PT Study Questions Flashcards
(49 cards)
1) One disadvantage of liquid penetrant inspection is that:
a. penetrant materials may cause drying and cracking of the skin
b. large subsurface discontinuities with openings to the surface will not form indications
c. it can only be used with nonferrous material
d. the materials are only available in aerosol spray cans
a. penetrant materials may cause drying and cracking of the skin
2) Which of the following is not a physical property associated with penetrant materials?
a. Solvent resistance
b. Flash point
c. Viscosity
d. Chemical inertness
a. Solvent resistance
3) The removal of smeared metal by chemical processes is called:
a. grit or sand blasting
b. machining
c. etching
d. quenching
c. etching
4) A standard classification for a type of developer is:
a. water soluble
b. water washable
c. nonfluorescent
d. solvent removable
a. water soluble
5) A penetrant inspection cannot find:
a. surface porosity
b. surface cracks
c. an internal cavity
d. a surface forging lap
c. an internal cavity
6) Which of the methods listed below is most applicable for detecting fine, tight surface cracks?
a. Visible dye, water washable
b. Visible dye, postemulsifiable
c. Fluorescent, water washable
d. Fluorescent, postemulsifiable
d. Fluorescent, postemulsifiable
7) The term used to describe the total time that penetrant remains on the workpiece is:
a. immersion
b. drain
c. dwell
d. presoak
c. dwell
8) Developer assists in the detection of discontinuities by:
a. providing a contrasting background
b. emulsifying the penetrant bleedout
c. providing a clean surface
d. providing a dry surface
a. providing a contrasting background
9) Difficulties with removal of a postemulsifiable penetrant during the rinse operation can be overcome by:
a. reapplying a coating of emulsifier
b. using conditioned (soft) water during the washing operation
c. cleaning, then completely reprocessing the part using a longer emulsification time
d. increasing the water temperature during the washing operation
c. cleaning, then completely reprocessing the part using a longer emulsification time
10) Excessive removal of penetrant may result in:
a. undetected discontinuities during evaluation
b. an excessive background that inhibits the evaluation process
c. the need to apply the developer twice to obtain significant bleedout
d. small, tight cracks that are easily detected on parts with a smooth surface
a. undetected discontinuities during evaluation
11) Which of the following is an advantage of a fluorescent water washable penetrant system compared to a fluorescent postemulsifiable penetrant system?
a. Water washable is superior for testing critical in service parts
b. Water washable has fewer processing steps
c. Only wet developer may be used with postemulsifiable penetrants
d. Water washable penetrants will more readily detect fine, tight cracks in weldments
b. Water washable has fewer processing steps
12) Which of the following is not an advantage of postemulsifiable fluorescent penetrants?
a. High sensitivity level to detect very fine defects
b. They are easily removed with water after proper emulsification dwell time
c. They are easily removed from sand castings after proper emulsification dwell time
d. They have higher tolerance to variations in the removal process when compared to water washable penetrants
c. They are easily removed from sand castings after proper emulsification dwell time
13) When using the visible, solvent removable process, after the penetrant dwell time, excess penetrant is removed by:
a. spraying solvent on the part and then wiping with a clean, dry rag or paper towel
b. wiping off excess penetrant with a clean, dry rag or paper towel, moistening the part with solvent and rewiping the part
c. wiping off excess penetrant with a clean, dry rag or paper towel, moistening a clean cloth with solvent and rewiping the part
d. wiping off excess penetrant with a clean, dry rag or paper towel, then rewiping with a cloth soaked with solvent
c. wiping off excess penetrant with a clean, dry rag or paper towel, moistening a clean cloth with solvent and rewiping the part
14) When using a fluorescent, postemulsifiable penetrant, the best emulsification time is:
a. 10 s
b. 5 s
c. 2 to 3 s
d. determined by experimentation
d. determined by experimentation
15) Which type of developer is generally considered the most sensitive for locating fine discontinuities?
a. Solvent suspended
b. Water soluble
c. Water suspended
d. Dry powder
a. Solvent suspended
16) Which of the following penetrant systems is the least sensitive?
a. fluorescent, postemulsifiable
b. visible, solvent removable
c. fluorescent, solvent removable
d. fluorescent, water washable
b. visible, solvent removable
17) One method for applying dry developer to a localized area of a large part is with:
a. a brush
b. a powder bulb
c. an aerosol can
d. an immersion tank
b. a powder bulb
18) Prewash and postwash stations are an advantage when using which of the following penetrant methods?
a. Visible, lipophilic postemulsifiable
b. Fluorescent, hydrophilic postemulsifiable
c. Visible, water washable
d. Fluorescent, lipophilic postemulsifiable
b. Fluorescent, hydrophilic postemulsifiable
19) The specific gravity of wet developer is measured with a:
a. developer gage
b. hydrogage
c. balance scale
d. hydrometer
d. hydrometer
20) Which of the following describes the comparator that is used to monitor the process performance of the penetrant system?
a. A panel with one half chrome plated containing five crack centers and the other half grit blasted
b. A cracked aluminum block with a groove in the center
c. A chrome plated panel with fine cracks across the face to a depth equal to the plating thickness
d. Ceramic coated block with fine cracks extending around the entire panel
a. A panel with one half chrome plated containing five crack centers and the other half grit blasted
21) Ultraviolet light intensity is measured with:
a. a digital or analog UV-A meter
b. a photographic light meter
c. an infrared meter
d. a standard white light meter
a. a digital or analog UV-A meter
22) What instrument is used to check hydrophilic emulsifier concentration?
a. A hydrometer
b. A capillary fill barometer
c. A centrifuge tube
d. A refractometer
d. A refractometer
23) The penetrant performance characteristic known as sensitivity is defined as the:
a. the contrast between an indication and the background
b. ability to produce a visible indication from a small, tight linear discontinuity
c. volume percentage of penetrant that remains in a discontinuity after processing
d. ability to enter a discontinuity to form an indication
b. ability to produce a visible indication from a small, tight linear discontinuity
24) A group of nearly rounded indications located in an area that transitions between thick and thin sections of aluminum castings is known as:
a. shrinkage cracks
b. gas holes
c. laminations
d. cracks due to heat treating
a. shrinkage cracks