SPI PRACTICE QUESTIONS WITH COMPLETE SOLUTIONS

SPI PRACTICE QUESTIONS WITH COMPLETE SOLUTIONS Sound waves are: - ANSlongitudinal, mechanical The speed of sound in soft tissue is closest to: - ANS1,500 m/s The frequency closest to the lower limit of ultrasound is: - ANS15,000 Hz Which is not an acoustic variable? - ANSintensity The effects of soft tissue on ultrasound are called: - ANSacoustic propagation properties All of the following are true EXCEPT: - ANStwo waves with identical frequencies must interfere constructively Put in decreasing order: deci, deca, micro, centi - ANSdeca, deci, centi micro ______________ is the time to complete one cycle - ANSperiod Which of the following sound waves is ultrasonic and least useful? - ANS30 KHz What is the frequency of a wave with a 1 msec period? - ANS1 KHz ______________ is the distance covered by one cycle - ANSwavelength Which of the following is determined by the source and the medium? - ANSrange resolution Propagation speed = ______________ x wavelength - ANSfrequency As a result of ______________, the propagation speed increases - ANSdecreasing compressibility and density Put in decreasing order of propagation speed: gas, liquid, solid - ANSsolid, liquid, ga