30 Question PT quiz

1. The part is an aluminium casting. Description - the casting has a very complex design. In one section there is a flat area having a thickness of 3 mm (1/8). In the centre of this area is a round section, 50mm (2) thick and 25mm (1) in diameter. There are linear indications about one-half the distance around the base where it joins into the thin section. The indication is termed:

2. One of the differences between the hydrophffic and lipophilic post-emulsifiable penetrant systems is:

3. A part to be penetrant tested has just been removed from a vapour degreaser. What is the next step in processing?

4. Rejection or acceptance of parts should be based on which of the following, in absence of written acceptance criteria?

5. The sulphur found in penetrant materials are detrimental to:

6. Which of the following is TRUE concerning vapour degreasing prior to penetrant inspection?

7. A part being processed through a fluorescent water-washable penetrant system was inadvertently left to drain overnight after the application of penetraut. What action should be taken?

8. Which of the following is an advantage of fluorescent penetrants over visible type penetrants?

9. The most difficult developers to remove are the

10. Which system would provide maximum sensitivity for detection of fatigue cracks in an aircraft wheel?

11. A fluorescent water-washable test system uses spray application of penetrant and a storm cabinet (cloud chamber) for application of dry developer. At what locations should black light be available?

12. How is the degree of washing assessed when removing fluorescent penetrant:

13. The emulsifier in the post-emulsifiable penetrant method:

14. Penetrant dwell time is dependant on:

15. A commonly-used method of checking the overall performance of a penetrant system is:

16. Different types of discontinuities in various materials require different penetration limes. In general, fine, tight cracks require:

17. Emulsifier time:

18. The tendency of a liquid penetrant to enter a discontinuity is primarily related to:

19. The tendency of a liquid penetrant to enter a discontinuity is primarily related to:

20. Which of the following penetrant inspection processes is generally agreed to be the most sensitive and reliable?

21. When using a non-aqueous wet developer with a visible (red dye) penetrant, the developer coating for the maximum available sensitivity should be:

22. The excess penetrant removal technique that removes the most penetrant from discontinuities is:

23. A crack type discontinuity will generally appear as:

24. Some alloys are susceptible to corrosion or embrittlement due to the chemical action between the alloy and penetrant. This problem can be avoided after inspection by:

25. Which of the statements below best states the danger of using sandblasting for cleaning surfaces to be penetrant tested?

26. Aluminium alloy test specimens that have been tested by the liquid penetrant method should be thoroughly cleaned after testing because:

27. Which of the following contaminants could affect the sensitivity of a penetrant?

28. Which of the following methods for applying non-aqueous developer is normally considered most effective?

29. A penetrant indication, suspected of resulting from a small crack, is found in a titanium compressor blade. Which of the following NDT methods would most reliably confirm that a crack is present?

30. Which of the following is the most cost effective method of application of penetrant when fine fatigue cracks are to be detected?

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