Nace2 Final문제 Speciallist Ccatings

Specialist Coatings

* Metallic coatings that are cathodic relative to their substrate provideprotection against corrosion through cathodic protection…?A T B F •

* Metals may be protected with a coating applied by hot-dipping intoaluminum…?A T • B F

* Fabricated structures that are to be hot dip galvanized may distort dueto the heat of the bath?A T • B F

The zinc galvanized layer formed on a substrate has the sameproperties regardless of the substrate properties…?A T B F •

* One ounce of zinc per square foot of surface area is equivalent to…?A 1.5mils(37 m)B 1.7mils(43 m) •C 1.9mils(49 m)D 2.1mils(55 m)

* Exess aluminum brightener in the zinc bath may be a cause of…?A Dross protrusionsB Rusti stainingC BlistersD Black spots •

* Dross protrusions cannot be easily removed from a cooled zinccoating…?A T • B F

* Flux staining may be only a surface effect and not hamful to the zinccoating…?A T B F •

* Rust stains on zinc galvanized surfaces…?A Are considered a serious defectB Are only caused by iron particles lying on the surfaceC Are generally caused by seepage from joins and seams •D Are not unusual, and never reported by inspectors

* Faying surfaces should not be zinc galvanized…?A T • B F

* Which of the following composite metals is frequently applied bythermal spray to achieve corrosion protection…?A 95% zinc + 5%aluminumB 85% zinc + 15%aluminum •C 75% zinc + 25%aluminumD 65% zinc + 35%aluminum

* Thermal spray coatings have been demonstrated to provide a servicelife greater than…?A 30 yearsB 40yearsC 50years •D 60 years

* Quality control of spray metallizing may require bend testing ofcoupons or components…?A T • B F

* When bend tests are performed,which of the folloing is considered tobe a failure…?A Minor crackingB DiscolorationC Cracking seen without magnificationD Delamination • +major crack

* Porosity of thermal sprayed metal coatings is most likely to be…?A <3%B 10-12% • 3~18C 20-25%D >30%

* Ablative anti-fouling coatings reduce their thickness in service…?A T • B F

* Selection of antifouling depends on anticipated service conditions…?A T • B F

* Which of the following is not a reason to use passive fireproofingsystem…?

A Enforcement of fire safety codesB Requirements for personnel protectionC Protection of assetsD Corrosion prevention •

* Fully stressed steel structures lose their design integrity whentemperature exwwds…?A 500 C (930 F)B 550 C (1020F) •C 600 C (1112 F)D 650 C (1200 F)

* Which of the following terms describes a wood fire…?A HydrocarbonB FibrousC Cellulosic •D Jet fire

* Cementitious fireproofing materials generally require installation of asupportive mesh…?A T • B F

* Lightweight Cementitious fireproofing materials are less likely to spallin hydrocarbon fire?A T • B FSubliming fireproofing materials release gases during a fire…?A T • B FIntumescent fireproof coatings are generally two componentmaterials…?A T B F •

Which of the following is most likely to be used as a compositefireproofing material…?A Pressed asbestos between aluminum sheetsB Ceramic fiber in multiple layersC Cementitious board with mineral wool between •D Stainless cladding sheets with expanded foam between

* Expanded form materials may be used to provide thermalinsulation…?A T • soundproofing, Filling joint at girthweld

* Which of the following is not a resin commonly used for brick mortar orgrout…?A FuranB PhenolicC Acrylic •D Vinyl ester

* Corrosion resistant mortar is made by modifying cement withaddtivies…?A T • B F

* WHICH OF THE FOLLOWING IS NOT A RESIN COMMONLY USEDTO MAKE POLYMER CONCRETE…?A FuranB Polyester, Vinyl esterC Zinc silicate •D Novalac resin, Potassium silicate

* Which of the following is not a form of grass fiber commonly used tomake FRPproducts…?A Chopped grassB Woven grass rovingC Kevlar E Flake glassD PVC •

* Vulcanizing rubber often takes place in an autoclave…?A T • B F

* Which of the following is not a common cause of failure for rubberlinings…?A Incorrect grade product for serviceB Inadequate gel coat •C Use of rubber product after shelf-life has expiredD Inadequate cure

* Glass lining are generally applied over a compatible membrane…?A T B F •

* Vessels that are to be glass lined are first stress relieved athigh temperature…?A T • B F

* Surface preparation for the glass lining process is not critical providedthere in no chemical contamination such as soluble salts…?A T B F •

