LPI Level 1 Practice Test
Which one of the following conditions will affect the rate and the extent a liquid penetrant will
enter cracks, fissures, and other small openings? - answer-the surface condition of the
specimen being tested
Which of the following is a commonly used classification for penetrant? - answer-post-
emulsifiable penetrant
A generally accepted method for removing excess nonwater-washable penetrant is - answer-
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 - answer-a part
made from a porous plastic material
Which of the following discontinuities can be found by the penetrant test method? - answer-a
surface crack
Which of the following is generally the more acceptable method for cleaning parts prior to
penetrant testing? - answer-vapor degreasing
All of the following methods are commonly used to clean parts prior to penetrant testing
except - answer-power wire brushing
Cutting oils may be effectively removed from parts before penetrant testing by - answer-vapor
degreasing
The most common type of contaminant in fluorescent penetrant fluid is - answer-water
Black light, with a proper functioning filter in place, used for fluorescent penetrant inspection
can cause permanent damage to - answer-none of the above
All of the following basic inspection principles apply to the penetrant methods except - answer-
indications glow when illuminated with a black light
Subsurface discontinuities can be best detected by - answer-none of the above
Visible penetrant may be applied by - answer-brushing, spraying, and dipping
The first step in conducting a liquid penetrant test on a surface that has been painted is to -
answer-completely remove the paint
, When using a post-emulsification penetrant, it is necessary to apply the emulsifier: - answer-
after the dwell time has elapsed
When conducting a water-washable liquid penetrant test, the wet developer is applied -
answer-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 - answer-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 - answer-ultraviolet light
The term used to define the period of time in which the test part is covered with penetrant is -
answer-penetration time (dwell time)
Usually, the most desirable method of removing excess water-washable penetrant after the
dwell time is by using - answer-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 - answer-spraying
Which of the following characteristics does not apply to liquid penetrant testing - answer-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? - answer-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 - answer-
scan the surface with a black light
Which of the following surface conditions could have a detrimental effect on a liquid penetrant
test? - answer-a wet surface, a rough weld, and an oily surface
Liquid penetrant testing is capable of detecting - answer-discontinuities open to the surface
Black light equipment is required when penetrant testing by - answer-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 - answer-capillary action
Which one of the following conditions will affect the rate and the extent a liquid penetrant will
enter cracks, fissures, and other small openings? - answer-the surface condition of the
specimen being tested
Which of the following is a commonly used classification for penetrant? - answer-post-
emulsifiable penetrant
A generally accepted method for removing excess nonwater-washable penetrant is - answer-
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 - answer-a part
made from a porous plastic material
Which of the following discontinuities can be found by the penetrant test method? - answer-a
surface crack
Which of the following is generally the more acceptable method for cleaning parts prior to
penetrant testing? - answer-vapor degreasing
All of the following methods are commonly used to clean parts prior to penetrant testing
except - answer-power wire brushing
Cutting oils may be effectively removed from parts before penetrant testing by - answer-vapor
degreasing
The most common type of contaminant in fluorescent penetrant fluid is - answer-water
Black light, with a proper functioning filter in place, used for fluorescent penetrant inspection
can cause permanent damage to - answer-none of the above
All of the following basic inspection principles apply to the penetrant methods except - answer-
indications glow when illuminated with a black light
Subsurface discontinuities can be best detected by - answer-none of the above
Visible penetrant may be applied by - answer-brushing, spraying, and dipping
The first step in conducting a liquid penetrant test on a surface that has been painted is to -
answer-completely remove the paint
, When using a post-emulsification penetrant, it is necessary to apply the emulsifier: - answer-
after the dwell time has elapsed
When conducting a water-washable liquid penetrant test, the wet developer is applied -
answer-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 - answer-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 - answer-ultraviolet light
The term used to define the period of time in which the test part is covered with penetrant is -
answer-penetration time (dwell time)
Usually, the most desirable method of removing excess water-washable penetrant after the
dwell time is by using - answer-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 - answer-spraying
Which of the following characteristics does not apply to liquid penetrant testing - answer-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? - answer-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 - answer-
scan the surface with a black light
Which of the following surface conditions could have a detrimental effect on a liquid penetrant
test? - answer-a wet surface, a rough weld, and an oily surface
Liquid penetrant testing is capable of detecting - answer-discontinuities open to the surface
Black light equipment is required when penetrant testing by - answer-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 - answer-capillary action
