Ultrasound Physics - Mock Exam Questions for SPI || Complete Questions & Answers (Rated A+)

Ultrasound Physics - Mock Exam Questions for SPI || Complete Questions & Answers (Rated A+) Ultrasound Physics - Mock Exam Questions for SPI || Complete Questions & Answers (Rated A+) What are the units of power? a. millimeters b. Hertz c. Watts/cm squared d. meters/sec e. Watts - ANSWER - Watts The Power in a beam is 1 watt and the area is 5cm^2. What is the beams intensity? a. 5 w/cm^2 b. 1 w/cm^2 c. 0.2 w/cm^2 d. 1 watt - ANSWER - 0.2 w/cm^2 If the intensity remains the same, while the power is doubled, what happens to the beam area? a. quadrupled b. doubled c. halved d. unchanged - ANSWER - doubled What happens to the speed of sound when the bulk modulus increases? a. faster b. slower c. remains the same - ANSWER - Faster Which of the foloowing waves will have the shortest wavelength? a. low frequency in a fast medium b. low frequency in a slow medium c. high frequency in a fast medium d. high frequency in a slow medium - ANSWER - high frequency in a slow medium Sound waves are: a. electric b. mechanichal, transverse c. spectral d. longitudinal, mechanical - ANSWER - Mechanical, Transverse The speed of sound in soft tissue is closest to: a. 1,540 km/s b. 1.54 km/ms c. 1,500 m/s d. 1,540 mm/sec - ANSWER - 1,500 m/s The frequency closest to the lower limit of US is: a. 19,000 kHz b. 10,000 MHz c. 20,000 msec d. 15,000 Hz - ANSWER - 15,000 Hz Which of the following transducers will have the worst axial resolution? a. Vector array, 3 MHz b. Linear Sequential Array, 6 MHZ c. Linear Phased Array 7.5 MHZ d. Annular Array, 6 MHz - ANSWER - Vector array, 3 MHz A sound wave is traveling in the body and propagates from muscle to air. What percentage of the sound wave is most likely reflected at the muscle-air boundary?