PT Level II
A
A common application of an aluminum block containing quench cracks is to: (Answer with A, B, C, or D) a. Determine penetrant test sensitivity b. Compare performance of penetrant materials or processes c. Determine effects of mechanical cleaning methods on penetrant test results d. Determine effectiveness of cleaning techniques
D
A disadvantage of the post emulsifiable penetrant process is that: (Answer with A, B, C, or D) a. Test pieces can be re processed several times with little loss of sensitivity b. It is not very sensitive to open, shallow discontinuities c. It is less sensitive to degradation in the presence of acids and chromates d. Emulsifier application is an extra processing step
Post emulsifying
A penetrant testing method in which an emulsifier, separate from the penetrant, is used is called: a. Solvent removable b. Water washable c. Post emulsifying d. Self emulsifying
Water washable
A penetrant testing method in which the degree of washability can be controlled by the operator is called: a. Self emulsifying b. Post emulsifiable c. Water washable d. Solvent removable
Water washable
A penetrant which contains an emulsifier is called: a. Solvent removable b. Water washable c. Post emulsifiable d. Solvent suspended
Post emulsifiable
A penetrant which requires a separate emulsification step prior to removal from the surface of the test piece is called? a. Solvent removable b. Water washable c. Post emulsifiable d. Solvent suspended
Ultrasonic cleaning
A soft aluminum test piece is to be penetrant tested. The piece has previously been sand blasted to remove tightly adhering soils. What additional surface preparation should be performed? a. Etching b. Solvent cleaning c. Ultrasonic cleaning d. Grinding
All of the above
Acceptable methods to apply emulsifier are: a. Dipping b. Flowing c. Spraying d. All of the above
B
An advantage of emulsifier application by dipping is: (Answer with A, B, C, or D) a. Excess penetrant is recovered in the emulsifier tank and reprocessed b. All of the test object is coated at approximately the same time c. Excess emulsifier drains back into the emulsifier tank for re-use d. Hydrophilic scrubbing is then easier to perform
A
An advantage of the post emulsifiable penetrant testing process is that: (Answer with A, B, C, or D) a. Test pieces can be re processed several times with little loss of sensitivity b. It is the most economical penetrant testing process c. It is highly susceptible to over washing d. It is not self emulsifying
Dipping, brushing or spraying
Application of penetrant to a test piece may be by: a. Dipping, brushing or spraying b. Spraying only c. Brushing or spraying only d. Dipping or spraying only
Chlorine and sulfur
Contaminants which are commonly limited in penetrant materials are: a. Hydrogen and chlorine b. Carbon and sulfur c. Hydrogen and carbon d. Chlorine and sulfur
A
Correct developer coating thickness is indicated by a(n): (Answer with A, B, C, or D) a. Even, snowy white appearance b. Slightly pinkish background c. Fine, misting spray d. Thin, translucent layer
Any of the above
Dried, non-aqueous developers are best removed after penetrant testing by: a. Solvent cleaning b. Wiping with a water dampened cloth c. Wiping with a dry towel d. Any of the above
Fine, tight cracks
Emulsification time is less critical for the detection of: a. Fine, tight cracks b. Wide, shallow discontinuities c. Internal porosity d. None of the above
Non relevant
Indications which are caused by design or construction of the test piece are called? a. Relevant b. Non relevant c. False d. Real
Non relevant
Indications which are caused by something other than a discontinuity are called: a. Relevant b. Non relevant c. False d. Real
200 volts
Mercury vapor black lights may be extinguished if the supply voltage drops below about: a. 120 volts b. 90 volts c. 220 volts d. 200 volts
Post emulsifiable
Open, shallow discontinuities are best detected by which penetrant testing method? a. Solvent removable b. Water washable c. Post emulsifiable d. None of the above
Water washable
Over washing during excess penetrant removal is less likely with which penetrant testing process? a. Solvent removable b. Water washable c. Post emulsifiable d. Self emulsifying
Interpretation
The act of determining the cause of an indication is called: a. Interpretation b. Inspection c. Evaluation d. Determination
Evaluation
The act of determining the effect of a discontinuity of the usefulness of a part is called: a. Interpretation b. Inspection c. Evaluation d. Determination
Safety
The chief advantage of using a water washable penetrant process is: a. Sensitivity b. Safety c. Water tolerance d. Economics
D
The fluorescent dyes used in the liquid penetrant testing process are most active when energized with black light of what wavelengths? (A stands for angstrom units) (Answer with A, B, C, or D) a. 2.0 x 10^-7m (2000 A) b. 2.5 x 10^-7m (2500 A) c. 3.25 x 10^-7m (3250 A) d. 3.65 x 10^-7m (3650 A)
Blue violet
The human eye is most sensitive to which of the following types of light? a. Yellow green b. Red c. Blue violet d. Orange
Penetrant dwell time
The most important penetrant test processing time to control is: a. Penetrant dwell time b. Emulsifier dwell time c. Water rinse time d. Development time
Portability
