AMPP Marine Coatings Inspector Specialty

Which international standard sets mandatory requirements for protective coatings in dedicated seawater ballast tanks of new ships?

• AIMO PSPC (MSC.215(82))
• BNACE SP0108
• CSSPC-PA 1
• DISO 12944-5

What is the minimum nominal dry film thickness (NDFT) required by IMO PSPC for coating of dedicated seawater ballast tanks?

• A320 micrometres (µm)
• B125 micrometres (µm)
• C200 micrometres (µm)
• D500 micrometres (µm)

Under the IMO PSPC 90/10 rule for ballast tank coating thickness measurements, which statement is correct?

• A90% of readings must be ≥ NDFT and the remaining 10% must be ≥ 0.9 × NDFT
• B90% of readings must be ≤ NDFT and 10% must exceed it
• C100% of readings must be ≥ NDFT with no exceptions
• D90% of readings can be any value if average ≥ NDFT

Which ISO 8501-1 surface preparation grade does IMO PSPC require for ballast tank steel after primary blasting?

• ASa 2½
• BSa 1
• CSa 2
• DSt 3

What surface profile range does IMO PSPC specify for ballast tank steel after abrasive blasting?

• A30 to 75 micrometres (µm)
• B10 to 25 µm
• C100 to 150 µm
• D200 to 300 µm

Which standard governs the assessment of dust quantity and size class on surfaces prepared for painting?

• AISO 8502-3
• BISO 8502-4
• CISO 8502-6 (Bresle method)
• DISO 8503-2

Per ISO 8502-4, what is the recommended minimum margin between steel surface temperature and dew point before coating application?

• A3 °C (5 °F) above the dew point
• BEqual to the dew point
• C1 °C below the dew point
• D10 °C below the air temperature

The Bresle patch test (ISO 8502-6) on marine steel measures which contaminant?

• ASurface-soluble salts (chlorides, sulfates)
• BDust
• COil and grease
• DMill scale

What is the maximum residual soluble salt level (as NaCl equivalent) recommended by IMO PSPC for ballast tank steel?

• A≤ 50 mg/m²
• B≤ 200 mg/m²
• C≤ 5 mg/m²
• DNo specific limit, manufacturer’s discretion

Which secondary surface preparation requirement does IMO PSPC impose on weld seams, edges, and surface contaminants?

• ASharp edges rounded to a minimum 2 mm radius (or 3-pass grinding), weld spatter removed
• BEdges may remain sharp if coating DFT is doubled
• CWelds need only be wire-brushed
• DOnly the first 100 mm from edges needs treatment

Which coating system is mandated by IMO PSPC for the topcoat of dedicated seawater ballast tanks?

• ALight-coloured epoxy
• BCoal tar epoxy
• CAlkyd enamel
• DSelf-polishing copolymer antifouling

Why does IMO PSPC require two stripe coats applied by brush or roller in ballast tanks?

• ATo ensure film build over edges, welds, scallops, and corners where spray coats thin out
• BTo save total coating material
• CTo increase gloss for inspection
• DTo replace abrasive blasting

Which document, required by IMO PSPC, must accompany every newbuild vessel and contain the coating specification, technical data sheets, inspector logs, and as-applied records?

• ACoating Technical File (CTF)
• BITP (Inspection and Test Plan) only
• CClass Society notation letter
• DMSDS binder

Under IMO PSPC, what is the minimum qualification for the coating inspector verifying ballast tank work on a newbuild?

• ANACE/AMPP CIP Level 2 (or equivalent FROSIO Inspector Level III)
• BWelding inspector qualification (CWI)
• CMarine surveyor with no coating credential
• DShipyard supervisor with 1 year experience

Which AMPP/NACE standard provides corrosion control guidance for offshore fixed steel structures?

• ANACE SP0108
• BNACE SP0492
• CNACE SP0188
• DNACE SP0178

On an offshore platform, which zone is generally considered the MOST aggressive corrosion environment?

