728x90 반응형 엠티5 QUIZ) ASNT L3 MT 5 81. The coercive force the magnetic material whose hystersis loop is shown in figure.4 is given by the A. amplitude of flux density B at point 8 B. amplitude of flux density B at point E C. product of B and H at point B D. negative value of H at point C 82. On the initial magnetization curve the maximum permeability of the magnetic material is achivevd A. at the point of maximum slope on curve o.. 2020. 7. 21. 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 MT 1 1. The magnetic principle underlying circular magnetization with a central conductor is based on the fact that A. Circular(eddy) currents are induced by magnetic flux B. the "Hall effect" is applied in finding the "constant" for the L/D ratio C. there is a circular magnetic field surrounding any electrical conductor D. the direction of the magnetic flux lines is determined by the direction of th.. 2020. 6. 9. 이전 1 다음 728x90 반응형