Liquid Penetrant Testing PT Level I Exam
Practice 2026
1. Liquid penetrant testing is based on the principle of: Capillary action
a. Polarized sound waves in a liquid
b. Magnetic domains
c. Absorption of X-rays
d. Capillary action
2. When a small diameter tube is placed in a glass of wa- Capillary action
ter, water rises in the tube to a level above the adjacent
surface. This is called:
a. Viscosity
b. Capillary action
c. Surface tension
d. Barometric testing
3. How is the size of a liquid penetrant indication usually Larger than
related to the discontinuity it represents:
a. Larger than
b. Smaller than
c. Equal to
d. Not related to
4. A penetrant that is self0emulsifying is called: Water washable
a. Solvent removable
b. Water washable
c. Post-emulsified
d. Dual sensitivity method
5. A penetrant process which employs an emulsifier as Post emulsified
a separate step in the penetrant removal process is
called:
a. Solvent removable
b. Water washable
, Liquid Penetrant Testing PT Level I Exam
Practice 2026
c. Post emulsified
d. Dual sensitivity method
6. A penetrant process in which excess penetrant is re- Solvent removable
moved with an organic solvent is called:
a. Solvent removable
b. Water washable
c. Post emulsified
d. Dual method
7. Which of the following statements accurately de- C
scribes the capabilities of liquid penetrant testing?
(Answer with A, B, C, or D)
a. Liquid penetrant testing is useful for locating sub-
surface discontinuities in a test
b. Liquid penetrant testing is useful for locating discon-
tinuities in porous materials
c. Liquid penetrant testing is useful for locating discon-
tinuities which are open to the surface in non porous
materials
d. None of the above
8. which of the following discontinuity types could typi- Fatigue cracks
cally be found with a liquid penetrant test?
a. Internal slag in a weld
b. Internal slag in a casting
c. Sensitization in austenitic stainless steel
d. Fatigue cracks
9. Which of the following chemical elements are normally Chlorine
held to a minimum in liquid penetrant materials, when
testing stainless steel and titanium?
a. Hydrogen
, Liquid Penetrant Testing PT Level I Exam
Practice 2026
b. Chlorine
c. Carbon
d. Oil
10. Which of the following chemical elements are normally Sulfur
held to a minimum in liquid penetrant materials when
testing nickel based alloys?
a. Sulfur
b. Oxygen
c. Carbon
d. Nitrogen
11. Which of the following is the most desirable method of Vapor degreasing
pre-cleaning a test piece prior to penetrant testing?
a. Sand blasting
b. Vapor degreasing
c. Emery cloth
d. Wire brushing
12. Which of the following pre-cleaning processes is not Shot blasting
recommended?
a. Detergent cleaning
b. Vapor degreasing
c. Shot blasting
d. Ultrasonic cleaning
13. A wire brush should be used for pre-cleaning: C
(Answer with A, B, C, or D)
a. When grease and oil must be removed
b. Only as a last resort
c. When rust is to be removed
d. When grinding burrs must be removed
Practice 2026
1. Liquid penetrant testing is based on the principle of: Capillary action
a. Polarized sound waves in a liquid
b. Magnetic domains
c. Absorption of X-rays
d. Capillary action
2. When a small diameter tube is placed in a glass of wa- Capillary action
ter, water rises in the tube to a level above the adjacent
surface. This is called:
a. Viscosity
b. Capillary action
c. Surface tension
d. Barometric testing
3. How is the size of a liquid penetrant indication usually Larger than
related to the discontinuity it represents:
a. Larger than
b. Smaller than
c. Equal to
d. Not related to
4. A penetrant that is self0emulsifying is called: Water washable
a. Solvent removable
b. Water washable
c. Post-emulsified
d. Dual sensitivity method
5. A penetrant process which employs an emulsifier as Post emulsified
a separate step in the penetrant removal process is
called:
a. Solvent removable
b. Water washable
, Liquid Penetrant Testing PT Level I Exam
Practice 2026
c. Post emulsified
d. Dual sensitivity method
6. A penetrant process in which excess penetrant is re- Solvent removable
moved with an organic solvent is called:
a. Solvent removable
b. Water washable
c. Post emulsified
d. Dual method
7. Which of the following statements accurately de- C
scribes the capabilities of liquid penetrant testing?
(Answer with A, B, C, or D)
a. Liquid penetrant testing is useful for locating sub-
surface discontinuities in a test
b. Liquid penetrant testing is useful for locating discon-
tinuities in porous materials
c. Liquid penetrant testing is useful for locating discon-
tinuities which are open to the surface in non porous
materials
d. None of the above
8. which of the following discontinuity types could typi- Fatigue cracks
cally be found with a liquid penetrant test?
a. Internal slag in a weld
b. Internal slag in a casting
c. Sensitization in austenitic stainless steel
d. Fatigue cracks
9. Which of the following chemical elements are normally Chlorine
held to a minimum in liquid penetrant materials, when
testing stainless steel and titanium?
a. Hydrogen
, Liquid Penetrant Testing PT Level I Exam
Practice 2026
b. Chlorine
c. Carbon
d. Oil
10. Which of the following chemical elements are normally Sulfur
held to a minimum in liquid penetrant materials when
testing nickel based alloys?
a. Sulfur
b. Oxygen
c. Carbon
d. Nitrogen
11. Which of the following is the most desirable method of Vapor degreasing
pre-cleaning a test piece prior to penetrant testing?
a. Sand blasting
b. Vapor degreasing
c. Emery cloth
d. Wire brushing
12. Which of the following pre-cleaning processes is not Shot blasting
recommended?
a. Detergent cleaning
b. Vapor degreasing
c. Shot blasting
d. Ultrasonic cleaning
13. A wire brush should be used for pre-cleaning: C
(Answer with A, B, C, or D)
a. When grease and oil must be removed
b. Only as a last resort
c. When rust is to be removed
d. When grinding burrs must be removed
