SPI MOCK EXAM | FREQUENTLY TESTED QUESTIONS WITH CORRECT ANSWERS | BRAND NEW!

Page 1 of 154


SPI MOCK EXAM | FREQUENTLY TESTED
QUESTIONS WITH CORRECT ANSWERS |
BRAND NEW!




A sound wave's frequency is 10 MHz. The wave is traveling in soft
tissue. What is the wavelength?


A. 0.15 mm
B. 1.54 mm
C. 15.4 mm
D. 0.77 mm
E. 10 MHz - ✔✔✔ Correct Answer > A. 0.15 mm


❤ How much bigger is a billion than a million?


A. 10 times
B. 100 times
C. 1,000 times
D. 500 times - ✔✔✔ Correct Answer > C. 1,000 times

,Page 2 of 154


If the frequency of an US wave is doubled, What happens to the
period?


A. Doubles
B. Halves
C. Remains the same
D. 4 times greater - ✔✔✔ Correct Answer > B. Halves


If the frequency of an US is increased from 0.77 MHz to 1.54 MHz,
What happens to propagation speed?


A. Doubles
B. Halves
C. Remains the same
D. 4 times greater - ✔✔✔ Correct Answer > C. Remains the same


The units of pulse repetition frequency are?


A. Per minute
B. Msec
C. mm/us
D. MHx - ✔✔✔ Correct Answer > A. Per minute

,Page 3 of 154




The time from the beginning of a pulse until it's end is ______?


A. Period
B. Pulse duration
C. Pulse length
D. PRF - ✔✔✔ Correct Answer > B. Pulse duration


What happens to the speed of sound in a medium, When the bulk
modulus of the medium increases?


A. Faster
B. Slower
C. unchanged - ✔✔✔ Correct Answer > A. Faster


_______ resolution is determined by the spatial pulse length?


A. Radial
B. Image
C. Axial
D. Angular - ✔✔✔ Correct Answer > A. Radial
or

, Page 4 of 154


C. Axial


If a wave's amplitude is doubled, what happens to the power?


A. Nothing
B. Halved
C. Doubled
D. Quadrupled - ✔✔✔ Correct Answer > D. Quadrupled


Powering of sound has units of?


A. dB
B. dB/cm
C. Watts
D. Watts/cm^2 - ✔✔✔ Correct Answer > C. 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