SPI Comprehensive Mock Exam Questions with all the
correct answers Updated 2024
Sound waves are:
A. Electric
B. Mechanical, transverse
C. Spectral
D. Longitudinal, mechanical
Longitudinal, mechanical
The speed of US in soft tissue is closest to:
A. 1.540 km/sec
B. 1.54 km/section
C. 1,500 m/s
D. 1,540 mm/sec
1,500 m/s
The frequency closest to the lower limit of US is:
A. 19,000 kHz
B. 10,000 MHz
C. 20,000 msec
D. 15,000 Hz
15,000 Hz
Which is NOT an acoustic variable?
A. Density
B. Pressure
C. Distance
D. Intensity
Intensity
The effects of soft tissue on US are called:
A. Acoustic proliferation properties
B. Dynamic effects
C. Acoustic propagation properties
D. Biological effects
Acoustic propagation properties
All of the following are true EXCEPT:
A. Two waves with identical frequencies must interfere constructively
B. Constructive interference is associated with waves that are in-phase
C. Out-of-phase waves interfere destructively
D. Waves of different frequencies may exhibit both constructive and destructive
interference at difference times
Two waves with identical frequencies must interfere constructively
Put in decreasing order:
A. Deca
B. Deci
C. Micro
D. Centi
,Deca, Deci, Centi, Micro
__________ is the time to complete one cycle.
A. Pulse duration
B. Pulse period
C. Period
D. Duration period
Period
Which of the following sound waves is US and least useful in diagnostic
imaging?
A. 30 KHz
B. 8 MHz
C. 8,000 Hz
D. 3,000 kHz
E. 15 Hz
30 KHz
What is the frequency of a wave with 1 msec period?
A. 10,000 Hz
B. 1,000 kHz
C. 1 kHz
D. 1 MHz
1 kHz
__________ is the distance covered by one cycle.
A. Pulse length
B. Wavelength
C. Cycle distance
D. Cycle duration
Wavelength
Which of the following is determined by the source and medium?
A. Frequency
B. Period
C. Propagation speed
D. Range resolution
Range resolution
Propagation speed = ________ x wavelength
A. Pulse duration
B. Period
C. Number of cycles in pulse
D. Frequency
Frequency
As a result of __________ the propagation speed increases.
A. Increasing stiffness & increasing density
B. Increasing stiffness & increasing elasticity
C. Decreasing compressibility & decreasing density
D. Decreasing stiffness & decreasing density
Decreasing compressibility & decreasing density
,Put in decreasing order of propagation speed.
A. Gas
B. Liquid
C. Solid
Solid, liquid, gas
If the frequency of US is increased from 0.77 MHz to 1.54 MHz, what happens to
the wavelength?
A. Doubles
B. Halved
C. Remains the same
D. 4 times greater
Halved
A sound wave's frequency is 10 MHz. The wave is traveling in soft tissue. What is
its wavelength?
A. 0.15 mm
B. 1.54 mm
C. 15.4 mm
D. 0.77 mm
E. 10 MHz
0.15 mm
If the frequency of an US wave is doubled, what happens to the period?
A. Doubles
B. Halved
C. Remains the same
D. 4 times greater
Halved
If the frequency of US is increased from 0.77 MHz to 1.54 MHz, what happens to
the propagation speed?
A. Doubles
B. Halved
C. Remains the same
D. 4 times greater
Remains the same
The units of pulse repetition frequency are:
A. Per minute
B. Msec
C. Mm/us
D. MHx
Per minute
The time from the beginning of a pulse until its end is __________?
A. Period
B. Pulse duration
C. Pulse length
D. PRF
Pulse duration
, What happens to the speed of sound in a medium when the bulk modules of the
medium increases?
A. Faster
B. Slower
C. Unchanged
Faster
__________ resolution is determined by the spatial pulse length.
A. Radial
B. Image
C. Axial
D. Angular
Radial OR axial
If a wave's amplitude is doubled, what happens to the power?
A. Nothing
B. Halved
C. Doubled
D. Quadrupled
Quadrupled
Power of sound has units of:
A. dB
B. dB/cm
C. Watts
D. Watts/cm2
Watts
If the intensity of a sound beam remains unchanged while the beam area is
reduced in half, what has happened to the power?
A. Quadrupled
B. Doubled
C. Halved
D. Unchanged
Halved
Which of these intensities is smallest?
A. SATP
B. SPTP
C. SATA
SATA
The duty factor for continuous wave US is:
A. 10.0
B. 1%
C. 1.0
D. 0.0%
1.0
What is the minimum value of the duty factor?
