NACE CIP 1 2027 UPDATE WITH COMPLETE SOLUTIONS
Question 1.
High-Voltage AC Holiday Detector
Correct 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
Correct 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
Correct 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
Correct 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)
Correct 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)
Correct 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)
Correct Answer: instruments are electronic gauges. They use electronic circuitry
to convert a reference signal into coating thickness.
Question 8.
Wet Film Comb
Correct 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 9.
Chlorides
Correct 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 10.
Nitrates
Correct Answer: Nitrates are salts of nitric acid with an ion composed of one
nitrogen and three oxygen atoms (NO−3).
Question 11.
Soluble Salts
Correct 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 12.
Sulfates
Correct Answer: are the salts of sulfuric acid; the IUPAC-recommended spelling
is sulfate; the British English spelling is sulphate.
Question 13.
Acidic Cleaners
Correct 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 1.
High-Voltage AC Holiday Detector
Correct 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
Correct 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
Correct 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
Correct 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)
Correct 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)
Correct 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)
Correct Answer: instruments are electronic gauges. They use electronic circuitry
to convert a reference signal into coating thickness.
Question 8.
Wet Film Comb
Correct 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 9.
Chlorides
Correct 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 10.
Nitrates
Correct Answer: Nitrates are salts of nitric acid with an ion composed of one
nitrogen and three oxygen atoms (NO−3).
Question 11.
Soluble Salts
Correct 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 12.
Sulfates
Correct Answer: are the salts of sulfuric acid; the IUPAC-recommended spelling
is sulfate; the British English spelling is sulphate.
Question 13.
Acidic Cleaners
Correct 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.
