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LPI LEVEL 1 PRACTICE TEST
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LPI LEVEL 1 PRACTICE TEST
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LPI LEVEL 1 PRACTICE TESTWhich one of the following conditions will affect the rate and the extent a liquid
penetrant will enter cracks, fissures, and other small openings? - Answers -the surface
condition of the specimen being tested
Which of the following is a commonly used classification for penetrant? - Answers -post-
emulsifiable penetrant
A generally accepted method for removing excess nonwater-washable penetrant is -
Answers -wiping and cautiously cleaning the test specimen with a cleaner-dampened
cloth
All of the following parts can be tested by the liquid penetrant method except - Answers
-a part made from a porous plastic material
Which of the following discontinuities can be found by the penetrant test method? -
Answers -a surface crack
Which of the following is generally the more acceptable method for cleaning parts prior
to penetrant testing? - Answers -vapor degreasing
All of the following methods are commonly used to clean parts prior to penetrant testing
except - Answers -power wire brushing
Cutting oils may be effectively removed from parts before penetrant testing by -
Answers -vapor degreasing
The most common type of contaminant in fluorescent penetrant fluid is - Answers -water
Black light, with a proper functioning filter in place, used for fluorescent penetrant
inspection can cause permanent damage to - Answers -none of the above
All of the following basic inspection principles apply to the penetrant methods except -
Answers -indications glow when illuminated with a black light
Subsurface discontinuities can be best detected by - Answers -none of the above
Visible penetrant may be applied by - Answers -brushing, spraying, and dipping
The first step in conducting a liquid penetrant test on a surface that has been painted is
to - Answers -completely remove the paint
When using a post-emulsification penetrant, it is necessary to apply the emulsifier: -
Answers -after the dwell time has elapsed
, When conducting a water-washable liquid penetrant test, the wet developer is applied -
Answers -after the removal of the penetrant
Which of the following surface conditions could have a detrimental effect on a liquid
penetrant test? - Answers -a wet surface, a rough weld, and an oily surface
Liquid penetrant testing is capable of detecting - Answers -discontinuities open to the
surface
Black light equipment is required when penetrant testing by - Answers -the fluorescent
penetrant method
The term used to define the tendency of certain liquids to penetrate into small openings
such as cracks or fissures is - Answers -capillary action
Excess penetrant (all penetrant except that which is in discontinuities) is removed from
the specimen - Answers -after the required penetrant dwell time has elapsed
When using a post-emulsifiable penetrant, the emulsifier time should be - Answers -only
as long as necessary to remove the interfering background
when an inspector is working in a darkened area, he/she should become adjusted to the
dark before inspecting parts. The generally accepted time period for becoming
accustomed to the dark is - Answers -5 to 10 minutes
when applying penetrant by dipping, heating the penetrant prior to dipping - Answers -is
not generally recommended
A penetrant inspection cannot find - Answers -an internal cavity
All of the following materials can be tested by the usual liquid penetrant tests except -
Answers -unglazed porous ceramic
Liquid penetrant testing can be used to detect - Answers -discontinuities open to the
surface
Which of the following are commonly accepted methods for applying penetrant? -
Answers -dipping the part in penetrant (dipping), pouring the penetrant over the test
specimen (flowing), and spraying the penetrant on the test specimen (spraying)
A solvent used to clean the surface of a test specimen must possess all of the following
characteristics except that the - Answers -cleaner must not be flammable
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