| 51. | Which of the following is the best reason why the application of emulsifier by a brush is not recommended? |
| A. | The brushing action mixes the emulsifier with the penetrant prematurely and irregularly, making accurate control of the |
| emulsification time impossible | |
| B. | Brushing does not always completely coat the part, thereby leaving a portion of the part difficult to wash |
| C. | Brushing in itself is not harmful, but many types of brush materials combine with the emulsifier agents resulting in penetrant and part contamination. (answer) |
| D. | Brushing results in a streaking appearance during inspection |
| 52. | Developing powder should always be: |
| A. | Highly fluorescent |
| B. | Applied wet |
| C. | Colorless |
| D. | Evenly applied (answer) |
| 53. | A crack type discontinuity will generlly appear as: |
| A. | A round indication |
| B. | A continuous line, either straight or jagged (answer) |
| C. | A straight, single solid line |
| D. | Random round or elongated holes |
| 54. | Which of the following methods for applying non-aqueous developer is normally considered most effective? |
| A. | Spraying (answer) |
| B. | Swabbing |
| C. | Brushing |
| D. | Dipping |
| 55. | Which of the following could be a source of false indications on a test specimen? |
| A. | Penetrant on the test table |
| B. | Penetrant on the hands of the inspector |
| C. | Contamination of dry or wet developer with penetrant |
| D. | All of the above (answer) |
| 56. | Which of the following discontinuities might be found in sand castings? |
| A. | In complete penetration |
| B. | Undercut |
| C. | Pipe |
| D. | Shrinkage (answer) |
| 57. | The part is an aluminum casting . Desricption– the casting has a very complex design. In one section there is a flat area having a thickness of 1/8 inch. In the center of this area is a round section 2 inches thick and 1 inch diameter. There are linear indications about 1/2 the distance around the base where it joins into the thin section. the indicationsis termed: |
| A. | Dross |
| B. | Hot tear (answer) |
| C. | Microshrinkage |
| D. | Porosity |
| 58. | When penetrant testing for shallow discontinuities using a post-emulsification penetrant, the emulsification time should be long enough to: |
| A. | Mix the emulsifier with all the penetrant on the surface and in |
| discontinuities (answer) | |
| B. | Mix the emulsifier with penetrant in the discontinuities |
| C. | Allow the emulsifier to dry out to a white powder |
| D. | Mix the emulsifier with the excess surface penetrant only |
| 59. | The function of the emulsifier in the post-emulsification penetrant method is to: |
| A. | More rapidly drive the penetrant into deep, tight cracks |
| B. | React with the surface penetrant to make the penetrant water-washable (answer) |
| C. | Add fluorescent dye or pigment to the penetrant |
| D. | Provide a coating to which dry powder developer can adhere |
| 60. | The speed with which a penetrant penetrates a surface flaw is influenced to the greatest extent by which of the following properties? |
| A. | Density |
| B. | Surface tension and wetting ability (answer) |
| C. | Viscosity |
| D. | Relative weight |
| 61. | Which of the following discontinuities could be classified as a primary processing discontinuity often found in cast material? |
| A. | Fatigue crack |
| B. | Stress-corrosion |
| C. | Porosity (answer) |
| D. | Lack of penetration |
| 62. | Penetrant residues may become entrapped under splines, fasteners, rivets, etc. Which of the following is the most likely reaction caused by such a residue? |
| A. | Corrosion caused by the moisture attracted by such residues (answer) |
| B. | Paint stripping |
| C. | Fatigue cracking |
| D. | Lattice structure breakdown |
| 63. | Which of the following characteristics are normally considered when selecting the type of penetrant to be used in a penetrant test? |
| A. | Removal characteristics of the penetrant |
| B. | The flash point of the penetrant |
| C. | The cost of the penetrant |
| D. | All of the above (answer) |
| 64. | Developer assists in the detection of the visible dye penetrant test method by: |
| A. | Providing a clean surface |
| B. | Providing a contrasting background (answer) |
| C. | Providing a dry surface |
| D. | Emulsifying the penetrant bleed-out |
| 65. | Rejection or acceptance of parts should be based on which of the following, in the absence of written acceptance criteria? |
| A. | The inspector’s education |
| B. | The design of the part and its intended application (answer) |
| C. | The appropriate penetrant standard |
| D. | The selection of the penetrant |
| 66. | Shrinkage cracks are usually found in what areas of a casting? |
| A. | Thin sections only |
| B. | Heavy sections only |
| C. | Abrupt changes in thickness (answer) |
| D. | No longer a problem |
| 67. | The tendency of a liquid penetrant to enter a discontinuity is primarily related to: |
| A. | The viscosity of the penetrant |
| B. | The capillary forces (answer) |
| C. | The chemical inertness of the penetrant |
| D. | The specific gravity of the penetrant |
| 68. | The term ” non-relevant indication” is used to describe certain types of penetrant testing indications. which of the following would be a typical non-relevant indication? |
| A. | Indications due to part geometry or part design configurations (answer) |
| B. | Nonmagnetic indications |
| C. | Multiple indications |
| D. | Non-linear indications |
| 69. | The part is a 1/2 inch thick aluminum plate with a vee weld. description- the indication appears in an area that is somewhat dish-shaped. the indication extends out from the center in a spoke formation. the indication is: |
| A. | Shrinkage |
| B. | Non-relevant (answer) |
| C. | A quench crack |
| D. | A crater crack |
| 70. | A continuous line indication can be caused by which of the following discontinuities? |
| A. | Porosity |
| B. | Slag inclusions |
| C. | Pitting |
| D. | Cracks (answer) |
| 71. | Which of the following is most apt to render the post-emulsification test ineffective? |
| A. | Too long of a penetrant time |
| B. | Too long of a developing time |
| C. | Too long of an emulsifying time (answer) |
| D. | None of the above |
| 72. | Which of the following discontinuities could be classified as a finishing processing discontinuity? |
| A. | Fatigue crack |
| B. | Stress-corrosion |
| C. | Lamination (answer) |
| D. | Heat treat crack |
| 73. | A commonly used method of checking on the overall performance of a penetrant material system is by: |
| A. | Determining the viscosity of the penetrant |
| B. | Measuring the wettability of the penetrant |
| C. | Comparing two sections of artificially cracked specimens |
| D. | All of the above (answer) |
| 74. | Which of the following is an advantage of visible dye over fluorescent penetrants? |
| A. | Small indications are easily seen |
| B. | They can be used on anodized and chromate surfaces |
| C. | They make less background on rough surfaces |
| D. | No special lighting is required (answer) |
| 75. | Prior to penetrant testing to a previously machined soft metal part, which of the cleaning methods listed below would be best to remove any smeared metal that could mask discontinuities? |
| A. | Etching |
| B. | Shot peening (answer) |
| C. | Alkaline cleaning |
| D. | Water cleaning with detergents |
| 76. | Which of the following discontinuities might be found in rolled bar stock? |
| A. | Shrinkage |
| B. | Bleedout |
| C. | Laps (answer) |
| D. | Undercut |
AMARINE 
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