EDELMAN SPI 2026 COMPREHENSIVE
EXAM WITH ACTUAL QUESTIONS AND
CORRECT ANSWERS GRADED A+
Sound waves are:
electrical
mechanical, transverse
spectral
longitudinal, mechanical Correct Answer longitudinal, mechanical
The speed of US in soft tissue is closest to:
1,540 km/sec
1.54 km/msec
1,500 m/s
1,540 mm/sec Correct Answer 1,500 m/s
The frequency closest to the lower limit of US is:
19,000 kHz
10,000 MHz
,20,000 msec
15,000 Hz Correct Answer 15,000 Hz
Which is not an acoustic variable?
density
pressure
distance
intensity Correct Answer intensity
The effects of soft tissue on US are called:
acoustic proliferation properties
dynamic effects
acoustic propagation properties
biologic effects Correct Answer acoustic propagation properties
All of the following are true EXCEPT:
Two waves with identical frequencies must interfere constructively
Constructive interference is associated with waves that are in-
phase
,Out-of-phase waves interfere destructively
Waves of different frequencies may exhibit both constructive and
destructive interference at different times Correct Answer Two
waves with identical frequencies must interfere constructively
Put in decreasing order:
deca
deci
micro
centi Correct Answer deca, deci, centi, micro
____ is the time to complete one cycle.
pulse duration
pulse period
period
duration period Correct Answer period
Which of the following sound waves is ultrasonic and least useful
in diagnostic imaging?
30KHz
, 8 MHz
8,000 Hz
3,000 kHz
15 Hz Correct Answer 30 KHz
What is the frequency of a wave with 1 msec period?
10,000 Hz
1,000 kHz
1 kHz
1MHz Correct Answer 1 kHz
____ is the distance covered by one cycle
pulse length
wavelength
cycle distance
cycle duration Correct Answer wavelength
Which of the following is determined by the source and the
medium?
EXAM WITH ACTUAL QUESTIONS AND
CORRECT ANSWERS GRADED A+
Sound waves are:
electrical
mechanical, transverse
spectral
longitudinal, mechanical Correct Answer longitudinal, mechanical
The speed of US in soft tissue is closest to:
1,540 km/sec
1.54 km/msec
1,500 m/s
1,540 mm/sec Correct Answer 1,500 m/s
The frequency closest to the lower limit of US is:
19,000 kHz
10,000 MHz
,20,000 msec
15,000 Hz Correct Answer 15,000 Hz
Which is not an acoustic variable?
density
pressure
distance
intensity Correct Answer intensity
The effects of soft tissue on US are called:
acoustic proliferation properties
dynamic effects
acoustic propagation properties
biologic effects Correct Answer acoustic propagation properties
All of the following are true EXCEPT:
Two waves with identical frequencies must interfere constructively
Constructive interference is associated with waves that are in-
phase
,Out-of-phase waves interfere destructively
Waves of different frequencies may exhibit both constructive and
destructive interference at different times Correct Answer Two
waves with identical frequencies must interfere constructively
Put in decreasing order:
deca
deci
micro
centi Correct Answer deca, deci, centi, micro
____ is the time to complete one cycle.
pulse duration
pulse period
period
duration period Correct Answer period
Which of the following sound waves is ultrasonic and least useful
in diagnostic imaging?
30KHz
, 8 MHz
8,000 Hz
3,000 kHz
15 Hz Correct Answer 30 KHz
What is the frequency of a wave with 1 msec period?
10,000 Hz
1,000 kHz
1 kHz
1MHz Correct Answer 1 kHz
____ is the distance covered by one cycle
pulse length
wavelength
cycle distance
cycle duration Correct Answer wavelength
Which of the following is determined by the source and the
medium?
