Across
- 3. In a pulse-echo instrument, the component that produces the voltage that activates the search unit is called:
- 5. The distance from a given point on an ultrasonic wave to the next corresponding point is referred to as:
- 10. A term used in ultrasonics to express the rate at which sound waves pass through various substances is:
- 12. The energy loss that occurs in all materials is called:
- 17. The motion of particles in a shear wave is:
- 19. Where does beam divergence occur
- 20. A term used to describe the ability of an ultrasonic testing system to distinguish between the entry surface response and response of discontinuities near the entry surface is:
- 23. The process of adjusting an instrument or device to a reference standard is called
- 24. In an A-scan presentation, the horizontal line formed on the CRT is called:
- 27. The property of certain materials to transform electrical energy to mechanical energy and vice versa is called:
- 28. The change in direction of an ultrasonic beam when it passes from one medium to another whose velocity differs from that of the first medium is called:
- 29. Ultrasonic waves that travel along the surface of a material and whose particle motion is elliptical are called:
Down
- 1. In a liquid medium, the only mode of vibration that can exist is:
- 2. In an A-scan presentation, the horizontal baseline represents:
- 4. Metal blocks which contain one or more drilled holes to simulate discontinuities are called:
- 6. Which control on the UT instrument adjusts the amplitude of the signal on the display screen?
- 7. Another name for a Rayleigh wave is:
- 8. The indication on the display screen which represents the far boundary of the material being tested is called:
- 9. In a basic ultrasonic test pattern (A-scan) for contact testing (assuming no sweep delay is used), the initial pulse:
- 11. In the far field of a uniform ultrasonic beam, sound intensity is ___________ the beam centerline.
- 13. What law can be used to calculate the angle of refraction within a metal for both longitudinal and shear waves?
- 14. Another name for the Fresnel Zone is:
- 15. Moving a search unit over a test surface either manually or automatically is referred to as:
- 16. The interference field near the face of a transducer is often referred to as the:
- 18. A material used between the face of a search unit and the test surface to permit or improve the transmission of ultrasonic vibrations from the search unit to the material being tested is called:
- 21. Which scan type can be used to produce a recording of flaw areas superimposed over a plan view of the test part?
- 22. The phenomenon by which a wave strikes a boundary and changes the direction of propagation within the same material is referred to as:
- 25. The boundary between two different materials which are in contact with each other is called:
- 26. As transducer diameter decreases, the beam spread: