Exam (elaborations)
CWB Level 2 Mod 17 Surface Inspection Exam Questions and Answers
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CWB Level 2 Mod 17 Surface Inspection
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CWB Level 2 Mod 17 Surface InspectionExercise Question - Section 2.1-2.4 1. The property of liquids that makes them try to reduce their surface area is known as:
a) capillary action
b) surface tension
c) viscosity - Answer- b) surface tension
Exercise Question - Section 2.1-2.4 2. True or False The ability of a liquid to wet a solid surface can be measured in terms of the contact angle - Answer- True
Exercise Question - Section 2.1-2.4 3. The phenomenon by which water rises up a narrow tube or by which a liquid can penetrate a crack is known as:
a) capillary action
b) surface tension
c) viscosity - Answer- a) capillary action
Exercise Question - Section 2.1-2.4 4. How must a fluorescent dye be viewed? - Answer- Under black light
Exercise Question - Section 2.1-2.4 5. Which of the following penetrants require treatment with a separate agent before the excess can be removed? a) post emulsifiable b) water washable c) post remover
d) solvent removable - Answer- a) post emulsifiable &
c) post remover
Exercise Question - Section 2.1-2.4 6. What type of developer is normally used with the solvent-removal process to spot check welds? - Answer- Non aqueous
Exercise Question - Section 2.5
1. True or False The fluorescent post emulsified penetrant process is often recommended for high sensitivity applications such as detection of fatigue cracks - Answer- True
Exercise Question - Section 2.5
2. Does the liquid penetrant process work on stainless and aluminum? - Answer- Yes
Exercise Question - Section 2.5
3. Give one way in which a change to a liquid penetrant procedure could be qualified. - Answer- Using a Comparator block
Exercise Question - Section 2.5
True or False 4. When using liquid penetrant inspection, the surface must be ground smooth to remove all irregularities before applying the penetrant - Answer- False - Grinding can flow the surface and conceal defects
Exercise Question - Section 2.5
5. According to ASTM-E165 the surface temperature for liquid penetrant inspection should not be outside the range: a) 12 Celsius to 52 Celsius (60F-125F)
b) 21 Celsius to 24 Celsius (70-75 F)
c) -18 Celsius to 38 Celsius (0-100F) - Answer- a) 12 Celsius to 52 Celsius (60F-125F)
Exercise Question - Section 2.5
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