| 31. | Which of the following is not a good practice when penetrant testing? |
| A. | Applying emulsifier by dipping the part in emulsifier |
| B. | Appling developer by spraying the part with developer |
| C. | Removal of water-washable penetrant with a water spray |
| D. | Applying emulsifier with a brush (answer) |
| 32. | Dry developer should be applied : |
| A. | So that a heavy coat of developer covers all surfaces |
| B. | So that a light dusting covers all surfaces to be inspected (answer) |
| C. | With a dry paint brush |
| D. | By dipping |
| 33. | Which of the following is not a form in which penetrant developer is commonly available? |
| A. | Dry developer |
| B. | Non Aqueous developer |
| C. | Wet developer |
| D. | High viscosity developer (answer) |
| 34. | Which of the following discontinuities could be classified as a service induced discontinuity? |
| A. | Fatigue crack (answer) |
| B. | Porosity |
| C. | Machine tear |
| D. | Lap |
| 35. | Which of the following physical properties, more than any other, determines what make sa material a good penetrant? |
| A. | Viscosity |
| B. | Surface tension (answer) |
| C. | Wetting ability |
| D. | No one single property determines if a material will or will not be a good penetrant |
| 36. | Which of the following contaminants could affect the sensitivity of a penetrant? |
| A. | Acid |
| B. | Water |
| C. | Salts |
| D. | All of the above (answer) |
| 37. | Which of the test part characteristics listed below are normally considered before the specific liquid penetrant test method is selected? |
| A. | The kind and size of discontinuities most likely to occur |
| B. | The intended application for the part |
| C. | The surface finish of the part |
| D. | All of the above (answer) |
| 38. | Which of the following is a purpose of the drying process used in penetrant testing? |
| A. | The drying process is used to assure that all excess penetrant will |
| evaporate. | |
| B. | The drying process assures the uniform drying of dry developer |
| applied over a wet emulsifier | |
| C. | The drying process reduces penetration time |
| D. | After the application of a wet developer , the drying time aids in securing a uniform developer coating (answer) |
| 39. | The penetrant indications of a forging lap will normally be : |
| A. | A round or nearly round indication |
| B. | A cluster of indications |
| C. | A continuous line (answer) |
| D. | A dotted line |
| 40. | An important difference between non water-washable penetrants and water-washable penetrants is that: |
| A. | Water-washable penetrants contain an emulsifier, while non waterwashable penetrants do not (answer) |
| B. | The viscosity of the two penetrants is different |
| C. | The color of the two penetrants is different |
| D. | Non water-washable penetrants are more easily removed than are |
| water washable penetrants. | |
| 41. | Which of the following is an advantage of solvent wipe methods over water-wasing? |
| A. | No special lighting is necessary during inspection |
| B. | They provide a quicker penetration of small openings |
| C. | Small indications are more easily seen |
| D. | They can easily be carried out in the field and remote areas (answer) |
| 42. | Which of the following is a discontinuitity that might be found in rolled bar stock? |
| A. | Blow holes |
| B. | Shrinkage laps (answer) |
| C. | Cracks and seams |
| D. | Insufficient penetration |
| 43. | The part is an aluminum forging. desription-the indication is sharpe, half-moon shape, not deep, and is called a : |
| A. | Lap (answer) |
| B. | Center line porosity |
| C. | Heat treat crack |
| D. | False indication |
| 44. | Which of the following is a discontinuitiy that might be found in a forging? |
| A. | Shrinkage cracks |
| B. | Laps |
| C. | Cold shuts (answer) |
| D. | Insufficient penetration |
| 45. | Which of the following is a possible cause for false penetrant indications? |
| A. | Excessive washing |
| B. | Inadequate application of developer |
| C. | Penetrant or part to cold during penetration time |
| D. | Lint or dirt (answer) |
| 46. | Which of the following is the best reason why excessive drying of a part is not desired? |
| A. | The extra time required is wasted |
| B. | The developer may lose its blotting ability |
| C. | A reduction in resolution may result (answer) |
| D. | The excess developer may be difficult to remove |
| 47. | Flourescent materials used in flourescent penetrants respond most actively to radiant energy, of a wave length of approximately: |
| A. | 7,000 Angstroms |
| B. | 250 KV |
| C. | 3,650 Angstroms (answer) |
| D. | 100 foot candles |
| 48. | The emulsifier is used: |
| A. | To wash the penetrant out of discontinuities |
| B. | As a aid in washing off the surface of parts when using either the water or oil soluble penetrants (answer) |
| C. | To emulsify the oil-soluble penetrant, thereby making it water washable |
| D. | To preclean parts before applying penetrant |
| 49. | The prime purpose of the blacklight for fluorescent penetrant inspection is: |
| A. | To magnify indications |
| B. | To make the indications visible (answer) |
| C. | To develop indications |
| D. | To speed up inspections |
| 50. | Water-washable liquid penetrants differ from post-emulsification penetrants in that water-washable penetrants: |
| A. | Can only be used on aluminum test specimens |
| B. | Need not be removed from the surfaces prior to development |
| C. | Have a soapy base |
| D. | Do not need the application of an emulsifier before rinsing (answer) |
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