Questions and Correct answers
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Type 1 DFT Gauge Potential Errors - correct answer -DO NOT Use Gauge:
-On soft or tacky films
-On or near vibrating surfaces
- Within 1 inch of an edge
-On metal being welded (can demagnetize unit)
-Keep magnet tip clean of magnetic particles and residue
-On Circular Pieces locate the Gauge along the longitudinal axis
Edge Effect - correct answer -Defined by ASTM B244 as being sensitive
to abrupt changes in the surface contour of the test specimen.
Standards for DFT Measurement Frequency - correct answer --SSPC PA-
2*
, -IMO PSPC
-ASTM D 7091
-ISO 2808, 2178, 19840
Potassium Ferricyanide Qualitative Test for Soluble Salts - correct
answer -Designed to detect the presence of salt on the substrate. Not
designed to measure the quantity of these ions.
Potassium Ferricyanide Test Procedure - correct answer --Use Test Paper
that comes with the Potassium Ferricyanide
-Misting the surface with distilled water
-Wipe Test paper to misted surface
-A dark blue color will indicate the presence of soluble salts.
NACE SP0188 - correct answer -High and Low Voltage Holiday Testing
Low-Voltage Holiday Detector - correct answer --Ground is attached
directly to substrate.
-Sponge saturated with a solution of tap water/wetting agent
-Proper mix ratio 1oz/USgal
-Proper of speed is 1ft/sec Double Stroke