Liquid Penetrant Testing Exam UPDATED
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Angstrom unit - CORRECT ANSWER A unit of length which may be used to express
the wavelength of electromagnetic radiation, that is, light. One angstrom unit is equal to 0.1
nanometres.
Background - CORRECT ANSWER the surface of the test part against which the
indication is viewed. It may be the natural surface of the test part or the developer coating on
the surface.
Black light - CORRECT ANSWER electromagnetic radiation in the near-ultraviolet
range of wavelength.
Black light filter - CORRECT ANSWER A filter that transmits near-ultraviolet
radiation absorbing other wavelengths.
Bleedout - CORRECT ANSWER The action of an entrapped liquid penetrant in
surfacing from discontinuities to form indications.
Blotting - CORRECT ANSWER the action of the developer in soaking up the
penetrant from the discontinuity to accelerate bleedout.
Carrier - CORRECT ANSWER A liquid, either aqueous or nonaqueous, in which
liquid penetrant testing materials are dissolved or suspended.
Class - CORRECT ANSWER The descriptive term for categorizing solvent removers
with similar characteristics.
Clean - CORRECT ANSWER free of contaminants.
, Contaminate - CORRECT ANSWER any foreign substance present on the test surface
or in the inspection materials which will adversely affect the performance of liquid penetrant
materials.
Contrast - CORRECT ANSWER The difference in visibility (brightness or coloration)
between an indication and the background.
Detergent remover - CORRECT ANSWER A penetrant remover that is a solution of a
detergent in water.
Develope - CORRECT ANSWER A material that is applied to the test surface to
accelerate bleedout and to enhance the contrast of indications
Developer, aqueous - CORRECT ANSWER A suspension of developer particles in
water.
Developer, dry powder - CORRECT ANSWER A fine free-flowing powder used as
supplied.
Developer, liquid film - CORRECT ANSWER A suspension of developer particles in a
vehicle which leaves a resin/polymer film on the test surface after drying.
Developer, non-aqueous - CORRECT ANSWER Developer particles suspended in a
nonaqueous vehicle prior to application.
Developer, soluble - CORRECT ANSWER A developer completely soluble in its
carrier, not a suspension of powder in a liquid, whic h dries to an absorptive coating.
Developing time - CORRECT ANSWER the elapsed time between the application of
the developer and examination of the part.
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Angstrom unit - CORRECT ANSWER A unit of length which may be used to express
the wavelength of electromagnetic radiation, that is, light. One angstrom unit is equal to 0.1
nanometres.
Background - CORRECT ANSWER the surface of the test part against which the
indication is viewed. It may be the natural surface of the test part or the developer coating on
the surface.
Black light - CORRECT ANSWER electromagnetic radiation in the near-ultraviolet
range of wavelength.
Black light filter - CORRECT ANSWER A filter that transmits near-ultraviolet
radiation absorbing other wavelengths.
Bleedout - CORRECT ANSWER The action of an entrapped liquid penetrant in
surfacing from discontinuities to form indications.
Blotting - CORRECT ANSWER the action of the developer in soaking up the
penetrant from the discontinuity to accelerate bleedout.
Carrier - CORRECT ANSWER A liquid, either aqueous or nonaqueous, in which
liquid penetrant testing materials are dissolved or suspended.
Class - CORRECT ANSWER The descriptive term for categorizing solvent removers
with similar characteristics.
Clean - CORRECT ANSWER free of contaminants.
, Contaminate - CORRECT ANSWER any foreign substance present on the test surface
or in the inspection materials which will adversely affect the performance of liquid penetrant
materials.
Contrast - CORRECT ANSWER The difference in visibility (brightness or coloration)
between an indication and the background.
Detergent remover - CORRECT ANSWER A penetrant remover that is a solution of a
detergent in water.
Develope - CORRECT ANSWER A material that is applied to the test surface to
accelerate bleedout and to enhance the contrast of indications
Developer, aqueous - CORRECT ANSWER A suspension of developer particles in
water.
Developer, dry powder - CORRECT ANSWER A fine free-flowing powder used as
supplied.
Developer, liquid film - CORRECT ANSWER A suspension of developer particles in a
vehicle which leaves a resin/polymer film on the test surface after drying.
Developer, non-aqueous - CORRECT ANSWER Developer particles suspended in a
nonaqueous vehicle prior to application.
Developer, soluble - CORRECT ANSWER A developer completely soluble in its
carrier, not a suspension of powder in a liquid, whic h dries to an absorptive coating.
Developing time - CORRECT ANSWER the elapsed time between the application of
the developer and examination of the part.
