Exam Question
Write short notes on:
(a) Free surface effects. (4)
(b) Cavitations (4)
(c) Reserve buoyancy. (4)
(d) Angle of Loll (4)
Class 4 (4th Engineer)
SC&S
📅 Dec 2022
Reference Answer
### (a) Free Surface Effect (FSE)
**1. Concept:**
The Free Surface Effect is the reduction in a vessel's transverse metacentric height (GM), and therefore its initial stability, caused by the movement of liquid in partially filled tanks or compartments as the vessel heels. This effect treats the liquid surface as if it were a solid mass rising, causing a virtual rise in the ship's center of gravity (G).
**2. Mechanism:**
**1. Concept:**
The Free Surface Effect is the reduction in a vessel's transverse metacentric height (GM), and therefore its initial stability, caused by the movement of liquid in partially filled tanks or compartments as the vessel heels. This effect treats the liquid surface as if it were a solid mass rising, causing a virtual rise in the ship's center of gravity (G).
**2. Mechanism:**
Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.
Prepare on Android — MeoMock on Google Play