SPI MOCK EXAM
When the ELASTICITY of a medium is HIGH, the _____ is HIGH
- stiffness
- prop. speed
- compressibility
- reflectivity - CORRECT ANSWER-compressibility
What term describes the # of cycles that an acoustic variable completes in a
second?
- period
- freq.
- PRP
- variable rate - CORRECT ANSWER-freq.
What happens to venous flow return to the HEART when a person INHALES? -
CORRECT ANSWER-increases
What establishes the freq. of an US wave?
- transducer
- medium through which sound travels
- both
- neither - CORRECT ANSWER-transducer
Which of the following tasks is NOT performed by the receiver of an US sx?
- rectification
- smoothing
- compression
- degaussing - CORRECT ANSWER-degaussing
Which of the following is NOT a potential mechanism for the production of
bioeffects from US exposure to the body?
, - temp. elevation
- fractionation
- cavitation
- vibration - CORRECT ANSWER-fractionation
Which of the following terms does NOT belong with the others?
- increased DOV
- increased DF
- increased PRP
- decreased PRF - CORRECT ANSWER-increased DF
Which of the following is NOT one of the physical processes that contributes to
attenuation of US waves passing through soft tissue?
- reflection
- redirection of sound in many directions
- focusing
- conversion of acoustic energy to heat - CORRECT ANSWER-focusing
According to AIUM, at which IN SITU tissue temp. is there danger to a fetus?
- 100 C
- 98.6 F
- 1 F over normal temp.
- 41 C - CORRECT ANSWER-41 C
2 sound pulses travel through the SAME medium. One wave's freq. is 2 MHz and
the other 10 MHz.
Which pulse has a LOWER PROP. SPEED?
- 10 MHz pulse
- 2 MHz pulse
- neither
- cannot be determined - CORRECT ANSWER-neither
What is the SMALLEST part of a DIGITAL picture called?
When the ELASTICITY of a medium is HIGH, the _____ is HIGH
- stiffness
- prop. speed
- compressibility
- reflectivity - CORRECT ANSWER-compressibility
What term describes the # of cycles that an acoustic variable completes in a
second?
- period
- freq.
- PRP
- variable rate - CORRECT ANSWER-freq.
What happens to venous flow return to the HEART when a person INHALES? -
CORRECT ANSWER-increases
What establishes the freq. of an US wave?
- transducer
- medium through which sound travels
- both
- neither - CORRECT ANSWER-transducer
Which of the following tasks is NOT performed by the receiver of an US sx?
- rectification
- smoothing
- compression
- degaussing - CORRECT ANSWER-degaussing
Which of the following is NOT a potential mechanism for the production of
bioeffects from US exposure to the body?
, - temp. elevation
- fractionation
- cavitation
- vibration - CORRECT ANSWER-fractionation
Which of the following terms does NOT belong with the others?
- increased DOV
- increased DF
- increased PRP
- decreased PRF - CORRECT ANSWER-increased DF
Which of the following is NOT one of the physical processes that contributes to
attenuation of US waves passing through soft tissue?
- reflection
- redirection of sound in many directions
- focusing
- conversion of acoustic energy to heat - CORRECT ANSWER-focusing
According to AIUM, at which IN SITU tissue temp. is there danger to a fetus?
- 100 C
- 98.6 F
- 1 F over normal temp.
- 41 C - CORRECT ANSWER-41 C
2 sound pulses travel through the SAME medium. One wave's freq. is 2 MHz and
the other 10 MHz.
Which pulse has a LOWER PROP. SPEED?
- 10 MHz pulse
- 2 MHz pulse
- neither
- cannot be determined - CORRECT ANSWER-neither
What is the SMALLEST part of a DIGITAL picture called?
