MT Level 2 Exam Questions And Answers Verified 100% Correct

MT Level 2 Exam Questions And Answers Verified 100% Correct The general term used to refer to a break in the metallic continuity of the part being tested is: - ANSWER discontinuity A rough forging discontinuity has the following characteristics: can occur on surface or internally; is associated with low temperature processing;is often caused by excessive working; and creates cavities varying in size. How would it be identified? - ANSWER Burst If a current of the same amperage is passed through two conductors of the same dimensions, one of which is magnetic and one of which is nonmagnetic, the magnetic field surrounding the conductors will: - ANSWER be the same for both conductors A rough forging that has received no further processing is magnetic particle tested. An indication is observed to run in every direction. It appears to extend deeply into the part and perpendicular to the surface. It is very sharp. What is the probable identity of the indication? - ANSWER Forging burst Internal splines and holes drilled parallel to or near test surfaces will cause: - ANSWER broad, fuzzy indications directly aligned with the part's internal contours Which of the following can cause non-relevant magnetic particle indications? - ANSWER All of the above (joints between dissimilar metals, brazed joints, and roughing tool cuts on the surface) The pattern of iron powder sprinkled on a paper placed over a bar magnet is called a: - ANSWER magnetograph The lines of force that form a path around a crack in a ring magnet are called: - ANSWER leakage flux Which one of the following is not a discontinuity common to rolled products? - ANSWER Cold shuts Materials which are repelled magnetically are called: - ANSWER diamagnetic Where particles are attracted to a site on the surface of a part by a magnetic leakage field which is due to a condition such as a crack, lap, or other condition not acceptable to the applicable standards for the part, then we have: - ANSWER a defect Nonrelevant indications due to residual local poles interfere with magnetic particle testing. For a successful examination one should: - ANSWER demagnetize then remagnetize in the desired direction The unit of measure of one line of flux per square centimeter of area is one: - ANSWER Gauss The ability of matter to attract other matter to itself is a phenomenon associated with: - ANSWER magnetism Of the following discontinuity categories, which one is considered most detrimental to the service life of an item? - ANSWER Cracks open to the surface A prime consideration when selecting a powder to be used as a magnetic particle medium is to select a powder that: - ANSWER provides a high contrast to the surface being tested What wattage is most commonly used for mercury vapor bulbs for portable fluorescent magnetic particle inspection? - ANSWER 100 watts A coil shot is required to be performed after a head shot using the wet continuous method. In order to properly conduct the coil shot it is: - ANSWER place the part in the coil and continue the inspection after evaluating the head shot indications A general rule to use for determining the detectability of surface discontinuities by magnetic particle inspection is that: - ANSWER the depth should be at least five times the width of the opening of the defect at the surface When it is believed that a defect has been removed by chipping, grinding, or flame cutting, the next operation is to: - ANSWER reexamine the area by magnetic particle testing An example of a irrelevant indication that would be classed as a magnetic irregularity rather than an actual discontinuity could be caused by: - ANSWER an abrupt change in the hardness of part When adding concentrate to any wet magnetic particle suspension liquid it is common practice: - ANSWER both of the above (to add powder directly to the suspension liquid, and to make a small slurry-like test mixture of powder) Forging laps occur in what relation to the axial direction of a part? - ANSWER May occur anywhere on surface and may bear no relation to axial direction of the part Materials which are strongly attracted to a magnet are called: - ANSWER ferromagnetic The accumulation of particles at a site on the part surface, collected at and held to the site by the magnetic leakage field, is called: - ANSWER an indication Why are large soft contact areas such as lead or copper braid used for surfaces or headstocks? - ANSWER To increase the contact area and reduce the possibility of burning the part External poles which are too strong to permit good inspection of a part are more likely to result when using: - ANSWER longitudinal magnetization What type of magnetization uses the formula: Ampere-turns = 45,000/(L/D)? - ANSWER Longitudinal If one-inch and two-inch diameter bars were magnetized by passing the same current through them, the magnetic fields would be: - ANSWER stronger in the one-inch diameter bar Some limitations of coil magnetization techniques are that: - ANSWER all of the above Cold working indications will not reappear if the part is: - ANSWER retested after stress relieving Since the magnetic lines of force within a bar magnet run the length of the bar, it is said to be: - ANSWER longitudinally magnetized A break in the magnetic uniformity of a part that is called a magnetic discontinuity is related to a sudden change in: - ANSWER permeability The interpretation of magnetic particle indications may be aided by: - ANSWER all of the above A large forging is repaired by welding. Magnetic particle inspection of the repair weld reveals an irregular indication running parallel with the weld passes. It is located near the center of the bead and starts and ends by turning off slightly from the axial direction. This indication is indicative of: - ANSWER weld shrinkage cracks Discontinuities in plate, sheet, or strip caused by pipe, inclusions, or blowholes in the original ingot which after rolling are usually flat and parallel to the outside surface are called: - ANSWER laminations The detection of deep-lying defects in heavy weldments (1/4 inch to 2 inches below surface) is: - ANSWER very improbable