728x90 반응형 inspection202 QUIZ) ASNT L3 BASIC 4 61. with which of the following is the term "rockwell" associates? a. index of metal machinability b. tensile testing c. strain gauges d. indentation hardness testing 62. metal fatigue is most likely to be found in structures a. loaded under constant high stress b. having undergone a substantial overload c. subject to cyclic vibratory or stress reversal loads d. loaded in constant tension 63. In.. 2020. 7. 8. QUIZ) ASNT L3 BASIC 3 41. The velocity of sound in steel a. is greater frequency increase b. is lower than the velocity of sound in water c. changes if mode conversion occurs d. is dependent of the reflection factor 42. In an acoustic emission test, the sensor has a resonant frequency of 150 KHz and the speed of sound is measured as 3000m/s. The wavelength at the sensor frequency is a. 0.05mm b. 20mm c. 20M d. 450M 4.. 2020. 7. 8. BASIC differences between SNT-TC-1A, CP-189 (비교)6 2020. 7. 8. QUIZ) ASNT L3 MT 4 61. Which of the following would be most applicable for the detection of sub-surface flaws in a high permeability welded structure? A. Wet fluorescent-AC B. Dry visible-FWDC C. Dry visible-HWDC D. Wet fluorescent-DC 62. Which of the statements below are not typically employed to prevent or minimize prod marks on parts A. Use padded prods B. Reduce prod spacing and magnetizing current C. Make sur.. 2020. 6. 26. QUIZ) ASNT L3 MT 3 41. The bulk indicator is designed and normally used for an assessment of magnetic leakage fields as a practical check on the external demagnetization state of an object. The indicators commonly used for checking external field levels after a magnetic particle test normally have a range of about 1 to 2mT (10 to 20 Gauss). Positive and negative readings represent which pole? A. Positive readings .. 2020. 6. 26. QUIZ) ASNT L3 MT 2 21. When establishing a magnetic particle procedure for a part to be used in a specific application, there are many parameters that should be included in the procedure. Of the items listed below, which one has no appreciable effect on the inspection results? A. Type of magnetic particles B. Type and amount of applied current C. Direction of magnetizing field D. Reference to applicable standards .. 2020. 6. 26. 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. 이전 1 ··· 14 15 16 17 18 19 20 21 다음 728x90 반응형
