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EPRI-UT-1
| Question | Answer |
|---|---|
| "1.The reference holes in standard area-amplitude ultrasonic test blocks contain: A. flat-bottomed holes. B. concave-surface holes. C. convex-surface holes. D. side-drilled holes. " | "A. flat-bottomed holes." |
| "2.The gradual loss of sonic energy as the ultrasonic vibrations travel through the material is referred to as: A. Reflection B. Refraction C. Mode conversion D. Attenuation " | D. Attenuation |
| "3.A term for many small indications on the CRT bottom from test part structure, numerous small discontinuities, or both is often referred to as: A. Multiple back reflections B. Multiple front reflections C. Grass D. Resonance " | C. Grass |
| "4. When testing a plate, increasing the frequency of an ultrasonic longitudinal wave will result in: A. an increase in its velocity. B. a decrease in its velocity. C. no change in its velocity. D. an increase in penetration. " | "C. no change in its velocity." |
| "4. When testing a plate, increasing the frequency of an ultrasonic longitudinal wave will result in: A. an increase in its velocity. B. a decrease in its velocity. C. no change in its velocity. D. an increase in penetration. " | "C. no change in its velocity." |
| "5. Ultrasonic waves transmitted into and received from the test material in the form of repetitive bursts of acoustic energy is called: A. Pulse-echo testing B. Continuous wave testing C. Resonance testing D. None of the above " | "A. Pulse-echo testing" |
| "6. Metal blocks which contain one or more drilled holes to simulate discontinuities are called: A. DAC blocks B. Crystal collimators C. Single plane angulators D. Reference standards " | "D. Reference standards" |
| "7. If a 3"" discontinuity in a 6"" thick plate lies parallel to the entry surface , it will be best detected by: A. a straight beam test. B. an angle beam test. C. a surface wave test. D. a lamb wave test. " | A. a straight beam test. |
| "8. The depth of a discontinuity cannot be determined when using: A. Straight beam testing method. B. Through transmission testing method. C. Angle beam testing method. D. Immersion testing method. " | B. Through transmission testing method. |
| "9. When inspecting coarse-grained material, which frequency will generate a scattered sound wave in the grain structure? A. 1.0 MHz B. 2.25 MHz C. 5.0 MHz D. 10 MHz " | " D. 10 MHz " |
| "10. Which of the following search units would contain the thickest crystal? A. A 1 megahertz search unit. B. A 5 megahertz search unit. C. A 15 megahertz search unit. D. A 25 megahertz search unit. " | "A. A 1 megahertz search unit. " |
| "11. When performing a surface wave test, indications may result from: A. Surface discontinuities B. Oil on the surface C. Dirt on the surface D. All three of the above " | "A. Surface discontinuities B. Oil on the surface C. Dirt on the surface D. All three of the above" |
| "12. Search units with a plastic wedge or standoff between the transducer element and the test piece are used for: A. Straight beam contact testing. B. Angle beam contact testing. C. Surface wave contact testing. D. All of the above. " | " A. Straight beam contact testing. B. Angle beam contact testing. C. Surface wave contact testing. D. All of the above. " |
| "13. A search unit containing three or more individual transducer elements is often referred to as a: A. Dual transducer B. Sandwich transducer C. Mosaic transducer D. Multi-element transducer " | "C. Mosaic transducer " |
| "14. Sound can be focused by means of special curved adapters located in front of the transducer element. These adapters are referred to as: A. Scrubbers B. Acoustic lenses C. Angle beam adapters D. Single plane adapters " | "B. Acoustic lenses " |
| "15. A test method in which the parts to be inspected are placed in a water bath or some other liquid couplant is called: A. Contact testing B. Immersion testing C. Surface wave testing D. Through transmission testing " | " B. Immersion testing " |
| "16. A separate time base line imposed on the viewing screen of some flaw detectors that permits measurement of distances is called: A. An initial pulse B. A time/distance line C. A marker or gate D. Through transmission testing " | "C. A marker or gate " |
| "17. The ability of an ultrasonic testing system to distinguish between the entry surface response and the response of discontinuities near the entry surface is: A. Sensitivity B. Penetration C. Segregation D. Resolution " | " D. Resolution " |