• ASplash zone (between high tide and the design wave crest)
• BAtmospheric zone above the splash zone
• CFully submerged immersion zone with cathodic protection
• DBuried (mudline) zone

Which ISO 12944-2 corrosivity category corresponds to coastal and offshore areas with high salinity (marine atmospheric)?

• AC5-M (or simply C5 in the 2018 edition)
• BC2
• CC3
• DIm2

Which ISO 12944-2 immersion category applies to seawater immersion?

• AIm2
• BIm1
• CIm3
• DIm4

Antifouling coatings on ship hulls primarily prevent which problem?

• AMarine biofouling that increases hull friction and fuel consumption
• BGalvanic corrosion of the rudder
• CUV degradation of the topcoat
• DCathodic disbondment

Which type of antifouling releases biocide through controlled hydrolysis of the binder, exposing fresh biocide as the film polishes away?

• ASelf-polishing copolymer (SPC) antifouling
• BFoul-release silicone antifouling
• CInsoluble matrix (contact-leaching) antifouling
• DZinc-rich primer

Foul-release (silicone or fluoropolymer) antifouling coatings work by which mechanism?

• AProviding a low-surface-energy, slippery surface that prevents organisms from adhering
• BReleasing copper biocide continuously
• CKilling organisms with a high-pH alkaline surface
• DForming a hard ceramic shell

Tributyltin (TBT) self-polishing antifoulings were banned globally by which IMO convention?

• AAFS Convention (2001, in force 2008)
• BMARPOL Annex VI
• CBWM Convention
• DSOLAS Chapter II-1

An anti-corrosive primer used directly on blasted steel under antifouling on a steel hull is most commonly which type?

• AHigh-build epoxy (often aluminium-pigmented)
• BAlkyd primer
• CLatex primer
• DCellulose lacquer

A tiecoat between an epoxy anticorrosive and a silicone foul-release antifouling serves which primary function?

• AProvides adhesion between the chemically dissimilar epoxy and silicone layers
• BIncreases dry film thickness for buoyancy
• CActs as a sacrificial anode
• DReplaces the foul-release topcoat

Which method of cathodic protection on a ship's hull uses inert anodes powered by an external DC source?

• AImpressed current cathodic protection (ICCP)
• BSacrificial (galvanic) anode CP using zinc or aluminium
• CVapor-phase corrosion inhibitor (VCI)
• DWax coating

Sacrificial anodes on a steel ship hull or ballast tank are typically made of which alloy in seawater service?

• AAluminium-zinc-indium (Al-Zn-In) or pure zinc
• BCast iron
• CStainless steel 316L
• DTin-bronze

What is the typical protective potential criterion for steel in seawater referenced to a silver/silver-chloride (Ag/AgCl, seawater) electrode?

• AMore negative than −0.80 V
• BMore positive than −0.20 V
• CExactly 0 V
• DMore negative than −2.00 V

Cathodic disbondment of a coating around a holiday in a CP-protected immersed structure is caused primarily by:

• AHydroxide ion (OH⁻) generation and hydrogen evolution at the cathode under the film
• BChloride pitting on the coated surface
• CUV degradation
• DMicrobial colonisation

An immersion-service tank lining showing dense small blisters filled with clear liquid two months after commissioning is MOST consistent with:

• AOsmotic blistering driven by residual soluble salts under the film
• BAmine blush
• CUV chalking
• DMud-cracking from over-thick application

Why are edges, corners, and weld toes especially vulnerable in marine coating systems, motivating the use of edge-retentive coatings or stripe coats?

• ASurface tension causes liquid coating to shrink away from sharp edges, leaving very thin…
• BEdges are more chemically reactive than flats
• CEdges experience higher UV exposure
• DEdges have higher zinc content

Which standard governs the determination of dry film thickness on nonmagnetic coatings over ferrous substrates using electromagnetic induction or magnetic gauges?

