Quiz 6A - Week 3

1. What does point G represent in a ship?

• • Geographical position

• • Gravity axis

• • Center of gravity

• • Center of pressure

2. What does point B represent in a ship?

• • Base point of the hull

• • Buoyancy limit

• • Center of buoyancy

• • Ballast center

3. The center of gravity (G) is the point where:

• • The buoyant force acts upward

• • The total weight of the ship acts downward

• • The ship’s propulsion begins

• • The keel structure is weakest

4. The center of buoyancy (B) is the point where:

• • Total resistance acts

• • Hydrostatic pressure is greatest

• • Buoyancy force acts vertically upwards

• • Stability is neutralized

5. When a ship heels, which of the following is most affected?

• • Distance between keel and mast

• • Relative positions of G and B

• • Longitudinal stress

• • RPM of engine

6. The force of gravity (Wf) always acts:

• • Horizontally outward

• • Along the ship’s axis

• • Vertically downward

• • Through the rudder

7. The buoyancy force (Bf) acts:

• • Vertically upward through B

• • Along the keel

• • From stern to bow

• • Tangentially to the hull

8. Which factor does not influence the movement of point G?

• • Shifting weights

• • Loading weights

• • Discharging weights

• • Sea temperature

9. If external heeling force is removed, what ideally happens to the ship?

• • Capsizes

• • List permanently

• • Returns to upright

• • Keeps tilting

10. What concept explains the restorative action of a ship after heeling?

• • Dynamic trim

• • Freeboard stress

• • Transverse metacenter

• • Ship stability