b. They are easily with water after proper emulsification dwell time c. They are easily removed from sand dwell time castings after proper emulsification d. They have higher tolerance to variations in the removal process when compared to water washable penetrants 37. When using the visible, solvent removable process.after the penetrant dwell time, excess penetrant is removed by: a. Spraying solvent on the part and then wiping with a clean, dry rag or paper towel b. Wiping off excess penetrant with a clean, dry rag or paper towel, moistening the part with solvent and rewiping the part c. Wiping off excess penetrant with a clean, dry rag or paper towel, moistening a clean cloth with solvent and rewiping the part d. Wiping off excess penetrant with a clean, dry rag or paper towel, then rewiping with a cloth soaked with solvent. 38. Open, shallow discontinuities are best detected by which penetrant testing method? a. Solvent removable b. Water washable c. Post emulsifiable d. None of the above 39. A relevant indication in a casting may be caused by: a. A burst b. A crater crack c. Laminations d. Porosity 40. Compared to a certified Level I inspector, a Level II inspector: a. Can process all forms of a product b. Is authorizec to approve all penetrant procedures c. Requires more formal training hour and work experience d. Can determine the acceptance criteria for a part