PCS PCS Coating Systems and Specifications 2

Question 1

A coating specification requires a 'holiday-free' lining. Which test method is used to detect pinholes and voids in an immersion-service lining?

Accepted Answer

High-voltage spark testing

Answer

High-voltage spark (holiday) testing uses an electrical current to locate discontinuities in immersion-service linings where pinholes would allow corrosive media to reach the substrate.

Question 2

Which resin type is generally preferred when a coating specification calls for chemical resistance to hydrocarbon solvents?

Accepted Answer

Epoxy

Answer

Epoxy coatings offer superior chemical and solvent resistance due to their highly cross-linked structure, making them the preferred choice for hydrocarbon environments.

Question 3

What does 'pot life' mean in a coating specification for a two-component product?

Accepted Answer

Time the mixed coating remains usable after mixing

Answer

Pot life is the period during which a mixed two-component coating maintains its workable viscosity and can be applied before cross-linking renders it unusable.

Question 4

When a specification states 'theoretical spreading rate of 320 sq ft/gal at 5 mils DFT,' what adjustment must a contractor make in practice?

Accepted Answer

Apply a loss factor for overspray, runs, and waste

Answer

Theoretical spreading rates must be adjusted by a realistic application efficiency or loss factor (typically 20–30%) to account for overspray, material waste, and surface irregularities.

Question 5

Which standard provides minimum requirements for protective coating specifications on steel structures?

Accepted Answer

SSPC-CS 23.00

Answer

SSPC-CS 23.00 provides minimum requirements for the content and format of protective coating specifications for steel structures.

PCS - Protective Coatings Specialist Certification Practice Test

PCS - Protective Coatings Specialist Certification Practice Test

PCS PCS Coating Systems and Specifications 2