NDT PT 2 PART 2 Flashcards
- When performing a fluorescent penetrant examination, excess penetrant is normally removed …
a) By a hydrophilic scrubber
b) Under a black light
c) By solvent spray
d) By vapour degreasing
b) Under a black light
- A developer aids penetrant bleed out because of …
a) Adequate removal of the excess penetrant
b) Providing a contrasting background for visible dye indications
c) Reverse Capillary action
d) Proper emulsifier action
c) Reverse Capillary action
- During a visible contrast, solvent removable penetrant test, complete penetrant
removal is indicated by …
a) Absence of red indications on the test piece surface
b) Clean rinse water
c) Completion of the rinse cycle
d) Absence of red dye on the cleaning towels
d) Absence of red dye on the cleaning towels
- Which of the following is a function of a developer?
a) Providing a contrasting background for visible dye indications
b) Making the penetrant water washable
c) Penetrating into discontinuities open to the surface
d) Dissolve organic soils on the test piece surface
a) Providing a contrasting background for visible dye indications
- Which of the following is a function of a developer?
a) Providing a contrasting background for visible dye indications
b) Accentuates presence of discontinuities by causing a penetrant indication to spread out over a larger area
c) Provides capillary paths to aid the bleed out process
d) All of the above
d) All of the above
- Which of the following developers is applied before the drying operation?
a) Dry
b) Nonaqueous wet
c) Water based
d) None of the above
c) Water based
- Which of the following types of developer may be either in suspension or a
solution?
a) Dry
b) Nonaqueous wet
c) Water based
d) None of the above
c) Water based
- The temperature of water rinse used in the water washable penetrant process should be …
a) 60 to 110 degrees Celsius
b) 40 to 100 degrees Celsius
c) 16 to 43 degrees Celsius
d) 25 ± 5 degrees Celsius
c) 16 to 43 degrees Celsius
- The danger of over washing during a water washable penetrant test is that …
a) Excess penetrant will be removed from the test piece
b) Penetrant will be removed from discontinuities
c) The waste water will contain too high a concentration of penetrants
d) A protective oxide coating on the test piece will be removed
b) Penetrant will be removed from discontinuities
- Water based developers is applied …
a) Immediately before removal of excess penetrant
b) Immediately after removal of excess penetrant
c) After a drying period following removal of excess penetrant
d) For maximum sensitivity results
b) Immediately after removal of excess penetrant
- Non-aqueous wet developer is applied …
a) Immediately before removal of excess penetrant
b) Immediately after removal of excess penetrant
c) After removal of excess penetrant followed by a drying period
d) For maximum sensitivity results
b) Immediately after removal of excess penetrant
- Dry developer is applied …
a) Immediately before removal of excess penetrant
b) Immediately after removal of excess penetrant
c) After removal of excess penetrant followed by a drying period
d) For maximum sensitivity results
c) After removal of excess penetrant followed by a drying period
- Which of the following penetrant processes is best suited to high production of
many small parts?
a) Solvent removable
b) Water washable
c) Post emulsifiable
d) Fluorescent
b) Water washable
- Which of the following penetrant processes is best suited to detection of
shallow discontinuities?
a) Solvent removable
b) Water washable
c) Post emulsifiable
d) Fluorescent
c) Post emulsifiable
- Which of the following penetrant processes is best suited to detection of discontinuities in a test piece having threads and keyways?
a) Solvent removable
b) Water washable
c) Post emulsifiable
d) Fluorescent
b) Water washable
- Which of the following penetrant processes is the most sensitive to fine
discontinuities?a) Solvent removable
b) Water washable
c) Post emulsifiable
d) Fluorescent
d) Fluorescent
- Which of the following is a disadvantage of fluorescent penetrant processes?
a) Lower visibility of indications
b) Must be performed in a darkened area
c) Easily washed with water
d) High visibility of indications
b) Must be performed in a darkened area
- Which of the following penetrant processes is best suited to portable
application in the field?
a) Solvent removable
b) Water washable
c) Post emulsifiable
d) Fluorescent
a) Solvent removable
- The desired temperature range of a drying oven used at a penetrant station is …
a) 150 to 225 degrees Celsius
b) 60-80 degrees Celsius
c) 6 to 125 degrees Celsius
d) 70 to 340 degrees Celsius
b) 60-80 degrees Celsius
- Which of the following developers is applied by brush, spraying or dipping?
a) Nonaqueous wet
b) Water based wet
c) Dry
d) Dual sensitivity
E) None use brush?
None use brush?
- Which of the following developers is applied by spray only?
a) Non-aqueous wet
b) Water based wet
c) Dry
d) Dual sensitivity
a) Non-aqueous wet
- Which of the following is the minimum time considered necessary for dark adaption of the eyes prior to evaluating the results of a fluorescent penetrant test?
a) 1 minute
b) 2 minutes
c) 5 minutes
d) 10 minutes
c) 5 minutes
- Which of the following developers may be applied by immersion or flow on
only?
a) Nonaqueous wet
b) Water based wet
c) Dry
d) Dual sensitivity
b) Water based wet
- Which of the following is the likely result of looking directly into a black light?
a) Burning of the retina of the eye
b) Temporary inflammation of the cornea
c) Long term tendency toward formation of cataracts
d) Fluorescence of the fluid in the eye
d) Fluorescence of the fluid in the eye
- Which type of penetrant process would be best suited to the detection of wide, shallow discontinuities?
a) Solvent removable
b) Water washable
c) Post emulsifiable
d) Fluorescent
c) Post emulsifiable
- Which type of penetrant process affords most control of test sensitivity level?
a) Solvent removable
b) Water washable
c) Post emulsifiable
d) Fluorescent
c) Post emulsifiable
- Which of the following is the proper first step in removal of excess penetrant when using the solvent removable penetrant process?
