ASNT II Flashcards
The speed with which a penetrant penetrates a surface flaw is influenced to the greatest extent by which of the following properties?
Viscosity
Which of the statements below concerning the operation of the black light bulbs of the mercury arc type is NOT true?
Line voltage variations above 120 volts will have little or no effect on the bulb.
Which of the items listed below is NOT an advantage of the liquid penetrant test method?
The method can find all types of discontinuities.
Which of the statements below apply to the liquid penetrant method of testing?
The penetrant test method is more reliable than radiographic testing when attempting to detect minute surface discontinuities.
Which of the following types of discontinuities will NOT be detected by the liquid penetrant test method?
Internal forging bursts
Which of the following discontinuities could be classified as a primary processing discontinuity often found in cast material.
Porosity
Which of the following discontinuities could be classified as a finishing processing discontinuity?
Heat-treat crack
Which of the following discontinuities could be classified as a service induced discontinuity?
Fatigue crack
Which of the test part characteristics listed below are normally considered before the specific liquid penetrant test method is selected?
|A. The kind and size of discontinuities most likely to occur.
|B. The intended application for the part.
|C. The surface finish of the part.
|D. All of the above.
\D
Aluminum alloy test specimens that have been tested by the liquid penetrant method should be thoroughly cleaned after testing because:
the alkaline content of wet developers and most emulsifiers
Which of the following are typical of foreign matter which might block the openings of discontinuities if the surface of a test specimen is NOT properly cleaned?
\D |A. Paint |B. Scale |C. Core and mold material |D. All of the above
Which of the following is NOT recommended method of removing grease from a surface of a part to be penetrant tested?
Hot water rinse
The penetrant indication for a cold shut on the surface of a casting will be:
a dotted or smooth continuous line.
The penetrant indication of a forging lap will normally be:
a continuous line
When conducting a penetrant test, spherical indications on the surface of a part could be indicative of
porosity
Which of the following is NOT a form in which penetrant
developer is commonly available?
High viscosity developer
Which of the following is a possible cause for false penetrant indications?
Lint or dirt
Penetrant residues may become entrapped under spines, fasteners, rivets, etc. Which of the following is the most likely reaction caused by such a residue?
Corrosion caused by the moisture attracted by such residues
Developer assists in the detection of penetrants retained in discontinuities by aiding the
bleed-out process
Developer assists in the detection of the visible dye penetrant test indications by:
providing a contrasting background.
When using post-emulsification penetrants, difficulties incurred during the washing operation can be overcome by:
completely reprocessing the part from surface preparation on
Which of the following methods for applying non-aqueous developer is normally considered most effective?
Spraying.
Of the methods listed below, the most effective means of precleaning a test item prior to a penetrant test is
vapor degreasing.
Fluorescent materials used in fluorescent penetrants respond most actively to radiant energy, of a wavelength of approximately:
3,650 Angstroms.
In liquid penetrant testing when using solvent removable visible dye penetrant, several methods exist for excess penetrant removal from a surface part. Which of the methods is generally more suitable for giving accurate test results?
Wiping with dry paper wipes, then wiping with a solvent
Prior to penetrant testing of a previously machined soft metal part, which of the cleaning methods listed below would best remove any smeared metal that could mask discontinuities?
Etching
Which of the following is a purpose of the drying process used in penetrant testing?
After the application of a wet developer, the drying process aids in securing a uniform developer coating.
Which of the following is the best reason why excessive drying of a part is NOT desired?
A reduction in resolution may result.
Which of the following is the best reason why the application of emulsifier by a brush is NOT recommended?
The brushing action mixes the emulsifier with the penetrant prematurely and irregularly, making accurate control of the emulsification time impossible
Developing time depends on the:
type of developer used and type of discontinuity to be detected.
When using a fluorescent, post-emulsifiable penetrant, the length of time the emulsifier is allowed to remain on the part is critical when detecting shallow scratch-like discontinuities. The best length of time should be:
determined by experimentation.
Which of the following statements concerning contaminating materials on the surface of a part to be penetrant tested is NOT true?
The contaminant may retain the penetrant and thus increase the sensitivity of the inspection.
Water-washable liquid penetrants differ from post-emulsification penetrants in that water-washable penetrants:
do not need the application of an emulsifier before rinsing.
The function of the emulsifier in the post-emulsification
penetrant method is to
react with the surface penetrant to make the penetrant water-washable.
When penetrant testing for shallow discontinuities using a post-emulsification penetrant, the emulsification times should be long enough to:
mix the emulsifier with the excess surface penetrant only
Which of the following is NOT good practice when penetrant testing?
Applying emulsifier with a brush
An important difference between non-water-washable penetrants and water-washable penetrants is that
water-washable penetrants contain an emulsifier, while non-water washable penetrants do not.
Which of the following characteristics are normally considered when selecting the type of penetrant to be used in a penetrant test?
\D |A. Removal characteristics of the penetrant. |B. The flash point of the penetrant. |C. The cost of the penetrant. |D. All of the above.
When penetrant testing Titanium alloys, the materials used in the penetrant system should NOT contain any constituent quantities of:
halogenated solvents.
Which of the following is a discontinuity which might be found in sand castings:
Shrinkage
Which of the following discontinuities might be found in a welded fabrication?
Lack of fusion
Which of the following discontinuities might be found in rolled bar stock?
Laps
Which of the following discontinuities might be found in rolled plate?
Laminations
Which of the following contaminants could affect the sensitivity of a penetrant.
\D |A. Acid |B. Water |C. Salts |D. All of the above.
Which of the following is a discontinuity that might be found in a forging?
Laps
