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LPI LEVEL 1 PRACTICE TEST QUESTIONS AND ANSWERS
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LPI LEVEL 1 PRACTICE TEST QUESTIONS AND ANSWERS
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LPI LEVEL 1PRACTICE TEST
QUESTIONS AND
ANSWERS
Which 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
The term used to describe the action of a particular developer in soaking up the
penetrant in a discontinuity, so as to cause the maximum bleed-out of the liquid
penetrant for increased contrast and sensitivity, is known as - Answers-blotting
Using a black light lamp with a cracked filter or without the filter in place can cause
damage to human eyes because the lamp emits - Answers-ultraviolet light
The term used to define the period of time in which the test part is covered with
penetrant is - Answers-penetration time (dwell time)
Usually, the most desirable method of removing excess water-washable penetrant after
the dwell time is by using - Answers-a low pressure coarse water spray
When conducting a liquid penetrant test using a post-emulsifiable visible dye penetrant,
the generally accepted method for applying the wet developer is by - Answers-spraying
Which of the following characteristics does not apply to liquid penetrant testing -
Answers-this method can accurately measure the depth of a crack or discontinuity
Which of the following discontinuities is most likely to be missed due to improper rinse
techniques? - Answers-shallow and broad discontinuities
When conducting a fluorescent penetrant test, a commonly used technique for assuring
that the excess penetrant has been removed prior to the application of a developer is to
- Answers-scan the surface with a black light
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