SS Quiz Topic 2

What is the Coefficient of Fineness of waterplane area (Cw)?

• Ratio between actual water plane area and a rectangle

• Ratio between actual underwater volume and a cuboid

• Number of tons required to change the draft by one centimeter

• Amount by which a ship's draft changes when moving from salt water to fresh water

What is the formula for Fresh Water Allowance (FWA)?

• FWA = W / 4 TPC

• FWA = W + 4 TPC

• FWA = W x 4 TPC

• FWA = W - 4 TPC

What is the Dock Water Allowance (DWA)?

• Amount by which a ship's draft changes when moving from salt water to fresh water

• Amount by which a ship's draft changes when moving from salt water to any water other than fresh water

• Number of tons required to change the draft by one centimeter

• Ratio between actual underwater volume and a cuboid

What is the Tons Per Centimetre (TPC)?

• Ratio between actual underwater volume and a cuboid

• Amount by which a ship's draft changes when moving from salt water to fresh water

• Number of tons required to change the draft by one centimeter

• Ratio between actual water plane area and a rectangle

What is the effect of change of density on draft when the displacement is constant?

• New mass of water displaced = Old density

• New mass of water displaced = Old mass of water displaced

• New volume = Old density

• New volume = new density

What is the Coefficient of fineness of displacement or Block Coefficient (Cb)?

• Ratio between actual water plane area and a rectangle

• Number of tons required to change the draft by one centimeter

• Ratio between actual underwater volume and a cuboid

• Amount by which a ship's draft changes when moving from salt water to fresh water

What is the Fresh Water Allowance (FWA)?

• Amount by which a ship's draft changes when moving from salt water to fresh water

• Amount by which a ship's draft changes when moving from salt water to any water other than fresh water

• Number of tons required to change the draft by one centimeter

• Ratio between actual underwater volume and a cuboid

What is the formula for Dock Water Allowance (DWA)?

• DWA = FWA + 0.025

• DWA = FWA / 0.025

• DWA = FWA x 0.025

• DWA = FWA [Change in RD] / 0.025

What is the Waterplane Coefficient (Cw)?

• Amount by which a ship's draft changes when moving from salt water to fresh water

• Ratio between actual underwater volume and a cuboid

• Ratio between actual water plane area and a rectangle

• Number of tons required to change the draft by one centimeter

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