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How is the process of steel corrosion always described? Electrochemical Based on the galvanic series presented in the nace cip level 1 manual, which three can be used effectively as galvanic anodes for carbon steel? Zinc, aluminum, magnesium A decrease in temperature will generally cause the corrosion rate to _____ Decrease The electrolyte is a medium which carries the following type of current? Ionic Corrosion occurring uniformly across a surface is called _____ General corrosion When a conflict occurs on a coatings project, as the inspector, the preferred first course of action is to _____ Actively listen and endeavor to understand the positions of others A proper coating specification should contain information regarding ____, ____, and ____ Surface preparation standards, safety, and locations to be used Is it ever okay to accept a gift from a contractor? No What should you do if you find discrepancies between the specification and the coating manufacturer's technical data sheet? Seek written clarification from the owner's representative
NACE CIP 1 CBT EXAM
(QUESTIONS AND VERIFIED
SOLUTIONS) LATEST UPDATE
What are the general components of inspection reports?
- results of inspection tests
- location(s) of work
- details of preparation and application Inspection reports typically provide sufficient detail permitting the owner to evaluate ___ ___ ___ ___
- contractor's performance
- inspector's performance
- job progress
- work interruptions As an inspector headed to the job site for the first time, where would you always find instruction regarding appropriate types of ppe? Safety data sheet (sds), previously called msds Materials inventory report should contain which of the following?
- quantity of each component of each material onsite
- material batch numbers
- date of materials arrival at job site and storage information The primary function of the coating inspector is _____ Specification compliance High humidity in the air during coating application can cause _____ Solvent entrapment The temperature at which moisture condenses on a surface is called _____ Dew point Where should the steel surface temperature reading be taken? At the actual work location What type of water should be added to a sling psychrometer? Distilled Which type of coating is manufactured with the specific components added to slow down the activity of the electrochemical cell?
Which type of coating cures the fastest? Polyurea When an inorganic zinc rich primer is applied too heavily a common result is
Mud cracking Commonly used primers for steel structures are?
- epoxy
- inorganic zinc
- organic zinc Coatings that cure by polymerization are _____ Convertible Water-borne latex coatings cure by a process known as _____ Coalescence On a blast-cleaned surface, ultraviolet ligt can reveal _____ Oil You are an inspector on a project with a sprayed polyurethane coating. The probable safety concern is _______ Isocyanates The requirements of a coatings project are defined by which document? Coating specification A prejob conference is useful for discussions on which of the following?
- safety
- cleaning
- application
- schedule You are the inspector on a project where the specified level of cleanliness is "near white". Which standard would you follow? Nace no. 2 / sspc-sp 10
The power tool standard for cleaning to bare metal with minimum profile of 1 mil (25.4 microns) is ______ Sspc-sp 11 What is referenced by iso 8503? Grit and shot profile comparators List the reasons that mill scale is typically removed:
- to avoid future delamination
- to improve coating adhesion
- to eliminate a source of galvanic corrosion Which standard defines a "commercially" blast cleaned surface? Nace no. 3 / sspc-sp 6 Iso sa 2-1/2 is a blast cleaning surface that is similar to which joint standard? Nace no. 2 / sp 10 Approximately 75% of premature coating features are caused by _____ Inadequate or improper surface preparation Nace sp0178 comparator addresses ___ ___ ___ ___
- butt welds
- lap welds
- radius edges
- finishing grades of weld You are on a project where testex tape is specified to determine surface profile by astm d4417 method c. What is likely to cause reading errors?
- dust on the surface
- using incorrect grade of tape Which power tool cleaning standard describes a surface free of all oil, grease, dirt, rust, coatings, mill scale, oxide and other foreign matter yet permits random staining while requiring a minimum profile of 25 microns (1 mil)? Sp 15 When applied to concrete, alkyd coatings will fail prematurely due to _____
- assist owners in the evaluation of inspector performance
- determine total cost of the project The inspector's log book is a personal chronicle of what happened on a daily basis and is usually ____ Retained by the inspector Generally speaking, on a typical coating project overall safety is the responsibility of _____ A certified safety professional When applying coatings, generally high relative humidity _____ Slows solvent evaporation A typical daily report should include ___ ___ ___
- description of manpower and equipment used
- explanation of work stoppages
- list of environmental conditions What is an advantage of airless spray compared to conventional air spray? Faster production rate What inspection challenges do you expect specific to working inside containment?
