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