* Zinc phosphate application baths are generally maintained at atemperature in the range…?A 50 C(122F)B 60 C(140F)C 70 C(158F)D 80 C(175F) •

* DFT OF DEPOSITED PHOSPHATE LAYER CAN BE EASILY MEASUREDWITH MAGNETIC DFT GAUGES…?A T B F •

* Anodized finishes are often dyed to create color…?A T • B F

* Film thickness of anodized is generally..?A angstromsB <0.1 mil(2.5m)C 0.1~3.0mil(2.5~75m) •D 3.0~4.0mil(75~100m)

* Soluble chromates are effective inhibitors…?A T • B F

* Cathodic protestion using metallic coatings is most often achieved bydipping the substrate into ?A hot (molten)zinc •B hot (molten)magnesiumC hot (molten)aluminum D cold zinc dispersion

* Sheet steel may be hot-dip galvanized by …?A Hot-dipping into proprietary zinc-rich paint solutionB spray application of hot zincC fusion of hot zinc sheet to the base metalD continuosly galvanized in strip form •

* Hot-dipped zinc coatings are sometimes annealed to convert the whole

of the coating into an alloy…?A T • B F

* traditionally , prices for zinc garvanized coating are based on …?A Surface area of structureB coating weight •C coating thicknessD coating appearance

* small bare spots in a galvanized coating may be protected by theanodic effects of the zinc…?A T • B F

* rough galvanized coating surfaces caused by high zinc thickness arenot likely to reduce the protection provided by that coating…?A T • B F

* flux inclusion attract moisture,and can be identified by repid formationof white rust…?A T • B F

* Flux stains on the zinc surface may be removed by waterwashing … ?A T • B F

* white rust is only found on aluminum surfaces….?A T B F •

* corrosion forming on zinc galvanized surfaces is often called…?A Zinc oxide • Zinc carbonateB zinc rustC white rustD zinc chromate

* Non-skid coatings may be created using a mix of aluminum andaluminum oxide…?A T • B F

* When thermal spray coatings are applied, surface pre-heating mayimprove coating adhesion…?A T • B F

* thermal sprayed metal coatings have poor resistance to mechanicalimpact…?A T B F •

* Sweep blasting to remove spent anti-foulings is equivalent to …?A NACE #3B NACE #4C SSPC SP-7D None of the above •

* selection of antifoulings depends on anticipated service conditions…?A T • B F

* Fire risk assessments are always performed by government sponsoredlaboratoriesA T B F •

* level of fire protection are generally specified by reference to both timeand temperature ..?A T • B F

* Critical temperature for structure which is the subject of fireproofingdesign may be specified as part of the design…?A T t B F

* which of the following is not a class of passive fireproofing material…?A CementitiousB sublimingC intumescentD resinous •

* Cementitous fireproofing materials may be applied by the gunitetechniqueA T • B F

* Lightweght cementitious materials are less likely to spall inhydrocarbon fires…?A T • B F

* which of the following may be used as a fibrous fireproofing material…?A mineral wool •B fiberglass

C treated cottonD PVC knitted cloth

* Fibrous foreproofing materials may absorb water easily..?A T • B F

* during application ,lightweight cementitous products may crack inhot,dry conditions…?A T • B F

*Most lightweight cementitious fireproofing materials requirereinforcement with mesh or cloth…?A T • B F

* Intumescent mastics are often applied with conventional spraytechniques…?A T B F •

* Which of the following is not an insulating material recognized by NACERP0198 A Calcuim hydroxide •B expaned perliteC cellural glassD organic foam

* Expanded foam formulations may include isocyanates…?A T • (formaldehyde, nitrosamine) B F

* When tiles are laid for a protective lining, they are generally placedon…?A flat concreteB resin setting bed •C rybber sheet liningD blast-cleaned seel

* Corrosion resistant mortar is made by modifying cement withadditives…?A T • B F

* The top coat in FRP tank liling systems is kwon as…?A Fill coat B Final coat

C Gel coat •D Seal coat

* Commen curing temperrture linings in an autoclave are …?A 200-212 F(94 - 100 C)B 250-300 F(125 - 150 C) •C 400-450 F(205 - 235 C)D 500-550 F(260 - 290 C)

* which of the followings is not a defect that may be seen in curedrubber tank lininins…?A PinholesB blistersC runs&sags •D loose lap seams

* Typical firing temperature to create a glass lining is approximately…?A 500 F(260 C)B 800 F(425 C)C 1200 F(650 C)D 1500 F(815 C) •

