728x90 반응형 ASNT L320 QUIZ) ASNT L3 BASIC 2 21. Weld spatter is caused by (spatter -> undercut) a. arc blow, excessive current, wet electrodes b. arc blow, excessive current, alternating current c. low-hydrogen filler, reduced travel speed d. low magnetic retention excessive current, wet electrodes 22. In the making of seamless or electric resistance welded (ERW) pipe or tubing the discontinuities are oriented a. transverse to the pipe or.. 2020. 7. 23. QUIZ) ASNT L3 UT 1 1. Which of the following is not basic information available through ultrasonic examination A. The location of the discontinuity in the weld cross section can be estimated B. The orientation, and to some degree, the shape of the discontinuity can be determined by comparing signal size when tested from different directions C. The returned signal amplitude is a measure of the height of the discont.. 2020. 7. 21. BASIC differences between SNT-TC-1A, CP-189 (비교)6 2020. 7. 8. QUIZ) ASNT L3 UT 13 241. Rough surfaces cause the echo amplitude from discontinuities with in the part to a. increase b. decrease c. not change d. change frequency 242. When a sound beam travels from a liquid Into a metal through a contoured surface the sound team inside the metal will a. have the phase velocities of the first symmetrical and asymmetrical modes b. have the Phase velocity of the incident longitudina.. 2020. 6. 24. QUIZ) ASNT L3 UT 12 221. The sensitivity of an ultrasonic test system a. depends on the search unit, pulser, and amplifier used b. decreases as the frequency is increased c. increases as the resolution increases d. Is not related to mechanical damping or the transducer 222. The ability of a test system to separate the front-surface echo and the echo from a small discontinuity just below the surface a. depends prima.. 2020. 6. 24. QUIZ) ASNT L3 UT 11 201. A point, line or surface of a vibrating body marked by absolute or relative freedom from vibratory motion is referred to as A. a node B. a finger C. length D. depth 202. ultrasonic testing of castings usually requires A. high frequency transducers B. lower frequency transducers C. delay tip transducers D. transducer bubbler system 203. A notch type reference standard for tubing should be ma.. 2020. 6. 24. QUIZ) ASNT L3 UT 10 181. For a longitudinal immersion test, an automatic scanner is set to scan at 50cm/sec with a pulse repetition rate of 500 pulses per second and the water path is 25cm over an aluminum plate. Assuming an effective beam diameter of 0.220cm at the depth of the flaw, on the average how many effective interrogation would be made during one scan over a flaw equivalent to a flat-bottomed hole 0.0397c.. 2020. 6. 24. QUIZ) ASNT L3 UT 9 160. testing is usually accomplished by A. a crystal generating a face-shear type of energy B. angulation of the transducer above the first critical angle, but below second critical angle C. a transverse length expansion crystal D. a crystal with a thickness shear type of ~~~ 161. In the phased array technique, the effect produced when one transducer pulses: then after a brief delay a second tra.. 2020. 6. 24. QUIZ) ASNT L3 UT 8 141. velocity is A. a vector of phase propagation B. a vector representing angular phase preparation C. speed of propagation D. varying with grain size 142. Counter bores close to the weld can produce signals that may be interpreted as A. Back wall reflection of the base metal surface B. lamination in the base metal C. lack of fusion / penetration D. weld face reinforcement 143. When calibration.. 2020. 6. 24. QUIZ) ASNT L3 UT 7 121. An application appropriate for wall thichness measurement near surface A. focused angle probe B. standard single crystal probe C. TR probes D. high frequency vertical probe 122. Inspection of oil rings is prescribed in codes written by A. AWS B. ASTM C. ASME D. Nuclear Regulatory Committee 123. A circular disk flay much smaller than the wave length A. is likely to miss detection B. will ref.. 2020. 6. 24. 이전 1 2 다음 728x90 반응형
