quadrupled
b) doubled
c) halved
d) unchanged
Which of these intensities is the small-
est?
a) SATP C
b) SPTP
c) SATA
The duty factor for CW ultrasound is
a) 10.0
b) 1% C
c) 1.0
d) 0.0%
