PT - MC Flashcards
Which of the following conditions will affect the rate and extend a liquid penetrant will enter cracks fissures and other small openings?
a.) The hardness of the specimen being tested.
b.) The surface conditions of the specimen being tested.
c.) The colour of the penetrant.
d.) The conductivity of the specimen being tested.
b.) The surface conditions of the specimen being tested.
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 specimen of the part with compressed air.
d.) Wiping and cautiously cleaning the test specimen with a cleaner damped cloth.
d.) Wiping and cautiously cleaning the test specimen with a cleaner damped cloth.
Which of the following is a commonly used classification for penetrant?
a.) Post – emulsifiable penetrant.
b.) Non – ferrous penetrant.
c.) Chemical etch penetrant.
d.) Non – aqueous penetrant.
a.) Post – emulsifiable penetrant.
Which of the following parts could not be tested by the liquid penetrant method?
a.) An iron casting.
b.) An aluminium forging.
c.) A part made from a porous material.
d.) A part made from a non – porous material.
c.) A part made from a porous material.
Which of the following discontinuities can be found by the Penetrant Test method?
a.) A surface crack.
b.) A subsurface crack.
c.) An internal inclusion.
d.) None of the above.
a.) A surface crack.
Visible Penetrant may be applied by?
a.) Brushing.
b.) Spraying.
c.) Dipping.
d.) All of the above.
a.) Brushing.
b.) Spraying.
c.) Dipping.
d.) All of the above.
When conducting a water – washable liquid test, the wet developer is applied:
a.) Immediately after the penetrant has been applied.
b.) Immediately before the penetrant is applied.
c.) After removal of the penetrant.
d.) After removal of the emulsifier.
c.) After removal of the penetrant.
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.
The term used to define the period of time in which the test part is covered with penetrant is?
a.) Waiting time.
b.) Soak time (Drain Time)
c.) Penetration Time (Dwell Time)
d.) Bleed – In Time
c.) Penetration Time (Dwell Time)
Which of the following in not a characteristic that applies to Liquid Penetrant Testing?
a.) This method can accurately measure the depth of a crack of discontinuity.
b.) This method can be used for on-site testing of large parts.
c.) This method can be used to find shallow surface discontinuities.
d.) This method can be made more or less sensitive by using different penetrant materials.
a.) This method can accurately measure the depth of a crack of discontinuity.
The term used to define the tendency of certain liquids to penetrate into small openings such as cracks or fissures is:
a.) Saturation.
b.) Capillary action.
c.) Blotting.
d.) Wetting agent.
b.) Capillary action.
Which of the following materials cannot be tested by the usual liquid penetrant tests?
a.) Unglazed porous ceramic.
b.) Titanium.
c.) High alloy steels
d.) Aluminium
a.) Unglazed porous ceramic.
Which of the following statements concerning liquid penetrant testing is correct?
a.) Fluorescent penetrant will produce red against white discontinuity indications.
b.) Non-fluorescent penetrant require the use of black light.
c.) Fluorescent indications will be seen when exposed to black light.
d.) Non-fluorescent discontinuities glow in the dark for easy viewing and interpretation.
c.) Fluorescent indications will be seen when exposed to black light.
When conducting a penetrant test, which of the following precautions is not applicable?
a.) Keep the work are clean.
b.) Wash any penetrant from skin with soap and water as soon as possible.
c.) Keep penetrant of clothes
d.) Wash any excess penetrant from skin using gasoline.
d.) Wash any excess penetrant from skin using gasoline.
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.
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.
liquid penetrant testing is a test which can be used for:
a.) Locating and evaluating all types of discontinuities in a test specimen.
b.) Locating and determining the length, width and depth of discontinuities in a test specimen..
c.) Determining the tensile strength of a test specimen.
d.) Locating discontinuities open to the surface.
d.) Locating discontinuities open to the surface.
Generally, the method used to remove excess visible dye penetrant from a test specimen is primarily determined by the:
a.) Surface roughness of the specimen.
b.) Type of material being tested.
c.) Length of penetration time.
d.) None of the above.
a.) Surface roughness of the specimen.
If a part to be penetrant tested is first heated to a high temperature:
a.) The penetrant may become viscous.
b.) The penetrant may “flash” or ignite.
c.) The penetrant my lose some of its colour brilliance.
d.) The penetrant will show increased sensitivity.
b.) The penetrant may “flash” or ignite.
Which of the following statements do not apply to developers used during penetrant testing?
a) Developers are normally highly fluorescent.
b) Developers often furnish a contrasting background during inspection.
c) Developers absorb or blot the penetrant that remains in discontinuities after the rinse operation has been completed.
d) Developers may be either wet or dry.
a) Developers are normally highly fluorescent.
Which of the following can be removed from the surface at a test specimen by vapour decreasing?
a.) Oil.
b.) Paint.
c.) Phosphate coatings.
d.) None of the above.
a.) Oil.
Penetrant is applied to a part by dipping. The part is then placed on a rack while the penetrant seeps into discontinuities. If the penetrant time is too long, it wil be difficult to rinse the penetrant from the part. If this happens, the normal rinsing properties can by restored by?
a.) Chilling the part to a temperature of 40 degrees F.
b.) Heating the part to a temperature of 130 degrees F.
c.) Re-dipping the part.
d.) Applying a wet developer before attempting to rinse the part.
c.) Re-dipping the part.
Which of the following Penetrants can be used when inspection must take place under ordinary lighting conditions?
a.) Visible Dye Penetrant.
b.) Water washable fluorescent penetrant.
c.) Post-emulsification fluorescent penetrant.
d.) Any of the above.
a.) Visible Dye Penetrant.
A good penetrant must do all of the following except?
a.) Be able to readily penetrate very fine openings.
b.) Evaporate very rapidly.
c.) Be able to remain in relatively coarse openings.
d.) Be easily removed from the surface after testing.
b.) Evaporate very rapidly.
Colour-contrast Penetrants are commercially available in which of the following variations?
a.) Normal solvent clean types.
b.) Water-wash types.
c.) Post-emulsification types.
d.) All of the above.
A.) Normal solvent clean types.
b.) Water-wash types.
c.) Post-emulsification types.
d.) All of the above.
Which of the following penetrant systems is generally considered least sensitive?
a.) Water-washable – visible Dye.
b.) Solvent removable – visible Dye.
c.) Water-washable – fluorescent Dye.
d.) Post-emulsification – visible Dye.
a.) Water-washable – visible Dye.
In penetrant examinations, the phase of the process requiring the greatest skill and most experience of the operator is?
a.) Pre-cleaning.
b.) Establishing the emulsification time.
c.) Interpretation of result.
d.) Penetrant removal.
c.) Interpretation of result.
