NACE CIP 1 Exam Questions with Verified Answers (Correct Update)
Question 1: High-Voltage AC Holiday Detector
Answer: This uses a 110 V or 220 V power supply. The AC detector is based on the principle of the
Tesla coil and does not use a ground wire. The probe emits a blue corona, which is attracted to any
ground.
Question 2: High-Voltage Constant Current DC Holiday Detector
Answer: This instrument is used to detect coating holidays in dielectric coatings. Once the voltage is
set, pass the electrode over the sur- face. A spark will arc through the air gap, causing the detector to
emit an audible sound.
Question 3: High-Voltage Pulse-Type DC Holiday Detector
Answer: This instrument is ideal for use in moist conditions. Pass the electrode over the surface. A
spark will arc through the air gap at any hol- idays, voids, or discontinuities, causing the detector to
emit an audible sound.
Question 4: Low-Voltage Holiday Detector
Answer: This instrument is a sensitive, low-voltage (wet-sponge) electronic device powered by a
battery with output voltages ranging from 5-120 V DC.
Question 5: BMR (Base Metal Readings)
Answer: To adjust for surface roughness, measure the blast profile of the steel to be painted at a
number of spots to obtain a representative average value. This average value is the base metal reading
(BMR).
Question 6: DFT Gauge (Type 1)
Answer: instruments are described as magnetic pull-off gauges. The force required to pull a magnet
from a ferrous surface is used to determine the film thickness.
Question 7: DFT Gauge (Type 2)
Answer: instruments are electronic gauges. They use electronic circuitry to convert a reference signal
into coating thickness.
Page 1
, Question 8: BMR (Base Metal Readings)
Answer: To adjust for surface roughness, measure the blast profile of the steel to be painted at a
number of spots to obtain a representative average value. This average value is the base metal reading
(BMR).
Question 9: Wet Film Comb
Answer: Instrument used to measure film thickness. The comb is pushed into the film. Upon removal,
the thickness mea- sure is shown on the gauge.
Question 10: Chlorides
Answer: are the salts of hydrochloric acid HCl. The chloride ion forms when the element chlorine
picks up one electron to form the anion Cl− (a negatively-charged ion).
Question 11: Nitrates
Answer: Nitrates are salts of nitric acid with an ion composed of one nitrogen and three oxy- gen
atoms (NO−3).
Question 12: Soluble Salts
Answer: These are non-visible and require testing to determine their presence. Although they are
termed "soluble" they really are not very soluble at all.
Question 13: Sulfates
Answer: are the salts of sulfuric acid; the IUPAC-recommended spelling is sulfate; the British English
spelling is sulphate.
Question 14: Acidic Cleaners
Answer: Cleaners that remove soil by chemical attack; they dissolve the reaction products. They are
usually composed of fairly strong acids, such as phosphoric acid (H3PO4), with small quantities of
surfactants, water-miscible solvents, and organic wetting and emulsi- fying agents.
Question 15: Alkaline Cleaners
Answer: Cleaners that saponify most oils and greases, and their surface-active components wash away
other contaminants. These cleaners may also saponify certain coating vehicles.
Page 2
Question 1: High-Voltage AC Holiday Detector
Answer: This uses a 110 V or 220 V power supply. The AC detector is based on the principle of the
Tesla coil and does not use a ground wire. The probe emits a blue corona, which is attracted to any
ground.
Question 2: High-Voltage Constant Current DC Holiday Detector
Answer: This instrument is used to detect coating holidays in dielectric coatings. Once the voltage is
set, pass the electrode over the sur- face. A spark will arc through the air gap, causing the detector to
emit an audible sound.
Question 3: High-Voltage Pulse-Type DC Holiday Detector
Answer: This instrument is ideal for use in moist conditions. Pass the electrode over the surface. A
spark will arc through the air gap at any hol- idays, voids, or discontinuities, causing the detector to
emit an audible sound.
Question 4: Low-Voltage Holiday Detector
Answer: This instrument is a sensitive, low-voltage (wet-sponge) electronic device powered by a
battery with output voltages ranging from 5-120 V DC.
Question 5: BMR (Base Metal Readings)
Answer: To adjust for surface roughness, measure the blast profile of the steel to be painted at a
number of spots to obtain a representative average value. This average value is the base metal reading
(BMR).
Question 6: DFT Gauge (Type 1)
Answer: instruments are described as magnetic pull-off gauges. The force required to pull a magnet
from a ferrous surface is used to determine the film thickness.
Question 7: DFT Gauge (Type 2)
Answer: instruments are electronic gauges. They use electronic circuitry to convert a reference signal
into coating thickness.
Page 1
, Question 8: BMR (Base Metal Readings)
Answer: To adjust for surface roughness, measure the blast profile of the steel to be painted at a
number of spots to obtain a representative average value. This average value is the base metal reading
(BMR).
Question 9: Wet Film Comb
Answer: Instrument used to measure film thickness. The comb is pushed into the film. Upon removal,
the thickness mea- sure is shown on the gauge.
Question 10: Chlorides
Answer: are the salts of hydrochloric acid HCl. The chloride ion forms when the element chlorine
picks up one electron to form the anion Cl− (a negatively-charged ion).
Question 11: Nitrates
Answer: Nitrates are salts of nitric acid with an ion composed of one nitrogen and three oxy- gen
atoms (NO−3).
Question 12: Soluble Salts
Answer: These are non-visible and require testing to determine their presence. Although they are
termed "soluble" they really are not very soluble at all.
Question 13: Sulfates
Answer: are the salts of sulfuric acid; the IUPAC-recommended spelling is sulfate; the British English
spelling is sulphate.
Question 14: Acidic Cleaners
Answer: Cleaners that remove soil by chemical attack; they dissolve the reaction products. They are
usually composed of fairly strong acids, such as phosphoric acid (H3PO4), with small quantities of
surfactants, water-miscible solvents, and organic wetting and emulsi- fying agents.
Question 15: Alkaline Cleaners
Answer: Cleaners that saponify most oils and greases, and their surface-active components wash away
other contaminants. These cleaners may also saponify certain coating vehicles.
Page 2