The most significant advantage of the visible solvent removable penetrant process is? a. Its suitability for penetrant testing of article with rough surfaces b. Portability c. Its non corrosive properties d. Ability to allow retest
Both A and B
The output of a mercury vapor black light depends on: a. Cleanliness of its filter b. Age of the bulb c. Both A and B d. None of the above
Post emulsifiable
The penetrant process best suited for the detection of very fine discontinuities is: a. Solvent removable b. Water washable c. Post emulsifiable d. Magnetic particle
Water washable
The penetrant process best suited for use on parts with keyways and threads is: a. Solvent removable b. Water washable c. Post emulsifiable d. None of the above
Water washable
The penetrant process best suited to use on parts with rough surfaces is: a. Solvent removable b. Water washable c. Post emulsifiable d. Magnetic particle
C
What amount of time is normally considered necessary for dark adaption of the eyes prior to performing a fluorescent penetrant test? (Answer with A, B, C, or D) a. None requred b. 1-2 minutes c. 3-5 minutes d. 5-10 minutes
C
What are the two most important properties in determining the penetrating ability of a penetrant? (Answer with A, B, C, or D) a. Viscosity and surface tension b. Viscosity and contact angle c. Surface tension and wetting ability d. None of the above
Water
What is the most common source of penetrant bath contamination? a. Emulsifier b. Water c. Developer d. Solvent
D
What is the proper technique for removal of excess penetrant from a part when using a water washable penetrant process? (Answer with A, B, C, or D) a. Fine spray normal to the surface b. Coarse spray normal to the surface c. Fine spray at 45 degrees to the surface d. Coarse spray at 45 degrees to the surface
None of the above
What type of penetrant process would be best suited to an application at near freezing temperatures? a. Solvent removable b. Water washable c. Post emulsifiable d. None of the above
5 minutes
When a mercury vapor black light is first turned on, what minimum warm-up time is normally required? a. None b. 2-3 minutes c. 5 minutes d. 10 minutes
5 minutes
When a mercury vapor black light is inadvertently cut off, approximately how long should it be allowed to cool before attempting to restart? a. Not required b. 2-3 minutes c. 5 minutes d. 10 minutes
Avoid over washing
When using a water washable penetrant testing process, why should the water rinse temperature remain constant? a. Avoid changes in rinse efficiency b. Maintain the temperature of the part c. Avoid over washing d. Avoid under washing
Cold shuts
Which of the following discontinuities would you not expect to find in a casting? a. Shrinkage cracks b. Incomplete penetration c. Cold shuts d. Porosity
D
Which of the following is normally considered acceptable practice? (Answer with A, B, C, or D) a. Sand blasting a soft aluminum part during pre cleaning b. Performing a fluorescent penetrant test following a visible penetrant test c Performing a re-test on a par tested with water washable penetrant process d. Removing excess penetrant with a water spray
C
Which of the following is not an advantage of a water washable fluorescent penetrant process? (Answer with A, B, C, or D) a. Excess penetrant is easily removed with a water wash b. It is well suited to testing large quantities of small parts c. It is readily removed from shallow discontinuities d. It has low cost, low processing time compared to the post emulsified penetrant process
A
Which of the following is not normally recommended? (Answer with A, B, C, or D) a. Performing a fluorescent penetrant test following a visible penetrant test? b. Performing a visible penetrant test following a fluorescent test c. Removing excess penetrant with a water spray d. Removing excess penetrant with towels moistened with solvent
C
Which penetrant test processes commonly use the same penetrants? (Answer with A, B, C, or D) a. Water washable b. Water washable and solvent removable c. Solvent removable and post emulsifier d. None of the above
Die casting
Which type of casting is made in a metal mold? a. Investment casting b. Sand casting c. Die casting d. Lost wax process
Dry
Which type of developer does not provide a contrasting background against which to view penetrant indications? a. Dry b. Non aqueous wet c. Water soluble d. Water suspendable
Dry
Which type of developer should not be used with a visible dye penetrant process? a. Dry b. Non aqueous wet c. Water soluble d. Water suspendable
Non aqueous wet
Which type of developer would you use to obtain the highest sensitivity test results? a. Dry b. Non aqueous wet c. Aqueous wet d. Lipophilic
Excess penetrant removal
While performing a fluorescent water washable penetrant test, which of the following steps should be performed under black light? a. Penetrant application b. Excess penetrant removal c. Emulsification d. Developer application
C
Why might steel parts have a greater tendency towards rusting after penetrant testing? (Answer with A, B, C, or D) a. Penetrant materials are normally corrosive b. Penetrant materials residues are hydroscopic c. Any protective oils are remove during penetrant testing d. This is true only if the developer and penetrant residues are not removed after testing
