CA Materials & Techniques 3 — Questions and Answers
Question 1: A claims adjuster is inspecting a property with 'galvanic corrosion' on copper pipes where they connect to galvanized steel fittings. What causes this?
- Chemical reaction from hard water mineral buildup
- Electrochemical reaction between two dissimilar metals (Correct answer)
- Bacterial growth inside the pipe system
- Excessive water pressure causing metal fatigue
Correct answer: Electrochemical reaction between two dissimilar metals
Galvanic corrosion occurs when two dissimilar metals are in electrical contact in the presence of an electrolyte (water), causing the less noble metal to corrode.
Question 2: What is 'oriented strand board' (OSB) and how does its performance differ from plywood in water damage claims?
- OSB is denser than plywood and resists water damage better
- OSB is engineered wood panels that swell and delaminate more severely when wet than plywood (Correct answer)
- OSB and plywood perform identically when wet
- OSB is a solid wood product that dries without structural loss
Correct answer: OSB is engineered wood panels that swell and delaminate more severely when wet than plywood
OSB is made from compressed wood strands and adhesive; it absorbs water at the edges and swells significantly, whereas plywood dries more uniformly and retains more structural integrity.
Question 3: During a fire damage inspection, an adjuster notes 'alligatoring' on painted wood surfaces. What does this pattern indicate?
- Extreme heat exposure causing paint to crack in a reptile-scale pattern (Correct answer)
- Normal aging of oil-based paint due to UV exposure
- Water infiltration beneath the paint film
- Chemical contamination from smoke residue
Correct answer: Extreme heat exposure causing paint to crack in a reptile-scale pattern
Alligatoring in fire-exposed areas indicates the paint experienced rapid extreme heat, creating a characteristic scaly cracking pattern used to estimate heat intensity.
Question 4: What is the function of 'weep holes' in brick veneer construction, and when would their absence be relevant in a water damage claim?
- They allow thermal expansion of the brick during temperature changes
- They allow water that enters the cavity to drain out and prevent moisture buildup behind the veneer (Correct answer)
- They provide ventilation to prevent mold growth in the wall cavity
- They reduce the weight load of the brick on the foundation
Correct answer: They allow water that enters the cavity to drain out and prevent moisture buildup behind the veneer
Weep holes are small openings at the base of brick veneer that allow any infiltrated water to drain out of the wall cavity; their absence can trap water and cause hidden moisture damage.
Question 5: A homeowner claims their EIFS (Exterior Insulation and Finish System) stucco exterior was damaged. What unique concern should an adjuster investigate?
- EIFS is prone to UV fading and requires full repainting after any damage
- EIFS can trap moisture behind the cladding causing hidden rot in the substrate (Correct answer)
- EIFS panels are structural and any damage compromises the building's integrity
- EIFS contains asbestos in pre-1980 installations requiring abatement
Correct answer: EIFS can trap moisture behind the cladding causing hidden rot in the substrate
Traditional EIFS without a drainage plane can trap water that penetrates through cracks, leading to hidden rot in the wood sheathing and framing behind it.
Question 6: In a residential plumbing claim, what distinguishes a 'polybutylene' pipe system and why is it significant for adjusters?
- Polybutylene is a lead-based pipe used before 1986 requiring mandatory replacement
- Polybutylene is a gray plastic pipe used 1978–1995 prone to failure from oxidizing agents in water (Correct answer)
- Polybutylene is a flexible copper alloy that corrodes faster than standard copper
- Polybutylene is a post-2000 PEX alternative with known freeze-crack defects
Correct answer: Polybutylene is a gray plastic pipe used 1978–1995 prone to failure from oxidizing agents in water
Polybutylene (PB) pipe, common from 1978–1995, reacts with chlorine and other oxidants in municipal water, degrading from the inside out and leading to sudden failures; its presence can affect insurability and claim outcomes.
Question 7: What is 'dead load' versus 'live load' in structural construction, and why must adjusters understand this distinction?
- Dead load is wind/seismic force; live load is the building's self-weight
- Dead load is permanent structural weight; live load is variable weight like occupants and snow (Correct answer)
- Dead load is applied during construction; live load is applied after occupancy
- Dead load is horizontal force; live load is vertical force on the structure
Correct answer: Dead load is permanent structural weight; live load is variable weight like occupants and snow
Dead load is the permanent static weight of the structure itself (framing, roofing, etc.), while live load is variable (people, furniture, snow); adjusters must understand this when evaluating structural damage from overload events like snow accumulation.
CA Materials & Techniques 3
A claims adjuster is inspecting a property with 'galvanic corrosion' on copper pipes where they connect to galvanized steel fittings.
What causes this?