* Un-bonded linings are generally fabricated specifically to fitthe size and shape of vessel in which they’ll be used … ?A T • B F

* which of the allowing would not be considered a temporary protectivecoating…?A Preservative oilB Rust converterC Zinc silicate pre-fabrication primer •D vaper-phase inhibitor

* temporary protective coatings may be left in place untilremoved by commissioning or start-up procedures…?A T • B F

* Zinc phosphate application baths are generally maintained at atemperature in the range…?A 50 C (122 F)B 60 C (140 F)C 70 C (158 F)

D 80 C (175 F) •

* Fluxing is an essential part of the hot-dip galvanizing process…?A T • B F

* After surface preparation, surface to be hot-dip galvanized must betreated with chemicals prior to dipping…?A T • B F

* sheet steel may be hot-dip galvanized by dipping each individual sheetinto a zinc bath…?A T • B F

* Immediately after galvanizing , which of the following is the most likelyaction..?A Water quench •B acid sprayC sample collection for zinc analisisD chromate treatment

* Service life of zinc galvanized coatings is directly related to coatingthickness…?A T • B F

* Coating thickness of zinc galvanizing on chain link fencing may beestimated by calculations based on stripping zinc in the…?A Durometer testB vincent testC norton testD priece test •

* Adhesion tests may be performed on zinc galvanized coatings forquality control…?A T • B F

* Which of the following is not a common surface defect that may beencountered by inspectors of zinc galvanized surfaces …? A Ash inclusionsB Bare spotsC Wrinkling •D Rust stains

* white rusts is only found on aluminum surfaces…?A T B F •

*Acoording to some common standards, general surface roughness ofzinc galvanizing is often acceptable…?A T • B F

* when coatings are applied over zinc galvanizing, a surface profilegenerally must be achieved…?A T • B F

* When thermal spray coatings are applied, surface pre-heating is mostoften used with…?A Gas flame spray •B electric arc sprayC gas plasma sprayD disc distribution

* thermal sprayed metal coatings are suitable for immerson service…?A T • B F

* DFT of sprayed metal coatings can be measured using magnetic DFTgauges…?A T • B F

* Porosity of thermal sprayed metal coatings can be easily measured…?A T B F •

* anti-fouling coatings have a limited life , and need to be replaced atregular intervals..?A T • B F

* Typical expected service life of regular anti-fouling coatings is…?A < 1 yearsB 2-3 years •C 5-8 yearsD >10years

* Which of the following is not a reason to use passive fireproofingsystems…? A Enforcement of fire safety codesB requirements for personnel protection

C protection of assetsD corrosion prevention •

*Levels of fire protection are generally specified by reference to bothtime and temperature..?A T • B F

* Which of the following is not a standard appropriate for fire protectionsystems…?A ASTM E-119B DIN 4102C ASTM G-8 •D UL-1709

Cementitious foreproof materials may fail by spalling ..?A T • B F

* adequate fire protection can be archieved with lightweightcementitious fireproofing using only one inch (25 mm) thickness …?A T • B F

* Intumescence is a process in which fireproofing coatings change bycreating an expaned form..?A T • B F

* Which of the following may be used as a fibrous fireproofingmaterial…?A Mineral wool •B fiberglassC treated cottonD PVC knitted cloth

* Fixing pins for wire mesh reinforcement of cementitious fireproofingmaterials should be tested after welding to the substrate…?A T • B F

* When lightweight cementitious fireproofing materials are applied , awater meter is required…?A T • B F

* Which of the following is not a common reason to use insulationmaterials…?

A Maintenance of temperature within process liquidsB reduction of noise levelsC protection of personnel from hot surfacesD corrosion prevention •

* which of the following is most likely to be used as a resin inmortar or grout for brick of tile linings…?A AlkydB acrylicC polyurethaneD epoxy •

* Brick or tile linings are often used in conjunction with secondarycontainment…?A T • B F

* Machinery setting grouts are used to level mounts formachines…?A T • B F

* Which of the following is not a type of synthetic rubber..?A Butyl rubberB neopreneC nitrile rubberD ethyl rubber •

* When unbonded linings are used in a vessel surface preparation shouldrequire removal all spakes, protrusions and sharp edges…?A T • B F

* Rust converters are often based on muriatic acid…?A T B F •

* Phosphate coatings are most often achieved by spraying the structureor component with phosphoric acid…?A T B F •

* Anodizing is created by electrolytic action…?A T • B F

* anodized finishes are often dyed to create color…?A T • B F

아래 문제 True