Methylene chloride, isopropyl, alcohol, naptha and mineral spirits are examples of:

Related MCQs

• Lithium sulphate, barium titanate and lead metaniobate are examples of:
• A group of indications, some sharp and some broad and fuzzy, were found on an area of a small forging. Demagnetization and re-inspection eliminated these indications. What was the probable cause?
• Which of the following is false concerning a magnetic field in and around a hollow conductor as compared to that of a solid conductor of the same outside diameter when both are of the same magnetic material, and when the applied current is the same?
• According to ASTME 709-95 and API, in order to eliminate all contaminants, an appropriate cleaning shall be performed on all the surfaces to be examined and on a minimum of adjacent material:
• Radiographic equivalence factors for Inconel and 304 stainless steel are 1.4 and 1.0 respectively. What is the approximate equivalent thickness of Inconel requiring the same exposure as 1.27 cm (½ inch) thickness of 304 stainless steel?
• The approximate radiographic equivalence factors for steel and copper at 220 kV are 1.0 and 1.4 respectively. If it is desirable to radiograph a 1.27 cm (0.5 inch) piece of copper, what thickness of steel would require about the same exposure characteristics?
• Which of the following chemical elements are normally held to a minimum in liquid penetrant materials, when testing stainless steel and titanium?
• What is the preferred pre-cleaning process for removal of oil and grease :
• Low sulphur and chlorine penetrant materials would be used for testing:
• Which penetrant process is best suited to the detection of discontinuities in a test piece having threads and keyways?