NACE CIP Level 1 Practical Exam
Questions and Answers
NACE SP0188 - Correct Answers -High and Low Voltage Holiday Testing
Low-Voltage Holiday Detector - Correct Answers --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
-Used on Coatings up to 20mils
-may be used on concrete
Low Voltage Holiday Detectors Common Errors - Correct Answers --Failure to Keep
probe in contact with surface
-Moving the electrode too fast or slow
-Over or under saturating the sponge
-Low battery or bad lead/ground connection
Type 1 DFT Gauge Potential Errors - Correct Answers -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 Answers -Defined by ASTM B244 as being sensitive to abrupt
changes in the surface contour of the test specimen.
Standards for DFT Measurement Frequency - Correct Answers --SSPC PA-2*
-IMO PSPC
-ASTM D 7091
-ISO 2808, 2178, 19840
Potassium Ferricyanide Qualitative Test for Soluble Salts - Correct Answers -Designed
to detect the presence of salt on the substrate. Not designed to measure the quantity of
these ions.
Telegraphing - Correct Answers -Can occur when surface is saturated with water and
the Detector reads a different area.
Questions and Answers
NACE SP0188 - Correct Answers -High and Low Voltage Holiday Testing
Low-Voltage Holiday Detector - Correct Answers --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
-Used on Coatings up to 20mils
-may be used on concrete
Low Voltage Holiday Detectors Common Errors - Correct Answers --Failure to Keep
probe in contact with surface
-Moving the electrode too fast or slow
-Over or under saturating the sponge
-Low battery or bad lead/ground connection
Type 1 DFT Gauge Potential Errors - Correct Answers -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 Answers -Defined by ASTM B244 as being sensitive to abrupt
changes in the surface contour of the test specimen.
Standards for DFT Measurement Frequency - Correct Answers --SSPC PA-2*
-IMO PSPC
-ASTM D 7091
-ISO 2808, 2178, 19840
Potassium Ferricyanide Qualitative Test for Soluble Salts - Correct Answers -Designed
to detect the presence of salt on the substrate. Not designed to measure the quantity of
these ions.
Telegraphing - Correct Answers -Can occur when surface is saturated with water and
the Detector reads a different area.
