SPI PRACTICE Questions and Answers (100%
Correct Answers) Already Graded A+
All of the following are true of sound waves EXCEPT:
a. regions of rarefaction are associated with lower
pressure and lower density
b. sound waves can create bio effects
c. they are comprised of rarefaction and compression
d. sound waves carry energy from one location to another
e. they are mechanical, transverse waves [ Ans: ] e. they
are mechanical, transverse waves
Which of the following choices best describes an ideal
epidemiologic bio effects study?
a. ideal and non-biased
b. retrospective and optimized
c. benefits outweigh the risks
d. randomized and prospective
e. prudent and safe [ Ans: ] d. randomized and
prospective
,Which of these terms means "many gray shades"
a. highly compressed signals
b. high contrast
c. few choices
d. bistable
e. wide dynamic range [ Ans: ] e. wide dynamic range
All of the following artifacts place the erroneous reflection
below the true reflector EXCEPT
a. comet tail
b. reverberation
c. side lobe
d. mirror image
e. ring down [ Ans: ] d. mirror image
All of the following statements are true regarding
temporal resolution EXCEPT:
a. decreased temporal resolution is associated with a
shorter pulse duration
, b. increased temporal resolution is associated with a
higher PRF
c. increased line density is associated with diminished
temporal resolution
d. improved temporal resolution occurs with a narrow
sector
e. diminished temporal resolution is related to multi
focusing [ Ans: ] a. decreased temporal resolution is
associated ith a shorter pulse duration
All of the following are limitations of analog scan
converters EXCEPT:
a. instability
b. image flicker
c. image deterioration over time
d. low spatial resolution
e. image fade [ Ans: ] d. low spatial resolution
Under which of the following conditions is axial resolution
improved?
a. decreased pixel size
b. decreased pulse amplitude
Correct Answers) Already Graded A+
All of the following are true of sound waves EXCEPT:
a. regions of rarefaction are associated with lower
pressure and lower density
b. sound waves can create bio effects
c. they are comprised of rarefaction and compression
d. sound waves carry energy from one location to another
e. they are mechanical, transverse waves [ Ans: ] e. they
are mechanical, transverse waves
Which of the following choices best describes an ideal
epidemiologic bio effects study?
a. ideal and non-biased
b. retrospective and optimized
c. benefits outweigh the risks
d. randomized and prospective
e. prudent and safe [ Ans: ] d. randomized and
prospective
,Which of these terms means "many gray shades"
a. highly compressed signals
b. high contrast
c. few choices
d. bistable
e. wide dynamic range [ Ans: ] e. wide dynamic range
All of the following artifacts place the erroneous reflection
below the true reflector EXCEPT
a. comet tail
b. reverberation
c. side lobe
d. mirror image
e. ring down [ Ans: ] d. mirror image
All of the following statements are true regarding
temporal resolution EXCEPT:
a. decreased temporal resolution is associated with a
shorter pulse duration
, b. increased temporal resolution is associated with a
higher PRF
c. increased line density is associated with diminished
temporal resolution
d. improved temporal resolution occurs with a narrow
sector
e. diminished temporal resolution is related to multi
focusing [ Ans: ] a. decreased temporal resolution is
associated ith a shorter pulse duration
All of the following are limitations of analog scan
converters EXCEPT:
a. instability
b. image flicker
c. image deterioration over time
d. low spatial resolution
e. image fade [ Ans: ] d. low spatial resolution
Under which of the following conditions is axial resolution
improved?
a. decreased pixel size
b. decreased pulse amplitude