a) Immerse the test piece in solvent
b) Spray the test piece with water
c) Wipe the test piece surface with clean, dry, lint free towels moistened with solvent
d) Wipe the test piece surface with clean, dry, lint free towels
c) Wipe the test piece surface with clean, dry, lint free towels moistened with solvenT
- Which type of penetrant process is least susceptible at over washing?
a) Solvent removable
b) Water washable
c) Post emulsifiable
d) Fluorescent
a) Solvent removable
- Which of the following is a disadvantage of the solvent removable penetrant process?
a) It is the least sensitive of the penetrant processes
b) It is not well suited for use on rough surfaces
c) It is highly portable
d) No water is required of its use
b) It is not well suited for use on rough surfaces
- Correct interpretation of penetrant test results requires …
a) Knowledge of materials manufacturing processes
b) An understanding of the type and appearance of likely discontinuities
c) An understanding of materials failure modes
d) All of the above
d) All of the above
- With a dry or nonaqueous wet developer, typical development times are …
a) 1 to 3 minutes
b) 15 to 20 minutes
c) 7 to 40 minutes
d) 30 minutes to 1 hour
b) 15 to 20 minutes
- The most common cause of false indications is …
a) Unacceptable discontinuities
b) Surface flaws
c) Inadequate washing with water washable and post emulsifiable penetrants
d) Shape of part
c) Inadequate washing with water washable and post emulsifiable penetrants
- Which of the following is a source of non-relevant indications?
a) A keyway
b) A riveted joint
c) Bolt thread
d) All of the above
d) All of the above
- Which of the following types of indications has to be evaluated?
a) True indications
b) Non relevant indications
c) False indications
d) All of the above
a) True indications
- A jagged, continuous line indication would probably be a …
a) Cold shut
b) Crack
c) Forging lap
d) Gas hole
b) Crack
- An intermittent line indication might be caused by …
a) An internal forging burst
b) Interpass lack of fusion
c) A crack which has been partially ground or sandblasted
d) Porosity
c) A crack which has been partially ground or sandblasted
- Round indications would most likely be caused by …
a) A crack
b) A forging burst
c) A cold shut
d) Porosity
d) Porosity
- Aluminium comparator blocks with quench cracks are used to …
a) Compare the performance of penetrants
b) Compare to production test results to evaluate crack severity
c) Develop heat treatment procedures
d) Demonstrate penetrant test sensitivity
a) Compare the performance of penetrants
- Which of the following is a limitation of the penetrant testing process?
a) It can only be used on non-magnetic materials
b) It cannot be used on materials which have a porous surface
c) It can be used on either magnetic or non-magnetic materials
d) Demonstrate penetrant test sensitivity
b) It cannot be used on materials which have a porous surface
- In stationary penetrant test equipment for the water washable fluorescent method, where will black lights be located?
a) Drain and rinse stations
b) Emulsifier and inspection stations
c) Rinse and inspection stations
d) Drain, emulsifier and rinse stations
c) Rinse and inspection stations
- Penetrants which are designed for use as either visible or fluorescent are called …
a) Visible/fluorescent penetrants
b) Dual sensitivity penetrants
c) Multi-mode penetrants
d) Dual mode penetrants
BS EN ISO 3452-1 – Dual purpose
b) Dual sensitivity penetrants
BS EN ISO 3452-1 – Dual purpose
- Which penetrants processes may use the same penetrant?
a) Water washable and post emulsifiable
b) Water washable and solvent removable
c) Solvent removable and post emulsifiable
d) No two penetrant processes use the same penetrant
d) No two penetrant processes use the same penetrant
- Which of the following is a basis for classifying penetrant processes?
a) Method of removal from the test piece
b) Type developer used
c) Sensitivity
d) Colour or dye used
a) Method of removal from the test piece
- Which of the following is not a consideration in selecting the penetrant process to be used?
a) Colour of penetrant dye
b) Sensitivity required
c) Number of objects to be tested
d) Surface conditions on test piece
a) Colour of penetrant dye
- Which of the following might be used to remove rust and scale prior to penetrant testing?
a) Ultrasonic testing
b) Pickling
c) Vapour degreasing
d) Steam cleaning.
a) Ultrasonic testing
- A generally accepted method for removing excess non water washable penetrant is …
a) Repeatedly dipping the test specimen in a cleaner
b) Soaking the test specimen in hot detergent water
c) Blowing the excess penetrant off the surface of the part with low compressed water
d) Wiping and carefully cleaning the test specimen with a cloth dampened with
cleaner
d) Wiping and carefully cleaning the test specimen with a cloth dampened with
cleaner
- The first step in conducting a liquid penetrant test on a surface that has been painted is to …
a carefully apply the penetrant over the surface
b completely remove the paint
c thoroughly wash the surface with a detergent
d wire brush to roughen the smooth surface coating of paint
b completely remove the paint
- Usually the most desirable method of removing excess water washable penetrant after the dwell time is by …
a a low pressure, coarse water spray
b water and brush
c a solid stream of water
d water and clean rags
a a low pressure, coarse water spray
- Which of the statements below best states the danger of sandblasting (without subsequent chemical etching) for cleaning surfaces to be penetrant tested?
a the discontinuities may be peened over and closed
b oil contaminants might be sealed in the discontinuities
c the sand used in the sandblasting operation may be forced into the discontinuity
d the sandblasting operation may introduce discontinuities
e All of the above
a the discontinuities may be peened over and closed
- When removing excess penetrant from the surface of a test specimen …
a the penetrant removal operation must not remove the penetrant from discontinuities
b sufficient excess penetrant must be removed to eliminate an interfering background
c the use of a solvent dampened cloth is a common method of penetrant removal
d all of the above
d all of the above
