Top 150+ Solved Liquid Penetrant Testing Level 1 MCQ Questions Answer
Q. Which type of penetrant process affords most control of test sensitivity level?
a. Solvent removable
b. Water washable
c. Post emulsifiable
d. Fluorescent
Q. Which type of penetrant process is least susceptible to over washing?
a. Solvent removable
b. Water washable
c. Post emulsifiable
d. Fluorescent
Q. What is a disadvantage of the solvent removable penetrant process?
a. It is the least sensitive of the penetrant processes
b. It is not well suited for use on rough surfaces
c. It is highly portable
d. No water is required for its use
Q. Which of the following is the proper first step in removal of excess penetrant when using the solvent removable penetrant process?
a. Immerse the test piece in solvent
b. Spray the test piece with water
c. Wipe the test piece surface with clean, lint free towels slightly moistened
d. All of the above is correct
Q. Which of the following types of penetrants, developers, solvents are used when conducting a liquid penetrant test on a part that is exposed to a liquid oxygen environment.
a. Water based penetrants
b. Water based developers
c. Water based solvents
d. All of the above
Q. The causes of non relevant indications are:
a. Insufficient removal of excess surface penetrant
b. Penetrant on operators hands
c. Threads, keyways, splines, sharp corners, press fits, blind holes, rough surfaces
d. Contaminated work surfaces
Q. Which of the following metals must be tested with low halogen sulphur free penetrantmaterials:
a. Copper, silver, gold
b. Nickel based alloys, certain stainless steel materials
c. Steel, iron, aluminium
d. Plastic, wood, paper
Q. Penetrant testing is limited by its inability to test which of the following materials:
a. Aluminium
b. Ceramics
c. Porous materials
d. Moulded rubber
Q. Liquid penetrants can be further categorised by the removal method of excess surfacepenetrant:
a. Water washable
b. Solvent removable
c. Post emulsified
d. All of the above
Q. The typical temperature ranges for conducting a liquid penetrant test is:
a. 60 to 100ºC
b. 10 to 60ºF
c. 16 to 52ºC
d. 10 to 20ºK
Q. Surface breaking porosity will show what type of relevant indications when a weldedaluminium plate is tested with the liquid penetrant method:
a. Linear indications
b. Square indications
c. Triangular indications
d. Rounded indications
Q. Cracks, lack of penetration, lack of fusion which are surface breaking on a weldedaluminium plate which has been liquid penetrant tested will show as:
a. Linear indications
b. Rounded indications
c. Square indications
d. Triangular indications
Q. Which of the following methods is not recommended for pre-cleaning prior to a liquidpenetrant test:
a. Steam cleaning, etching, rust and paint removal
b. Solvent wipe, vapour degreasing, ultrasonic bath cleaning
c. Blasting, grinding, filing, honing, machining
d. All of the listed methods are not recommended
Q. The purpose of using a developer is:
a. To create a contrasting background for the penetrants to ensure better visibility of indications
b. Assists in reverse capillary action due to absorption ability of developers
c. Prevent the part from corroding after the liquid penetrant test
d. To ensure that the part has been correctly heat treated
Q. The typical sequence of conducting a visible solvent removable penetrant is:
a. Pre-clean with a solvent wipe method
b. Apply visible penetrant, keep wet, dwell time of 2 minutes
c. Pour solvent on surface of part and wipe with waste cloth
d. Spray on a thick layer of developer