SAMS Hull and Machinery Surveyors 2

Question 1

When inspecting a vessel's keel bolts, which condition most strongly indicates electrolytic corrosion rather than simple galvanic corrosion?

Accepted Answer

Preferential wastage on bolts nearest the bilge pump discharge

Answer

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.

Question 2

Under ABYC standards, what is the minimum thickness of fiberglass laminate generally required at the chainplate attachment area of a sailing vessel?

Accepted Answer

No specific multiplier; engineer's calculation governs

Answer

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.

Question 3

A marine surveyor detects osmotic blistering on a GRP hull. Which test provides the most definitive quantification of moisture intrusion in the laminate?

Accepted Answer

Core sample gravimetric moisture content analysis

Answer

Gravimetric analysis of core samples measures actual water weight gain in the laminate, providing quantitative data that surface moisture meters cannot match in accuracy.

Question 4

Which structural element connects the deck to the hull shell and is critical for resisting racking forces in a monohull sailboat?

Accepted Answer

Hull-to-deck joint

Answer

The hull-to-deck joint transfers lateral racking loads between the topsides and deck structure, making its integrity essential to overall hull stiffness.

Question 5

When assessing a diesel engine's crankshaft deflection readings, what does an increasing deflection spread from forward to aft bearings typically indicate?

Accepted Answer

Engine foundation hogging or hull distortion

Answer

A progressive deflection trend along the crankshaft axis suggests the engine foundation or hull girder has distorted, causing misalignment between bearing saddles.

(SAMS) Society of Accredited Marine Surveyors Certified Practice Test

(SAMS) Society of Accredited Marine Surveyors Certified Practice Test

SAMS Hull and Machinery Surveyors 2