E1-PT-S-2 - APEX-FI

A generally accepted method for removing excess nonwater-washable penetrant is:

repeatedly dipping the test specimen in a cleaner
soaking the test specimen in hot detergent water
blowing the excess penetrant off the surface of the part with compressed air
wiping and cautiously cleaning the test specimen with a cleaner-dampened cloth

The most common type of contaminant in fluorescent penetrant fluid is:

metal filings
oil
detergents (from cleaning)
water

The first step in conducting a liquid penetrant test on a surface that has been painted is to:

carefully apply the penetrant over the surface
completely remove the paint
thoroughly wash the surface with a detergent
wire brush the surface to roughen the smooth surface coating of the paint

When using a post-emulsification penetrant, it is necessary to apply the emulsifier

before applying the penetran
after the water wash operation
after the dwell time has elapsed
after the development time has elapsed

When conducting a water-washable liquid penetrant test, the wet developer is applied:

immediately after the penetrant has been applied
immediately before the penetrant is applied
after removal of the penetrant
after removal of the emulsifier

Which of the following discontinuities is most likely to be missed due to improper rinse techniques?

a forging lap
deep pitting
shallow and broad discontinuities
the rinse technique will not affect the detection of discontinuities

When an inspector is working in a darkened area, he/she should become adjusted to the dark before inspecting parts. The generally accepted time period for becoming accustomed to the dark is:

1 minute
5 to 10 minutes
10 to 15 minutes
no waiting period is necessary

Liquid penetrant testing can be used to detect:

discontinuities 1.6 mm (0.06 in.) below the surface
internal discontinuities
discontinuities open to the surface
all discontinuities

Which of the statements below best states the danger of sandblasting (without subsequent chemical etching) for cleaning surfaces to be penetrant tested?

the discontinuities may be peened over and closed
oil contaminants might be sealed in the discontinuities
the sand used in the sandblasting operation may be forced into the discontinuity
the sandblasting operation may introduce discontinuities

When conducting a penetrant test using a fluorescent penetrant, black light equipment is required to:

cause the penetrant to fluoresce
aid the normal capillary action characteristics of a penetrant
neutralize excess penetrant on the surface
decrease the surface tension of the part

If a part to be penetrant tested is first heated to a high temperature, the penetrant:

may become viscous
may “flash” or evaporate very rapidly
may lose some of its color brilliance
will better show discontinuities

Which of the following conditions will decrease the life of a black light bulb?

line voltage fluctuations
dust on the face of the bulb
changes in room temperature
all of the above

Which one of the following statements is an incorrect use of crack panels (blocks)?

to establish a standard size of crack that can be reproduced as needed
to determine the relative sensitivities of two different penetrants
to determine if a penetrant has lost or has reduced brilliance on fluorescent penetrants because of contamination
to determine the degree or method of cleaning necessary to remove penetrant on the surface without removing it from the cracks

A serious loss of water in a wet developer mix or an excessive over-concentration of developer powder can cause:

a loss of fluorescence during the inspection operation
nonrelevant indications
cracking of the developer coating during the drying operation
none of the above

Penetrant is applied to a part by dipping. The part is then placed on a rack while the penetrant seeps into discontinuities. If the penetration time is too long, it will be difficult to rinse the penetrant from the part. If this happens, the normal rinsing properties can be restored by:

chilling the part to a temperature of 4ºC (40ºF)
heating the part to a temperature of 54ºC (130ºF)
redipping the part
applying a wet developer before attempting to rinse the part

When using a fluorescent penetrant, the actual inspection must be performed:

in a brightly lighted room
with the part at a temperature between 10 and 79ºC (125 and 175ºF)
immediately after the developer has been applied
in a darkened area under a black light

Which of the following would be the most desirable center wavelength for the output of the light source used in fluorescent processes?

3200 A (320 nm)
3650 A (365 nm)
5200 A (1520 nm)
5650 A (565 nm)

Bleed-out of penetrant from a cold shut is an example of:

a false indication
a nonrelevant indication
a true indication
none of the above

Liquid penetrants become sluggish and lose sensitivity at temperatures:

above 38ºC (100 ºF)
between 10 and 38 ºC (50 and 100 ºF)
below 10 ºC (50 ºF)
below 21 ºC (70 ºF)

Round or nearly round indications on the surface of a test article are indications of:

Cracks
Nonmetallic inclusions
Seams
Porosity

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