AB Ship Construction and Cargo 2

Question 1

What is the purpose of a ship's cofferdam?

Accepted Answer

To separate two adjacent tanks and prevent leakage between them

Answer

A cofferdam is a void space between two adjacent tanks that prevents liquid from one tank leaking into the other.

Question 2

Which structural member runs longitudinally along the bottom centerline of a ship and is considered its backbone?

Accepted Answer

Center keel

Answer

The center keel (or simply keel) is the primary longitudinal structural member running along the bottom centerline, forming the ship's backbone.

Question 3

What term describes the cargo space below the main deck that is NOT a hold?

Accepted Answer

Deep tank

Answer

Deep tanks are enclosed spaces in the lower part of the ship used for liquid cargo or ballast, distinct from dry cargo holds.

Question 4

The 'sheer' of a vessel refers to:

Accepted Answer

The upward curve of the deck from amidships toward the bow and stern

Answer

Sheer is the longitudinal curvature of the main deck, rising toward the bow and stern from the lowest point amidships.

Question 5

Which type of cargo requires the most ventilation during stowage to prevent moisture damage?

Accepted Answer

Hygroscopic dry cargo such as grain or coffee

Answer

Hygroscopic cargo absorbs moisture from the air, so adequate ventilation is critical to prevent condensation and cargo sweat damage.

(AB) Able Seaman Exam Practice Test