SPI mock exam| 106 questions| with complete solutions

Reducing the likelihood of bioeffects from acoustic energy is the mission of the: A. Nyquist limit B. Reynolds number C. Huygens principle D. ALARA principle E. Poiseuille principle CORRECT ANSWERS: D. ALARA principle The number of cycles in a pulse directly related to the: A. Duty factor B. SPL C. operating frequency D. PRF E. propagation speed of the medium CORRECT ANSWERS: B. SPL The Doppler shift frequency is proportional to the: A. Cosine values B. Doppler angle C. Operating frequency D. Velocity of the reflector E. Propagation speed if the medium CORRECT ANSWERS: D. Velocity of the reflector In the Fraunhofer zone, the beam: A. Width diverges B. Is conical in shape C. Intensity is greatest D. Intensity is inconsistent E. Widens towards the focal zone CORRECT ANSWERS: A. Width diverges Artifacts consisting of parallel equally spaced lines are characteristic of: A. Multipath B. Grating lobes C. Reverberation D. Range ambiguity E. Acoustic shadowing CORRECT ANSWERS: C. Reverberation An increase in reflection amplitudes