Quiz 3A - Week 2

1. What does the coefficient of fineness of the waterplane area (CW) describe?

• • A measure of volume compared to hull shape

• • A ratio comparing waterplane area to a base rectangle

• • A relationship between beam and draught

• • A scale for measuring submerged length

2. Which of the following values has no physical unit?

• • Volume of displacement in cubic meters

• • Draught at the forward perpendicular

• • Coefficient of fineness of the waterplane area

• • Density of seawater in metric tons per cubic meter

3. The block coefficient (CB) compares:

• • The underwater hull area with freeboard

• • The volume of displacement to the volume of a block

• • The wetted surface to waterplane length

• • The beam to length at the waterline

4. What does the midship area coefficient (CM) represent?

• • The angle of heel during turning

• • The ratio of midship area to its surrounding rectangle

• • The proportion of beam above the waterline

• • The shape of the stern section

5. A ship with a high CM value has:

• • A wide and shallow rudder profile

• • A fuller shape at the midship section

• • A narrow stern and sharp bow

• • A higher length-to-beam ratio

6. The prismatic coefficient (CP) compares:

• • The block coefficient to waterline length

• • The displaced volume to a prism based on midship area

• • The wetted area to maximum breadth

• • The freeboard height to overall draft

7. Which inputs are used to calculate CP?

• • Draught and water density

• • Length and draft only

• • Midship area and waterline length

• • Displacement and center of gravity

8. A CW value of 1 means the waterplane:

• • Has a shape more circular than square

• • Is equal in area to its reference rectangle

• • Is smaller than its length-to-beam ratio

• • Has low density distribution

9. What does TPC represent?

• • The weight required to fill ballast tanks

• • The weight needed to change draught by one cm

• • The height between freeboard and keel

• • The resistance caused by hull shape

10. When draught increases, TPC:

• • Decreases with temperature

• • Increases due to larger waterplane area

• • Changes only with salinity

• • Drops due to reduced buoyancy