• AISO 19840 (and SSPC-PA 2)
• BISO 8502-6
• CISO 4628-3
• DASTM B117

On rough blasted steel, ISO 19840 requires that DFT readings be corrected by subtracting a 'base metal reading offset' (BMR) that accounts for:

• AThe contribution of the surface roughness profile to the gauge reading
• BGalvanic potential of the substrate
• CCoating colour
• DOperator handedness

What does the holiday (pinhole) detection method on an immersion-service coating verify?

• AContinuity of the dielectric film — that there are no pinholes, voids, or thin spots to s…
• BDry film thickness uniformity
• CSurface profile
• DSoluble salt content

Which type of holiday detector is appropriate for thin coatings (typically <500 µm) on conductive substrates?

• ALow-voltage wet-sponge detector
• BHigh-voltage spark tester at 20 kV
• CX-ray fluorescence
• DSound-level meter

Per NACE/AMPP SP0188, what is the relationship between holiday-tester voltage and coating DFT for high-voltage spark testing?

• AVoltage is selected proportional to DFT (e.g., V = K × √(DFT)) up to a tabulated maximum
• BVoltage is always 1 kV regardless of DFT
• CVoltage must equal coating breakdown voltage
• DVoltage is irrelevant; only current matters

Which standard is used for pull-off adhesion testing on coated steel and is commonly cited for marine recoat acceptance?

• AASTM D4541 / ISO 4624
• BASTM B117
• CASTM D3359 (cross-cut)
• DASTM D523 (gloss)

Which ISO 8501-1 grade refers to 'blast cleaning to bare metal' — a clean white-metal appearance equivalent to SSPC-SP 5?

• ASa 3
• BSa 2½
• CSa 2
• DSa 1

Cargo oil tanks (COT) of crude oil tankers built on or after 1 January 2013 must have corrosion protection meeting which IMO regulation?

• APSPC-COT (MSC.288(87)) — Performance Standard for Protective Coatings of Cargo Oil Tanks…
• BMARPOL Annex II
• CIGC Code
• DSTCW

Which environmental factor most directly causes flash rusting of a freshly blasted ballast tank surface within hours?

• ASteel surface temperature below the dew point (condensation) or high relative humidity
• BCool morning sun on the deck
• CDiesel exhaust
• DFresh paint smell

Maximum relative humidity allowed during application of typical marine epoxy coatings per IMO PSPC is approximately:

• A85%
• B95%
• C60%
• D100%

Which instrument is used to estimate surface profile by pressing a deformable plastic foil onto a blasted surface and measuring the compressed thickness?

• AReplica tape (Testex-style), measured with a spring micrometer
• BTooke gauge
• CComparator block
• DHoliday detector

Which standard provides the visual rating scale (0 to 5) for the degree of rusting of painted surfaces, often referenced for in-service ballast tank coating condition?

• AISO 4628-3
• BISO 8501-1
• CASTM D4541
• DSSPC-PA 1

A 'GOOD' ballast tank coating condition under IACS UR Z10 (renamed for hull surveys) indicates which approximate level of breakdown?

• ASpot rusting only — minor breakdown well below 3% area
• BSubstantial breakdown >20% area
• CComplete coating failure
• DNo coating present

Why is light-coloured topcoat required by IMO PSPC for ballast tanks?

• ATo facilitate visual inspection during close-up surveys and improve lighting inside the t…
• BBecause dark colours emit toxic vapours
• CTo increase abrasion resistance
• DTo reduce coating cost

Which type of coating system is typically used as a lining inside cargo tanks of chemical tankers carrying aggressive acids and solvents?

• ASolvent-free novolac or phenolic epoxy
• BStandard amine-cured epoxy at 125 µm
• CAlkyd enamel
• DFoul-release silicone

Inorganic zinc-rich primer (IOZ) provides corrosion protection to steel primarily through:

• AGalvanic (sacrificial) protection — zinc corrodes preferentially to steel
• BBarrier protection by impermeable film
• CCathodic disbondment resistance
• DUV reflection