728x90 반응형 ASNT L3 BASIC23 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. QUIZ) ASNT L3 BASIC 6 101. Producing a product by powder metallurgy involves mixing of powders compacting the a. Melting b. Sintering c. forging d. Extruding 102. Through what mechanism does heat treating when properly performed remove work-hardened properties? a. local remelting b. Recrystallization c. local plastic flow d. diffusion of more dense elements to the grain boundaries 103. Comparing the frequency ranges .. 2020. 6. 9. 이전 1 2 3 다음 728x90 반응형