2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!
LPI LEVEL 1 PRACTICE TEST QUESTIONS
AND ANSWERS 2024/2025
Which one of the following conditions will affect the rate and the extent a liquid penetrant will
enter cracks, fissures, and other small openings?
→ the surface condition of the specimen being tested
Which of the following is a commonly used classification for penetrant?
→ post-emulsifiable penetrant
A generally accepted method for removing excess nonwater-washable penetrant is
→ 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
→ a part made from a porous plastic material
Which of the following discontinuities can be found by the penetrant test method?
→ a surface crack
Which of the following is generally the more acceptable method for cleaning parts prior to
penetrant testing?
→ vapor degreasing
All of the following methods are commonly used to clean parts prior to penetrant testing
except
1|Page| GradeA+ | 2 0 0 2 5
,2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!
→ power wire brushing
Cutting oils may be effectively removed from parts before penetrant testing by
→ vapor degreasing
The most common type of contaminant in fluorescent penetrant fluid is
→ water
Black light, with a proper functioning filter in place, used for fluorescent penetrant inspection
can cause permanent damage to
→ none of the above
All of the following basic inspection principles apply to the penetrant methods except
→ indications glow when illuminated with a black light
Subsurface discontinuities can be best detected by
→ none of the above
Visible penetrant may be applied by
→ brushing, spraying, and dipping
The first step in conducting a liquid penetrant test on a surface that has been painted is to
→ completely remove the paint
When using a post-emulsification penetrant, it is necessary to apply the emulsifier:
1|Page| GradeA+ | 2 0 0 2 5
, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!
→ after the dwell time has elapsed
When conducting a water-washable liquid penetrant test, the wet developer is applied
→ 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
→ 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
→ ultraviolet light
The term used to define the period of time in which the test part is covered with penetrant is
→ penetration time (dwell time)
Usually, the most desirable method of removing excess water-washable penetrant after the
dwell time is by using
→ 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
→ spraying
Which of the following characteristics does not apply to liquid penetrant testing
1|Page| GradeA+ | 2 0 0 2 5
LPI LEVEL 1 PRACTICE TEST QUESTIONS
AND ANSWERS 2024/2025
Which one of the following conditions will affect the rate and the extent a liquid penetrant will
enter cracks, fissures, and other small openings?
→ the surface condition of the specimen being tested
Which of the following is a commonly used classification for penetrant?
→ post-emulsifiable penetrant
A generally accepted method for removing excess nonwater-washable penetrant is
→ 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
→ a part made from a porous plastic material
Which of the following discontinuities can be found by the penetrant test method?
→ a surface crack
Which of the following is generally the more acceptable method for cleaning parts prior to
penetrant testing?
→ vapor degreasing
All of the following methods are commonly used to clean parts prior to penetrant testing
except
1|Page| GradeA+ | 2 0 0 2 5
,2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!
→ power wire brushing
Cutting oils may be effectively removed from parts before penetrant testing by
→ vapor degreasing
The most common type of contaminant in fluorescent penetrant fluid is
→ water
Black light, with a proper functioning filter in place, used for fluorescent penetrant inspection
can cause permanent damage to
→ none of the above
All of the following basic inspection principles apply to the penetrant methods except
→ indications glow when illuminated with a black light
Subsurface discontinuities can be best detected by
→ none of the above
Visible penetrant may be applied by
→ brushing, spraying, and dipping
The first step in conducting a liquid penetrant test on a surface that has been painted is to
→ completely remove the paint
When using a post-emulsification penetrant, it is necessary to apply the emulsifier:
1|Page| GradeA+ | 2 0 0 2 5
, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!
→ after the dwell time has elapsed
When conducting a water-washable liquid penetrant test, the wet developer is applied
→ 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
→ 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
→ ultraviolet light
The term used to define the period of time in which the test part is covered with penetrant is
→ penetration time (dwell time)
Usually, the most desirable method of removing excess water-washable penetrant after the
dwell time is by using
→ 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
→ spraying
Which of the following characteristics does not apply to liquid penetrant testing
1|Page| GradeA+ | 2 0 0 2 5
