AB Ship Construction and Cargo 3

Question 1

What is meant by 'GM' in ship stability terminology?

Accepted Answer

The metacentric height — the distance between the center of gravity and the metacenter

Answer

GM (metacentric height) is the vertical distance between G (center of gravity) and M (metacenter), and it is the primary measure of initial stability.

Question 2

Which type of ship construction uses a series of transverse frames as the primary structural support?

Accepted Answer

Transverse framing system

Answer

The transverse framing system uses closely spaced transverse frames (ribs) as the primary structural members, common in older and smaller vessels.

Question 3

A 'tween deck' is BEST described as:

Accepted Answer

A deck located between two adjacent main cargo decks within a hold

Answer

A tween deck is an intermediate deck inside a cargo hold, dividing the hold into upper and lower compartments to allow separate cargo stowage.

Question 4

What is the primary purpose of double-bottom tanks?

Accepted Answer

To serve as ballast tanks and provide structural protection to the inner bottom

Answer

Double-bottom tanks serve as ballast tanks and add structural rigidity while providing a protective second bottom above the keel if the outer hull is breached.

Question 5

When cargo is described as 'broken stowage,' this refers to:

Accepted Answer

The wasted space that cannot be utilized due to the shape or packaging of the cargo

Answer

Broken stowage is the unused void space in a hold that results from irregularly shaped cargo or packaging that prevents a perfect fit.

(AB) Able Seaman Exam Practice Test

(AB) Able Seaman Exam Practice Test

AB Ship Construction and Cargo 3