10 Question UT quiz

1. As the acoustic impedance ratio between two materials approaches 1 the amount of sound reflected at an interface:

2. Resonance or standing waves are a result of:

3. The distance of a discontinuity from the ultrasonic transducer cannot be determined when using the:

4. Which type of test block is used to check horizontal linearity and the dB accuracy per requirements of AWS and AASHTO?

5. Snell’s Law describes the relationship between the sound velocity and:

6. The purpose of the backing material in a transducer is to:

7. A 6dB change in the measured ultrasonic signal strength indicates that the sound intensity changed by a factor of :

8. Air is not a good transmitter of ultrasound because:

9. Which of the following media has the lowest velocity of ultrasound?

10. Which of the following could influence the behavior of a transducer?

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