SPI Practice Final Exam (2026/2027) –
Sonography Principles &
Instrumentation | Actual Exam Questions
with Verified Solutions | ARDMS®
Certification Preparation
A _______ is a B mode operation that provides a cross section of the region of interest
as the sound beam sweeps through the region of interest: -CORRECTANSWER B scan
A "bin" in Doppler spectral analysis represents a: -CORRECTANSWER velocity range
A 3 bit matrix has a gray shade capacity of: -CORRECTANSWER 8
A 5 MHz transducer used in a pulse-echo system will generally produce: -
CORRECTANSWER a wide band of frequencies centered at 5 MHz
A 6 bit memory can represent how many shades of gray? -CORRECTANSWER 64
A binary digit is called a: -CORRECTANSWER bit
A binary word is called a: -CORRECTANSWER byte
,A change in the frequency of sound relative to the motion of the source and/or the
observer is known as the Doppler: -CORRECTANSWER shift
A continuous wave transducer is 12 mm. the sound beam width at two near zone length
is: -CORRECTANSWER 12 mm
A continuous wave unfocused transducer is 12 mm. The sound beam width at one near
zone length is: -CORRECTANSWER 6 mm
A digital scan converter: -CORRECTANSWER a computer memory
A display that is limited to only black and white, with no other shades of gray is called -
CORRECTANSWER bistable
A Doppler spectrum below the baseline represents blood flow: -CORRECTANSWER
away from the transducer
A hydrophone is used to measure: -CORRECTANSWER acoustic energy
A method used to unwrap a PW aliased signal is: -CORRECTANSWER zero baseline
shift
A perimeter measurement is a measure of: -CORRECTANSWER distance
,A picture element which may hold a binary digit/shade of gray: -CORRECTANSWER
pixel
A reflection will be placed at the correct depth because the ultrasound machine will
utilize the _________ equation: -CORRECTANSWER range
A region of high pressure is called? -CORRECTANSWER compression
A region of low density is called? -CORRECTANSWER rarefaction
A region that is anechoic is displayed as: -CORRECTANSWER echo-free
A shorter pulse duration: -CORRECTANSWER increases the bandwidth of a transducer
A way to decrease period, pulse duration, wavelength, spatial pulse length, and improve
axial resolution is: -CORRECTANSWER increase frequency
A way to decrease spatial pulse length and pulse duration is: -CORRECTANSWER
damping
According to the Reynold's equation, if viscosity increases: -CORRECTANSWER
turbulence decreases
, Acoustic speckle is caused by: -CORRECTANSWER destructive and constructive
interference
All of the following are related except:
intensity, amplitude, beam area, power, frequency -CORRECTANSWER frequency
All of the following determine the percentage of reflection except:
frequency, angle of incidence, acoustic impedance, acoustic impedance mismatch -
CORRECTANSWER frequency
All of the following may be used to express the speed of sound in soft tissue except:
1.54 km/s, 15400 cm, 1.54 mm/microsec, 1540 m/s -CORRECTANSWER 15400 cm
All of the following will effect propagation speed except:
density, stiffness, bulk modulus, period -CORRECTANSWER period
An artifact that would least likely produce a pseudo-mass is: -CORRECTANSWER
comet-tail
Sonography Principles &
Instrumentation | Actual Exam Questions
with Verified Solutions | ARDMS®
Certification Preparation
A _______ is a B mode operation that provides a cross section of the region of interest
as the sound beam sweeps through the region of interest: -CORRECTANSWER B scan
A "bin" in Doppler spectral analysis represents a: -CORRECTANSWER velocity range
A 3 bit matrix has a gray shade capacity of: -CORRECTANSWER 8
A 5 MHz transducer used in a pulse-echo system will generally produce: -
CORRECTANSWER a wide band of frequencies centered at 5 MHz
A 6 bit memory can represent how many shades of gray? -CORRECTANSWER 64
A binary digit is called a: -CORRECTANSWER bit
A binary word is called a: -CORRECTANSWER byte
,A change in the frequency of sound relative to the motion of the source and/or the
observer is known as the Doppler: -CORRECTANSWER shift
A continuous wave transducer is 12 mm. the sound beam width at two near zone length
is: -CORRECTANSWER 12 mm
A continuous wave unfocused transducer is 12 mm. The sound beam width at one near
zone length is: -CORRECTANSWER 6 mm
A digital scan converter: -CORRECTANSWER a computer memory
A display that is limited to only black and white, with no other shades of gray is called -
CORRECTANSWER bistable
A Doppler spectrum below the baseline represents blood flow: -CORRECTANSWER
away from the transducer
A hydrophone is used to measure: -CORRECTANSWER acoustic energy
A method used to unwrap a PW aliased signal is: -CORRECTANSWER zero baseline
shift
A perimeter measurement is a measure of: -CORRECTANSWER distance
,A picture element which may hold a binary digit/shade of gray: -CORRECTANSWER
pixel
A reflection will be placed at the correct depth because the ultrasound machine will
utilize the _________ equation: -CORRECTANSWER range
A region of high pressure is called? -CORRECTANSWER compression
A region of low density is called? -CORRECTANSWER rarefaction
A region that is anechoic is displayed as: -CORRECTANSWER echo-free
A shorter pulse duration: -CORRECTANSWER increases the bandwidth of a transducer
A way to decrease period, pulse duration, wavelength, spatial pulse length, and improve
axial resolution is: -CORRECTANSWER increase frequency
A way to decrease spatial pulse length and pulse duration is: -CORRECTANSWER
damping
According to the Reynold's equation, if viscosity increases: -CORRECTANSWER
turbulence decreases
, Acoustic speckle is caused by: -CORRECTANSWER destructive and constructive
interference
All of the following are related except:
intensity, amplitude, beam area, power, frequency -CORRECTANSWER frequency
All of the following determine the percentage of reflection except:
frequency, angle of incidence, acoustic impedance, acoustic impedance mismatch -
CORRECTANSWER frequency
All of the following may be used to express the speed of sound in soft tissue except:
1.54 km/s, 15400 cm, 1.54 mm/microsec, 1540 m/s -CORRECTANSWER 15400 cm
All of the following will effect propagation speed except:
density, stiffness, bulk modulus, period -CORRECTANSWER period
An artifact that would least likely produce a pseudo-mass is: -CORRECTANSWER
comet-tail