- illumination
- control of temperature and humidity Improper atomization of the coating may cause ___ ___ ___
- uneven dft
- dry spray
- overspray High viscosity due to low temperature should be corrected by ___ ___
- adding extra thinner
- heating the coating Sspc technology guide no.12 states "surface preparation and coating applications must have a minimum of how man candles / lumens?
50 foot candles (538 lumens) One major advantage of conventional spray is ___ Applicator control When using wft comb/gauge, the measurment should be taken when? Immediately after the coating is applied When reporting the wet film thickness from a wet film thickness comb/gauge you report which tooth? The last tooth that has coating on it Solventbourne inorganic zinc primer is being applied with airless spray to a complex bridge with difficult access for application. The contractor is having difficulty with high dft resulting in mudcracking. What application method might be a good alternative? Conventional spray An advantage of magnetic pull-off dft banana gauge is that it is ____ Intrinsically safe You must take a measurement with a dial-type magnetic pull-off dry film thickness gauge. What is the minimum recommended distance away from an edge that you can reliably take a measurement? 2.5 cm (1 inch) The testing procedure for water soluable ferrous salts is ____ Potassium ferricyannide test A well written specification requires a surface profile depth defined as ____ A range of measurements If there is a conflict between the project specification and manufacturer's product data sheet, which do you follow? Follow the specification What document should be reviewed prior to arriving to a job site to determine if amines or polyamides will be present? Safety data sheet (sds), formerly msds
You have been inspecting a tank repainting project and suspect that the surface was not cleaned properly, but coating has already been applied, what should you do? Consult the owner for guidance You are the inspector on a painting project prior to airless spray application. Which of the following airless spray safety items would you expect to see?
- tip guard
- connections wired/clipped
- gun safety Can a holiday detector be used for conductive coating on non-conductive surface? No According to nace sp0188, the wetted sponge is moved at a maximum rate of
1 linear foot per second (30 cm) Which standard would you reference if you notice blisters in a variety of shapes and sizes? Astm d When are nace international surface preparation standards considered binding? When specified in the contract documents You are preforming holiday testing on a pipe covered in dew. The reason you are receiving erroneous readings is ______ Telegraphing Which joint nace/sspc abrasive blasting standard states that "random staining shall be limited to no more than 33% of each unit area of surface"? Nace no. 3 / sspc-sp 6 commercial blast cleaning Which blasting standard allows for traces of tightly adherent mill scale, rust, and tightly adherent thin coatings up to 10%? Nace no. 8 / sspc-sp 14
According to nace no.4/sspc sp-7, mill scale, rust, and paint are considered adherent if they cannot be removed by _____ Lifting with a dull putty knife Iso 8501 st-3 is the standard for which of the following? Very thorough hand and/or power tool cleaning Which standard requires a "commercial grade" power tool cleanliness? Sp 15 Grounding the pump and fluid hose used in airless spray prevents ____ Static sparking Which standard is achieved if the steel has scattered tightly adherent rust remaining on less than 5% of the unit area? Nace no. 8 / sspc-sp 14 Fisheyes (cissing) often resemble crater-like breaks in the coating film that reveal tiny areas of substrate because of _______ Contamination such as grease, oil, or silicone Define corrosion Deterioration of a substance, usually a metal, or its properties because of a reaction with the environment What is passivation? The build up of an oxide on the surface of a metal to protect against further corrosion What are the elements of a corrosion cell?
- anode
- cathode
- electrolyte
- metallic pathway Describe what happens at the anode The metal dissolves into the electrolyte What is the function of the electrolyte?
- splash zone systems
- alteration of the environment How does nace define the inspector's role? The inspector's role is that of a quality control technician responsible for observing and reporting conformance or deviation from the project specification. What is the inspector's responsibility when it comes to safety on a project? Safety enforcement is not the responsibility of the inspector, however, it is his responsibility to report any issues that may affect the project Name some tests that may need to be conducted during surface preparation and coating operations. Temperature, rh, dp, anchor profile, surface cleanliness Name some of the documentation/reports that may be required to be maintained on a coatings project. Daily, weekly summary, materials usage report, manpower and equipment, non- conformance, conformance What are the most important characteristics of a good report? Objective, accurate, detailed What is the inspector's primary responsibility and what should the inspector not do as it pertains to the specification?
