Revision Lesson 1 and 2 (Ship Stabilty)

What is the formula for density?

• density = mass x volume

• density = mass / volume

• density = mass + volume

Why do some substances float on water?

• they are warmer than water

• they are cooler than water

• they are denser than water

• they are less dense than water

If weight is added to the vessel, she will sink until the total weight of water displaced is the same as the new total weight of the vessel.

• True

• False

11. Deadweight of a ship is the difference between:

• 11. Light displacement and load displacement

• 11. Load displacement and light displacement

• 11. Displacement and weight of cargo

• 11. Gross tonnage and net tonnage

The displacement of a ship refers to:

• The Volume of it displaces while floating

  Symbol: m3
  

• The mass of water it displaces while floating

  Symbol: Δ (delta)

• The mass of Cargo

  Symbol: tonnes

Block Coefficient [Cb] is the ratio between the actual underwater volume to the volume of a cuboid having the same length, breadth, and draught.

• True

• False

TPC is the number of tons required to change the draft by a one-centimeter cube.

• True

• False

For a box-shaped vessel the TPC will be the same at successive drafts and changes with the density of water where the ship is floating.

• True

• False

A ship going from seawater to freshwater will experience an increase in the draft.

• True

• False

When a ship is loading down to her marks in freshwater, she can immerse her loadline by the FWA of the ship so that when she goes to saltwater, she would rise to her appropriate loadline.

• True

• False