UT Level II General|114 Exam Review Questions And Answers
Material testing, thickness measurement, various material property measurement - ️️The main uses/reasons for Ultrasonic Inspection. Quantities measured by UT - ️️Time for sound to travel and amplitude of recieved signal. Ultrasound - ️️Any sound wave with a frequency above the range of human hearing. Wavelength - ️️The distance traveled in one cycle of an ultrasonic wave. Lambda - ️️The Greek symbol for wavelength. period - ️️The time for one cycle to occur. velocity - ️️Distance/unit time. The speed at which sound travels through a medium. Frequency - ️️What is the rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second? Frequency is determined by what? - ️️The crystal thickness of the transducer. The thinner the crystal, the higher the frequency. In UT frequency is expressed by what? - ️️Kilohertz (thousands of cycles per second) and Megahertz (millions of cycles per second.
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