Top 150+ Solved Liquid Penetrant Testing Level 1 MCQ Questions Answer
Q. Liquid penetrant testing is based on the principle of:
a. Polarized sound waves in a liquid
b. Magnetic domains
c. Absorption of X rays
d. Capillary action
Q. When a small diameter tube is placed in a glass of water, water rises in the tube to alevel above the adjacent surface. This is called:
a. Viscosity
b. Capillary action
c. Surface tension
d. Barometric testing
Q. How is the size of a liquid penetrant indication usually related to the discontinuity itrepresents:
a. Larger than
b. Smaller than
c. Equal to
d. Not related to
Q. A penetrant that is self-emulsifying is called:
a. Solvent removable
b. Water washable
c. Post-emulsified
d. Dual sensitivity method
Q. A penetrant process which employs an emulsifier as a separate step in the penetrantremoval process is called:
a. Solvent removable
b. Water washable
c. Post-emulsified
d. Dual sensitivity method
Q. A penetrant process in which excess penetrant is removed with an organic solvent iscalled:
a. Solvent removable
b. Water washable
c. Post-emulsified
d. Dual method
Q. Which of the following statements accurately describes the capabilities of liquidpenetrant testing?
a. Liquid penetrant testing is useful for locating subsurface discontinuities in a test piece
b. Liquid penetrant testing is useful for locating discontinuities in porous materials
c. Liquid penetrant testing is useful for locating discontinuities which are open to the surface in non-porous materials
d. none of the above
Q. Which of the following discontinuity types could typically be found with a liquidpenetrant test?
a. Internal slag in a weld
b. Internal slag in a casting
c. Sensitization in austenitic stainless steel
d. Fatigue cracks
Q. Which of the following chemical elements are normally held to a minimum in liquidpenetrant materials, when testing stainless steel and titanium?
a. Hydrogen
b. Chlorine
c. Carbon
d. Oil
Q. Which of the following chemical elements are normally held to a minimum in liquidpenetrant materials when testing nickel based alloys?
a. Sulphur
b. Oxygen
c. Carbon
d. Nitrogen
Q. Which of the following is the most desirable method of pre-cleaning a test piece priorto penetrant testing?
a. Sand blasting
b. Vapour degreasing
c. Emery cloth
d. Wire brushing
Q. Which of the following pre-cleaning processes is not recommended?
a. Detergent cleaning
b. Vapour degreasing
c. Shot blasting
d. Ultrasonic cleaning
Q. A wire brush should be used for pre-cleaning:
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
Q. A hydrometer is used to measure:
a. Penetrant viscosity
b. Specific gravity of water based wet developers
c. Penetrant specific gravity
d. Cleaner specific gravity
Q. Visible, solvent removable penetrants are most advantageous for:
a. Inspecting parts with rough surfaces
b. Inspecting batches of small parts
c. Inspecting parts at remote locations
d. Inspecting parts with porous surfaces