Merchant Marine Stability and Trim License Questions

The effect of free surface on initial stability depends upon __________. A. the amount of liquid in the compartment B. the dimensions of the liquid surface and the vessel's displacement C. only the length of the compartment D. the vertical position of the liquid in the vessel

Which statement about free surface is TRUE? A. A partially filled space with 40% surface permeability will have greater free surface effect than one with 60% surface permeability. B. Pocketing increases the loss of GM due to free surface effect. C. Cargo with a specific gravity of 1.05 has less free surface effect than a cargo with a specific gravity of 0.98. D. Pocketing occurs at small angles of inclination when a tank is 98% full.

The volume of a vessel's intact watertight space above the waterline is its __________. A. free surface B. marginal stability C. reserve buoyancy D. freeboard

Which statement about the free surface effect is TRUE?     A. It increases in direct proportion to the length of the tank times the breadth squared.     B. It decreases at increased angles of heel due to pocketing when a tank is 90% full.     C. It decreases in direct proportion to increasing specific gravity of the liquid in the tank.     D. In practice, the correction is considered to be a virtual reduction of KG

On a vessel of 9,000 tons displacement there are two slack deep tanks of palm oil (SG .86). Each tank is 40 feet long and 30 feet wide.   What is the reduction in metacentric height due to free surface with the vessel in sea water (SG 1.025)? .   A.  0.27 ft   B.  0.48 ft   C.  0.57 ft   D.  0.74 ft

  What is the reduction in metacentric height due to free surface when a tank 60 feet long and 30 feet wide is  partially filled with salt water, and is fitted with a centerline bulkhead? (The vessel has a displacement of 10,000 tons.) A. 0.1 foot  B. 0.8 foot   C. 1.0 foot  D. 1.2 feet