468 DPKP 15. Control trim, stability and stress (Pengendalian trim, stabilitas dan tegangan () 1. For a container stowed in a position equidistant from the roll and pitch axes of a ship, what will quarter the acceleration forces acting on it? A. Doubling the roll period B. Doubling the pitch period C. Halving the roll period D. Halving the pitch period 2. How are ship's stability characteristics affected by Parametric Rolling? A. By the constant change of underwater hull geometry as waves travel past the ship B. By the virtual loss of GM C. By the development of a negative GM D. By an increase in the angle of pitch 3. What does heaving result in? A. Vertical accelerations acting along container corner posts B. Shearing of container twistlocks C. Longitudinal accelerations acting on hatch pontoons D. Tipping of containers 4. What is the disadvantage of using High Tensile Steel (HTS) in ship construction? A. Enhanced vibration in HTS areas B. Failure without warning C. Low elasticity D. Diminished cargo carrying capacity 5. What is the primary cause of fatigue damage to the hull girder? A. The number of repeated stress cycles B. Repeated plastic deformation of the hull C. Panting stresses D. Resonant rolling