A. 10.0
B. 1%
correct answers Updated 2024
Sound waves are:
A. Electric
B. Mechanical, transverse
C. Spectral
D. Longitudinal, mechanical
Longitudinal, mechanical
The speed of US in soft tissue is closest to:
A. 1.540 km/sec
B. 1.54 km/section
C. 1,500 m/s
D. 1,540 mm/sec
1,500 m/s
The frequency closest to the lower limit of US is:
A. 19,000 kHz
B. 10,000 MHz
C. 20,000 msec
D. 15,000 Hz
15,000 Hz
Which is NOT an acoustic variable?
A. Density
B. Pressure
C. Distance
D. Intensity
Intensity
The effects of soft tissue on US are called:
A. Acoustic proliferation properties
B. Dynamic effects
C. Acoustic propagation properties
D. Biological effects
Acoustic propagation properties
All of the following are true EXCEPT:
A. Two waves with identical frequencies must interfere constructively
B. Constructive interference is associated with waves that are in-phase
C. Out-of-phase waves interfere destructively
D. Waves of different frequencies may exhibit both constructive and destructive
interference at difference times
Two waves with identical frequencies must interfere constructively
Put in decreasing order:
A. Deca
B. Deci
C. Micro
D. Centi
,Deca, Deci, Centi, Micro
__________ is the time to complete one cycle.
A. Pulse duration
B. Pulse period
C. Period
D. Duration period
Period
Which of the following sound waves is US and least useful in diagnostic
imaging?
A. 30 KHz
B. 8 MHz
C. 8,000 Hz
D. 3,000 kHz
E. 15 Hz
30 KHz
What is the frequency of a wave with 1 msec period?
A. 10,000 Hz
B. 1,000 kHz
C. 1 kHz
D. 1 MHz
1 kHz
__________ is the distance covered by one cycle.
A. Pulse length
B. Wavelength
C. Cycle distance
D. Cycle duration
Wavelength
Which of the following is determined by the source and medium?
A. Frequency
B. Period
C. Propagation speed
D. Range resolution
Range resolution
Propagation speed = ________ x wavelength
A. Pulse duration
B. Period
C. Number of cycles in pulse
D. Frequency
Frequency
As a result of __________ the propagation speed increases.
A. Increasing stiffness & increasing density
B. Increasing stiffness & increasing elasticity
C. Decreasing compressibility & decreasing density
D. Decreasing stiffness & decreasing density
Decreasing compressibility & decreasing density
,Put in decreasing order of propagation speed.
A. Gas
B. Liquid
C. Solid
Solid, liquid, gas
If the frequency of US is increased from 0.77 MHz to 1.54 MHz, what happens to
the wavelength?
A. Doubles
B. Halved
C. Remains the same
D. 4 times greater
Halved
A sound wave's frequency is 10 MHz. The wave is traveling in soft tissue. What is
its wavelength?
A. 0.15 mm
B. 1.54 mm
C. 15.4 mm
D. 0.77 mm
E. 10 MHz
0.15 mm
If the frequency of an US wave is doubled, what happens to the period?
A. Doubles
B. Halved
C. Remains the same
D. 4 times greater
Halved
If the frequency of US is increased from 0.77 MHz to 1.54 MHz, what happens to
the propagation speed?
A. Doubles
B. Halved
C. Remains the same
D. 4 times greater
Remains the same
The units of pulse repetition frequency are:
A. Per minute
B. Msec
C. Mm/us
D. MHx
Per minute
The time from the beginning of a pulse until its end is __________?
A. Period
B. Pulse duration
C. Pulse length
D. PRF
Pulse duration
, What happens to the speed of sound in a medium when the bulk modules of the
medium increases?
A. Faster
B. Slower
C. Unchanged
Faster
__________ resolution is determined by the spatial pulse length.
A. Radial
B. Image
C. Axial
D. Angular
Radial OR axial
If a wave's amplitude is doubled, what happens to the power?
A. Nothing
B. Halved
C. Doubled
D. Quadrupled
Quadrupled
Power of sound has units of:
A. dB
B. dB/cm
C. Watts
D. Watts/cm2
Watts
If the intensity of a sound beam remains unchanged while the beam area is
reduced in half, what has happened to the power?
A. Quadrupled
B. Doubled
C. Halved
D. Unchanged
Halved
Which of these intensities is smallest?
A. SATP
B. SPTP
C. SATA
SATA
The duty factor for continuous wave US is:
A. 10.0
B. 1%
C. 1.0
D. 0.0%
1.0
What is the minimum value of the duty factor?
A. 10.0
B. 1%
