Liquid Penetrant Testing PT Level III
Certification Questions with Answers Guide 2026
1. Chemical cleaners are often used for very dirty, greasy D
parts. If used, the surface should be subsequently
cleaned with:
(Answer with A, B, C, or D)
a. Acid type removal
b. Hot water
c. Solvent type paint remover
d. Hot tank alkaline cleaning
2. Generally, vapor degreasing is considered to be one A
of the best techniques for preparing a part for PT
because it is suitable for:
(Answer with A, B, C, or D)
a. Removal of organic contaminants
b. Removal of scale, rust, oxides, and corrosion
c. Use on chloride, sensitive metals
d. Removal of inorganic soils
3. When penetrant is applied to parts by dipping, the C
parts should be:
(Answer with A, B, C, or D)
a. Left in the tank during the entire dwell time
b. Set aside until the dwell time is up
c. Placed on a rack designed to return any excess
drainage to the dipping station
d. Placed in the alkaline solvent rinse tank immediate-
ly
4. With all other factors the same, when removing pene- High viscosity
trant from the surface by spray water wash, penetrant
in a crack would be harder to remove if it has which
viscosity?
, Liquid Penetrant Testing PT Level III
Certification Questions with Answers Guide 2026
a. Low viscosity
b. High viscosity
c. Medium viscosity
d. Viscosity is not important
5. In theory, the most desirable objectives governing D
the cleaning operations when removing surface pen-
etrant before inspection are to remove:
(Answer with A, B, C, or D)
a. Little penetrant from discontinuities and leave a
minimal of residual penetrant remaining on the sur-
face
b. Little penetrant from a discontinuity and leave no
residual penetrant remaining on the surface
c. No penetrant from discontinuities and leave a min-
imal of residual penetrant on the part surface
d. No penetrant from discontinuities and leave no
residual penetrant on the part surface
6. The best technique for removing excess water wash- D
able penetrant is to:
(Answer with A, B, C, or D)
a. Immediately immerse the part in the water rinse
tank
b. Use water running directly from a tap
c. Boil in hot water or steam spray
d. Use a hose and nozzle with a coarse spray
7. When removing excess post-emulsifiable penetrant in Coarse spray
a production situation involving relatively large irreg-
ularly shaped parts, you may use a:
a. Coarse spray
, Liquid Penetrant Testing PT Level III
Certification Questions with Answers Guide 2026
b. Strong water blast
c. Commerical solvent
d. Hot water immersion
8. The sensitivity of wet developers can be seriously im- B
paired:
(Answer with A, B, C, or D)
a. When the developer temperature is greater than
the ambient temperature
b. When the thickness of the coating becomes too
heavy
c. If the corrosion inhibitors are added to the develop-
er
d. If the surface of the part is polished
9. What type of developer is generally preferred for pol- Form D
ished or smooth surfaces with very fine, shallow dis-
continuities?
a. Form A
b. Form B
c. Form C
d. Form D
10. The best technique for drying after the application of D
a wet developer is normally:
(Answer with A, B, C, or D)
a. Blotting the surface gently with absorbent paper
toweling
b. Allowing the part to dry slowly at or slightly below
the ambient temperature
c. Rapid drying with a normal room temperature air
blast
, Liquid Penetrant Testing PT Level III
Certification Questions with Answers Guide 2026
d. Drying with circulating air at a maximum of 160
degrees F
11. Removal of residual penetrant or developer materials A
by a suitable post-cleaning technique is advantageous
in which of the following cases?
