Davies spi Physical principles Exam 2026
Questions and Answers
The mass you are imaging has a diameter of 35MM. The value can also be
expressed as:
A. 350 cm
B. 0.35 cm
C. 3.5 cm
D. 35 m
E. 3.5 - Correct answer-C. 3.5 cm
Relative measurement based on a logarithmic scale is expressed in:
A. Newtons per centimeter squared
B. Watts per centimeter squared
C. dB
D. Pa
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,C. Neper - Correct answer-C. dB
Which prefix equals 10^-3
A. Micro
B. Milli
C. Mega
D. Centi
E. None of the above - Correct answer-B. Milli
When you change the transmit frequency, which of the following is altered?
A. Displacement amplitude of the particles in the medium
B. Speed at which the sound waves propagate through the medium
C. Number of cycles per second
D. Pulse is transmitted per second
E. Number of an electrical impulses applied to the transducer per second - Correct
answer-C. Number of cycles per second
While performing a Doppler ultrasound examination, you adjust pulse repetition
frequency to 12 kHz this can also be expressed as:
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,A. 0.12
B. 1200 hz
C. 1.2 MHz
D. 12,000 hz
E. 120 MHz - Correct answer-D. 12,000 hz
In soundwave propagation, a region of elevated pressure is termed:
A. Compression
B. Demodulation
C. Rarefaction
D: period
E. Resonance - Correct answer-A. Compression
When you switch a 2.5 MHz to a 5 MHz transducer, the wavelength:
A. Doubles
B. Quadruples
C. Halves
D. Quarters
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, E. Is unaffected - Correct answer-C. Halves
Wavelength depends on two factors?
A. Frequency and amplitude
B. Amplitude and propagation speed
C. Period and frequency
D. Frequency in propagation speed
E. Amplitude and intensity - Correct answer-D. Frequency and propagation speed
Which of the following human tissues have the highest rate of attenuation of an
ultrasound wave?
A. Liver
B. Fat
C fluid
D. Lung
E blood vessel - Correct answer-D. Lung
The propagation speed for sound is lowest in which of the following biological
tissues
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Questions and Answers
The mass you are imaging has a diameter of 35MM. The value can also be
expressed as:
A. 350 cm
B. 0.35 cm
C. 3.5 cm
D. 35 m
E. 3.5 - Correct answer-C. 3.5 cm
Relative measurement based on a logarithmic scale is expressed in:
A. Newtons per centimeter squared
B. Watts per centimeter squared
C. dB
D. Pa
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,C. Neper - Correct answer-C. dB
Which prefix equals 10^-3
A. Micro
B. Milli
C. Mega
D. Centi
E. None of the above - Correct answer-B. Milli
When you change the transmit frequency, which of the following is altered?
A. Displacement amplitude of the particles in the medium
B. Speed at which the sound waves propagate through the medium
C. Number of cycles per second
D. Pulse is transmitted per second
E. Number of an electrical impulses applied to the transducer per second - Correct
answer-C. Number of cycles per second
While performing a Doppler ultrasound examination, you adjust pulse repetition
frequency to 12 kHz this can also be expressed as:
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,A. 0.12
B. 1200 hz
C. 1.2 MHz
D. 12,000 hz
E. 120 MHz - Correct answer-D. 12,000 hz
In soundwave propagation, a region of elevated pressure is termed:
A. Compression
B. Demodulation
C. Rarefaction
D: period
E. Resonance - Correct answer-A. Compression
When you switch a 2.5 MHz to a 5 MHz transducer, the wavelength:
A. Doubles
B. Quadruples
C. Halves
D. Quarters
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, E. Is unaffected - Correct answer-C. Halves
Wavelength depends on two factors?
A. Frequency and amplitude
B. Amplitude and propagation speed
C. Period and frequency
D. Frequency in propagation speed
E. Amplitude and intensity - Correct answer-D. Frequency and propagation speed
Which of the following human tissues have the highest rate of attenuation of an
ultrasound wave?
A. Liver
B. Fat
C fluid
D. Lung
E blood vessel - Correct answer-D. Lung
The propagation speed for sound is lowest in which of the following biological
tissues
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