Oral question bank for class IV examinations. FUNCTION: Ship construction and stability. 1. What do you understand by the term Deep tank construction and. draw the diagrams for the same. 2. Explain. the terms Garboard strake, sheer strake and what role. What is dynamic stability? A vessels ability to absorb the excess energy caused by external forces. Is the excess heeling energy on the right or left of graph? When the hull is ruptured, water rushes in and out as the ship rolls decreasing its stability. What do transverse watertight bulkheads do? prevent flooding. What is progressive flooding? The forces acting on a ship may be static or dynamic. The static forces are due to the difference in the weight and buoyancy, which occur through out the ship. The dynamic forces are cause by the motion of the ship at sea and the action of the wind and wave. These forces create: Longitudinal stress. Transverse stress. The ship is also subjected to transverse racking stresses when rolling in a seaway, the tendency of which is to cause distortion at the corners of the box-shaped girder. A simple transverse section consists of a "frame', or rib, extending the whole girth of the ship, the top ends being held firmly in position by means of a transverse beam. The stability condition of a ship depends on the stability torque and this depends on the positions of the center of gravity and center of the hull. The equilibrium conditions are: 8. 1.STABLE EQUILIBRIUM OR POSITIVE STABILITY: When it is a ship, a cause of a force on the outside, M is located above G, the arm of the power generator is on the Various operations at sea, such as maintaining a constant ship position and direction, require a complex control system. Under such conditions, the ship needs an efficient positioning technique. Dynamic positioning (DP) systems provide such an application with a combination of the actuators mechanism, analyses of crucial ship variables, and environmental conditions. The natural forces of jI3Q3EK.

what is dynamic stability of ship