(Answer with A, B, C, or D)
a. Where it could interfere with subsequent processes
or with service
b. Where it could provide a contrasting background
c. Where it could assist in the emulsification of the
penetrant bleedout
d. Where it could assist in the lattice structure break-
down
12. Post-cleaning is particularly important where residual Corrosive action
penetrant or developer materials may combine with
other materials in service to produce:
a. False penetrant indications
b. Contrasting background
c. Corrosive action
d. Proper surface tension
13. Post-cleaning should be performed: A
(Answer with A, B, C, or D)
a. As soon as possible if the material is susceptible to
corrosion
b. After several hours because the drier the materials
are, the easier they can be wiped off
c. With the part warm to enhance the solubility of
penetrant material
Certification Questions with Answers Guide 2026
1. Chemical cleaners are often used for very dirty, greasy D
parts. If used, the surface should be subsequently
cleaned with:
(Answer with A, B, C, or D)
a. Acid type removal
b. Hot water
c. Solvent type paint remover
d. Hot tank alkaline cleaning
2. Generally, vapor degreasing is considered to be one A
of the best techniques for preparing a part for PT
because it is suitable for:
(Answer with A, B, C, or D)
a. Removal of organic contaminants
b. Removal of scale, rust, oxides, and corrosion
c. Use on chloride, sensitive metals
d. Removal of inorganic soils
3. When penetrant is applied to parts by dipping, the C
parts should be:
(Answer with A, B, C, or D)
a. Left in the tank during the entire dwell time
b. Set aside until the dwell time is up
c. Placed on a rack designed to return any excess
drainage to the dipping station
d. Placed in the alkaline solvent rinse tank immediate-
ly
4. With all other factors the same, when removing pene- High viscosity
trant from the surface by spray water wash, penetrant
in a crack would be harder to remove if it has which
viscosity?
, Liquid Penetrant Testing PT Level III
Certification Questions with Answers Guide 2026
a. Low viscosity
b. High viscosity
c. Medium viscosity
d. Viscosity is not important
5. In theory, the most desirable objectives governing D
the cleaning operations when removing surface pen-
etrant before inspection are to remove:
(Answer with A, B, C, or D)
a. Little penetrant from discontinuities and leave a
minimal of residual penetrant remaining on the sur-
face
b. Little penetrant from a discontinuity and leave no
residual penetrant remaining on the surface
c. No penetrant from discontinuities and leave a min-
imal of residual penetrant on the part surface
d. No penetrant from discontinuities and leave no
residual penetrant on the part surface
6. The best technique for removing excess water wash- D
able penetrant is to:
(Answer with A, B, C, or D)
a. Immediately immerse the part in the water rinse
tank
b. Use water running directly from a tap
c. Boil in hot water or steam spray
d. Use a hose and nozzle with a coarse spray
7. When removing excess post-emulsifiable penetrant in Coarse spray
a production situation involving relatively large irreg-
ularly shaped parts, you may use a:
a. Coarse spray
, Liquid Penetrant Testing PT Level III
Certification Questions with Answers Guide 2026
b. Strong water blast
c. Commerical solvent
d. Hot water immersion
8. The sensitivity of wet developers can be seriously im- B
paired:
(Answer with A, B, C, or D)
a. When the developer temperature is greater than
the ambient temperature
b. When the thickness of the coating becomes too
heavy
c. If the corrosion inhibitors are added to the develop-
er
d. If the surface of the part is polished
9. What type of developer is generally preferred for pol- Form D
ished or smooth surfaces with very fine, shallow dis-
continuities?
a. Form A
b. Form B
c. Form C
d. Form D
10. The best technique for drying after the application of D
a wet developer is normally:
(Answer with A, B, C, or D)
a. Blotting the surface gently with absorbent paper
toweling
b. Allowing the part to dry slowly at or slightly below
the ambient temperature
c. Rapid drying with a normal room temperature air
blast
, Liquid Penetrant Testing PT Level III
Certification Questions with Answers Guide 2026
d. Drying with circulating air at a maximum of 160
degrees F
11. Removal of residual penetrant or developer materials A
by a suitable post-cleaning technique is advantageous
in which of the following cases?
(Answer with A, B, C, or D)
a. Where it could interfere with subsequent processes
or with service
b. Where it could provide a contrasting background
c. Where it could assist in the emulsification of the
penetrant bleedout
d. Where it could assist in the lattice structure break-
down
12. Post-cleaning is particularly important where residual Corrosive action
penetrant or developer materials may combine with
other materials in service to produce:
a. False penetrant indications
b. Contrasting background
c. Corrosive action
d. Proper surface tension
13. Post-cleaning should be performed: A
(Answer with A, B, C, or D)
a. As soon as possible if the material is susceptible to
corrosion
b. After several hours because the drier the materials
are, the easier they can be wiped off
c. With the part warm to enhance the solubility of
penetrant material