- enforce specification
- do not make changes What type of information should you expect to find on a product data sheet?
- surface prep and application info (i.e. Recommended surface cleanliness)
- recommended application methods and equipment (tip sizes)
- environmental parameters for application What type of information should you expect to find on a safety data sheet?
- health, safety and environmental
- ppe required
- physical characteristics
- emergency responder info Difference between qa and qc Qa: any systematic process of checking to see whether a product or service being developed is meeting specific requirements qc: a procedure or set of procedures intended to ensure that a manufactured product or service adheres to a defined set of quality criteria or meets the requirements of the client or customer Identify some of the defects that can be caused by incorrect application temperatures
- failure to cure
- too rapid solvent evaporation
- poor film formation Describe relative humidity The amount of moisture in the air compared to saturation level What is the dew point temperature? Temperature at which moisture will begin to form on a steel surface Name some of the effects wind may have on a coatings project
- blowing abrasives
- causing excessive drift or overspray
- accelerating solvent evaporation
- contributing to the formation of dry spray What are some of the common errors when using an electronic hygrometer? Failure to acclimate the instrument to the environment with adequate time Explain the process for use of the sling psychrometer
- make sure the wick is wet and clean
- continue to "sling" until 3 consecutive readings are achieved Desirable properties of a coating:
- chlorinated rubber
- vinyl List 4 convertible coating curing mechanisms:
- oxidation
- co-reaction (polymerization)
- hydration
- fusion List 3 characteristics of oxidation cure coatings:
- not suitable for immersion service
- not suitable for use over alkaline substrates
- limited dry film thickness per coat List coating types that cure by polymerization:
- epoxies
- polyurethanes
- polyureas
- polyasparatics
- polysiloxanies Define induction time: Time required by the product data sheet between mixing and applying the coating What is the main requirement for a hydrolysis coating to cure? Moisture Industrial and marine coatings are commonly referred to by: Generic resin type Oil based coatings applied over alkaline surfaces may result in: Saponification List five (5) of the formal sections usually contained in a good specification:
- scope of work
- terms and definitions
- reference standards and codes
- safety
- pre-job conference
- surface preparation
- coating materials (schedule)
- sampling coatings
- workmanship
- application
- work schedule
- repairs and remedial coating work
- inspection
- documentation What are two of the inpector's responsibilities as it relates to the specifications?
- enforce
- do not change During surface preparation, surface cleanliness should be inspected (as a minimum) the following three times:
- before any surface prep activities begin
- after surface prep, before coating begins
- between each application of coating in a multi-coat system Factors during surface preparation that may effect service life include:
- residues of oil, grease, and soil
- residues of (non-visible) chemical salts
- rust on the surface
- loose or broken mill scale
- rust scale
- anchor pattern
- defects mechanical cleaning equipment
- surface condensation
- sspc sp- 3
- sspc sp- 11 Examples of tools used for power tool cleaning:
- rotary wire brushes
- impact tools
- needle scaler
- rotary scalers
- piston scalers
- grinders and sanders
- disc sander Abrasive blasting methods:
- centrifugal blasting
- sand-injected water blast
- slurry blast
- wet abrasive blast
- dry grit blast cleaning (air blasting) Visual standards for abrasive blasting include:
- sspc-vis 1
- iso 8501- 1 Sspc sp 10/nace 2 limits staining to ___ per each unit area 5% Sspc sp 5/ nace 1 limits staining to _ per each unit area 0% Sspc-sp6/nace 3 limits staining to _______per each unit area 33% The two types of abrasive blasting nozzles include:
- straight
- venturi
The specified level of surface cleanliness must be achieved and maintained
Immediately prior to application of coating Advantages of centrifugal blast equipment include:
- dust and fines are contained
- abrasives are easily recycled
- blasting and priming can be an inline operation
- general overall economy
- no compressors, piping, or air handling equipment needed for wheel blasting The inspector checklist for surface preparation should include:
- ambient conditions
- conditions of the substrate
- pre-blast surface cleanliness
- shot/grit size selection
- shot/grit cleanliness
- abrasive blasting equipment
- surface profile
- surface cleanliness after blasting
- operator qualifications
- safety Abrasive media types include:
- shot & grit (metallic)
- crushed slag
- ceramic grit
- silica sand
- garnet
- agricultural abrasives
- specialty abrasives Abrasive media typically used for recycling include:
