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SPI Practice Test Questions with correct answers.
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SPI Practice Test Questions with correct answers.
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SPI Practice Test Questions with correctanswers
Which nnof nnthe nnfollowing nndo nnthe nnsource nnand nnthe nnmedium nndetermine?
a. nnduty nnfactor
b. nnfrequency
c. nnpropagation nnspeed
d. nnaxial nnresolution nn- nncorrect nnanswer-d.
Axial nnresolution nnis nnaffected nnby nnall nnof nnthe nnfollowing nnEXCEPT
a. nnfrequency
b. nndamping
c. nnspatial nnpulse nnlength
d. nnfocusing nn- nncorrect nnanswer-d.
Damping nnin nna nntransducer
a. nnreduces nnthe nnnumber nnof nncycles nnin nna nnpulse nnand nnincreases nnthe nnquality nnfactor
b. nnincreases nnthe nnnumber nnof nncycles nnin nna nnpulse nnand nnincreases nnpenetration
c. nncauses nnpoor nnaxial nnand nnlateral nnresolution
d. nnreduces nnthe nnduty nnfactor nnand nnincreases nnthe nnrange nnof nntransmitted nnfrequencies nn- nncorrect
nnanswer-d.
Far nnzone nnbeam nndivergence nncan nnbe nnreduced nnon nna nnsingle-element nntransducer nnby nnusing
a. nna nntransducer nnwith nna nnsmaller nnelement nndiameter
,b. nna nnhigher nnfrequency nntransducer
c. nna nnlower nnfrequency nntransducer nnor nna nnsmaller nnelement nndiameter
d. nnadjustable nnfocusing nn- nncorrect nnanswer-b.
The nnarea nnbetween nnthe nnface nnof nnan nnunfocused nnsingle-element nntransducer nnand nnthe nnpoint nnwhere
nnthe nnbeam nnstarts nnto nndiverge nnis nnthe
a. nnFraunhofer nnzone
b. nnrefraction nnzone
c. nnfocal nnzone
d. nnnear nnzone nn- nncorrect nnanswer-d.
Assuming nna nnfixed nnfrequency, nnwhat nnhappens nnif nnthe nndiameter nnof nnan nnunfocused nntransducer nnis
nnincreased?
a. nnthe nnfar nnzone nndivergence nnincreases
b. nnthe nnpenetration nndecreases
c. nnthe nnlength nnof nnthe nnnear nnzone nnincreases
d. nnthe nnlength nnof nnthe nnnear nnzone nndecreases nn- nncorrect nnanswer-c.
Which nnof nnthe nnfollowing nndoes nnNOT nnaffect nnlateral nnresolution?
a. nnfocusing
b. nnelement nndiameter
c. nnfrequency
d. nnbandwidth nn- nncorrect nnanswer-d.
Higher nnfrequency nntransducers nnprovide
,a. nnimproved nnlateral nnresolution
b. nnsmaller nnDoppler nnshifts
c. nnimproved nnaxial nnresolution nnand nnreduced nnattenuation
d. nnincreased nnpenetration nn- nncorrect nnanswer-a.
Ultrasound nnwaves nnthat nnare nntraveling nnthrough nna nnmedium nnconsist nnof
a. nnelectromagnetic nnand nnradio nnfrequencies
b. nncompressions nnand nnrefractions
c. nnelectromagnetic nnand nnionizing nnfrequencies
d. nncompressions nnand nnrarefactions nn- nncorrect nnanswer-d.
What nnis nnthe nndifference nnbetween nnaudible nnsound nnand nnultrasound?
a. nnaudible nnsound nnwaves nncan nntravel nnthrough nna nnvacuum
b. nnaudible nnsound nnhas nna nnhigher nnfrequency
c. nnultrasound nnhas nna nnhigher nnfrequency
d. nnultrasound nnwaves nnare nnionizing nn- nncorrect nnanswer-c.
A nndecrease nnin nnthe nnthickness nnof nna nnpiezoelectric nnelement nnwill nnresult nnin
a. nna nngreater nnpulse nnduration
b. nnan nnincrease nnin nnthe nnpropagation nnspeed
c. nna nndecrease nnin nnthe nnquality nnfactor nnif nnthe nnbandwidth nndecreases
d. nnan nnincrease nnin nnthe nnfrequency nnof nnthe nntransducer nn- nncorrect nnanswer-d.
The nnresonant nnfrequency nnof nna nnpulsed-wave nnultrasound nntransducer nnis nndependent nnon
a. nndamping
, b. nnthe nnbacking nnmaterial
c. nnthe nnthickness nnof nnthe nnpiezoelectric nnelement nnand nnthe nnspeed nnof nnsound nnthrough nnthe
nnpiezoelectric nnelement
d. nnthe nnamplitude nnof nnthe nnvoltage nnapplied nnto nnthe nnpiezoelectric nnelement nn- nncorrect nnanswer-c.
The nnimage nnis nnbrighter nnat nnthe nnlevel nnof nnthe nnfocal nnzone. nnWhich nnof nnthe nnfollowing nncontrols nnis nnbest
nnto nncorrect nnthis?
a. nnoverall nngain
b. nnTGC
c. nnacoustic nnpower
d. nnPRF nn- nncorrect nnanswer-b.
If nnthe nnfrequency nnis nndoubled,
a. nnthe nnduty nnfactor nnwill nnincrease
b. nnthe nnperiod nnwill nndouble
c. nnthe nnwavelength nnwill nndouble
d. nnthe nnwavelength nnwill nnbe nnone-half nn- nncorrect nnanswer-d.
The nntypical nnrange nnof nnpulse nnrepetition nnfrequencies nnin nna nnpulse-echo nnultrasound nnsystem nnis
a. nn2,000 nnHz nnto nn20,000 nnHz
b. nn20 nnMHz nnto nn200 nnMHz
c. nn20,000 nnHz nnto nn200,000 nnHz
d. nn1,000 nnHz nnto nn2,000 nnHz nn- nncorrect nnanswer-d.
If nnthe nnnumber nnof nncycles nnin nna nnpulse nnis nnreduced,
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