| "18. The phenomenon whereby an ultrasonic wave changes direction when the wave crosses a boundary between materials with different velocities is called: A. Refraction B. Reflection C. Penetration D. Rarefaction " | "A. Refraction " |
| "19. In a test where the transducer is not perpendicular to the inspection surface, the angle of incidence is equal to: A. The angle of refraction. B. The angle of reflection. C. The shear wave angle. D. The angle of rarefaction. " | "B. The angle of reflection. " |
| 20. In a material: the velocity of sound * material density gives the amount of reflection or transmission of sound at an interface. Normally called: A. Acoustic impedance B. Velocity C. Wave length D. Penetration | "A. Acoustic impedance " |
| "21. Ultrasonic waves that travel along the surface of a material and whose particle motion is elliptical are called: A. Shear waves B. Transverse waves C. Longitudinal waves D. Rayleigh waves " | "D. Rayleigh waves " |
| "22. The interference field near the face of a transducer is often referred to as the: A. Fresnel zone. B. Acoustic impedance. C. Exponential field. D. Phasing zone. " | " A. Fresnel zone. " |
| "23. When the incident angle is chosen to be between the first and second critical angles, the ultrasonic wave mode within the part will be a: A. Longitudinal wave B. Shear wave C. Surface wave D. Lamb wave " | "B. Shear wave " |
| "24. The formula used to calculate the angle of refraction within a material is called: A. Fresnel's law B. Fraunhofer's law C. Snell's law D. Lamb's law " | "C. Snell's law " |
| "25. In a material with a given velocity, when frequency is increased, the wavelength will: A. Not be effected B. Increase C. Decrease D. Double " | "C. Decrease " |
| "26. Which circuit increases the return signal magnitude from transducer and modifys the signals to display? A. Pulser circuits B. DAC circuits C. Timer circuits D. Receiver-amplifier circuits " | D. Receiver-amplifier circuits |
| "27. What is the most common type of data display used for ultrasonic examination of welds? A. An A-scan display B. A B-scan display C. A C-scan display D. An x-y plot " | "A. An A-scan display " |
| "28. Which is a plot of signal amplitude versus time? A. An A-scan display B. A B-scan display C. A C-scan display D. None of the above " | "A. An A-scan display " |
| "29. Which circuit generates a burst of energy which is applied to the sending transducer? A. Pulser B. Receiver-amplifier C. Damping D. Clock " | " A. Pulser " |
| "30. Which circuit coordinates operation of the entire ultrasonic instrument system? A. Damping B. Receiver-amplifier C. Clock D. Power supply " | "C. Clock " |
| "31. A plan view display or recording of a part under examination is called: A. An A-scan presentation. B. A B-scan presentation. C. A C-scan presentation. D. An X-Y plot. " | "C. A C-scan presentation. " |
| "32. Ultrasonic data which is presented in a form representative of the cross-section of the test specimen is called: A. An A-scan presentation. B. A B-scan presentation. C. A C-scan presentation. D. An X-Y plot. " | "B. A B-scan presentation. " |
| "33. What type of ultrasonic examination uses wheel-type search units to eliminate the use of a tank? A. Through transmission testing. B. Contact testing. C. Resonance testing. D. Immersion testing. " | "D. Immersion testing. " |
| 34. In immersion testing, to verify the search unit is normal to a flat entry surface is indicated by: A. Maximum reflection of the entry surface B. Elimination of water multiples C. Proper wavelength D. Maximum amplitude of initial pulse | A. Maximum reflection of the entry surface |
| "35. Natural quartz crystal disadvantage in a search unit is that: A. It is water soluble. B. There are better UT generating materials. C. It is mechanically and electrically unstable. D. It loses operating characteristics with ages. " | B. There are better UT generating materials. |
| 37. When testing by the surface wave method, patches of oil or dirt on the surface may: A. Block all sound. B. Attenuate the sound. C. Have no effect on the test. D. Cause both an attenuation of sound and indications on the screen. | " C. Obtain a common reproducible signal. " |
| "38. In immersion testing, the most commonly used couplant is: A. Water B. Oil C. Glycerine D. Alcohol " | "A. Water " |
| "39. Which of the following frequencies will produce the shortest wavelength pulse? A. 1.0 megahertz B. 25 megahertz C. 10 megahertz D. 5 megahertz " | "B. 25 megahertz " |
| "40. ""100,000 cycles per second"" can be written: A. 10 kilohertz B. 100 kilohertz C. 100 MHz D. 0.1 kilohertz. " | "B. 100 kilohertz " |
Created by:
urbergpm9276
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