Quiz 4A - Week 2

What does TPC represent in ship hydrostatics?

• Tons per centimeter immersion
  

• Total pressure constant
  

• Total propulsion capacity
  

• Trim position coefficient

What does TPC help determine?

• The draught change after loading or unloading
  

• Ship engine power
  

• Wind resistance
  

• Ballast tank volume

Which factor affects TPC the most?

• Waterplane area and density
  

• Ship speed
  

• Fuel weight
  

• Air pressure

How is TPC calculated?

• Waterplane area × density ÷ 100
  

• Density ÷ waterplane area
  

• Displacement × draught
  

• Weight ÷ displacement

A larger waterplane area results in:

• A higher TPC
  

• A lower TPC
  

• No change in TPC
  

• Zero draught

In fresh water, TPC is generally:

• Lower than in salt water
  

• Equal to salt water
  

• Higher than salt water
  

• Zero

Which density gives the highest TPC for the same draught?

• Salt water
  

• Fresh water
  

• Dock water
  

• Rain water

If a ship is floating at the same draught in fresh and salt water:

• The salt water displacement is greater
  

• Both displacements are equal
  

• Fresh water displacement is more
  

• Draught is irrelevant

To change the draught by 2 cm, you must:

• Load 2 × TPC
  

• Subtract TPC from weight
  

• Divide TPC by 2
  

• Load TPC once

If a ship’s TPC is 50, what does this mean?

• Each 1 cm change in draught equals 50 tons
  

• The ship can carry 50 tons in total
  

• The waterplane area is 50 m²
  

• 50 cm equals 1 ton of cargo