Hull and Machinery Surveyors Flashcards
7 cards from real SAMS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Hull and Machinery Surveyors flashcards as text
When inspecting a vessel's keel bolts, which condition most strongly indicates electrolytic corrosion rather than simple galvanic corrosion?
Answer: Preferential wastage on bolts nearest the bilge pump discharge
Stray current electrolytic corrosion tends to concentrate near electrical discharge points such as bilge pump outlets, unlike galvanic corrosion which follows dissimilar metal contact zones.
Under ABYC standards, what is the minimum thickness of fiberglass laminate generally required at the chainplate attachment area of a sailing vessel?
Answer: No specific multiplier; engineer's calculation governs
ABYC standards do not specify a fixed multiplier; chainplate backing must be engineered to distribute the load without failure, typically verified by calculation or load testing.
A marine surveyor detects osmotic blistering on a GRP hull. Which test provides the most definitive quantification of moisture intrusion in the laminate?
Answer: Core sample gravimetric moisture content analysis
Gravimetric analysis of core samples measures actual water weight gain in the laminate, providing quantitative data that surface moisture meters cannot match in accuracy.
Which structural element connects the deck to the hull shell and is critical for resisting racking forces in a monohull sailboat?
Answer: Hull-to-deck joint
The hull-to-deck joint transfers lateral racking loads between the topsides and deck structure, making its integrity essential to overall hull stiffness.
When assessing a diesel engine's crankshaft deflection readings, what does an increasing deflection spread from forward to aft bearings typically indicate?
Answer: Engine foundation hogging or hull distortion
A progressive deflection trend along the crankshaft axis suggests the engine foundation or hull girder has distorted, causing misalignment between bearing saddles.
During a haul-out survey, a surveyor observes that antifouling paint has worn through to bare gelcoat on the keel-to-hull fillet only. What is the primary concern?
Answer: Crevice corrosion initiation in a high-stress laminate joint
The keel-to-hull fillet is a high-stress area subject to flexing; bare substrate in this zone is vulnerable to crevice corrosion (on metal keels) or moisture ingress into a stressed laminate joint.
Which SAMS guideline requires a marine surveyor to disclose a material relationship with a vessel being surveyed?
Answer: SAMS Ethics Canon 3 — Conflict of Interest disclosure
SAMS Ethics Canon 3 mandates that surveyors disclose any financial, personal, or professional relationship that could compromise impartiality when surveying a vessel.