CHIEF ENGINEER Unit 7 Q2

Correct Answer:
B) The volume of enclosed space above the waterline that provides buoyancy if the vessel is partially submerged

Explanation:
Reserve buoyancy refers to the volume of the vessel above the waterline that remains watertight. This space provides additional buoyancy in case the vessel takes on water, helping it remain afloat.

Correct Answer:
B) Keeping tanks either full or empty to prevent liquid movement

Explanation:
Filling tanks fully or leaving them empty reduces the free surface effect, as it prevents the liquid from sloshing back and forth, which would otherwise reduce stability.

Correct Answer:
C) It allows the vessel to stay afloat if damaged or flooded

Explanation:
Reserve buoyancy is critical because it provides additional buoyant force, allowing the vessel to remain afloat if its hull or compartments are breached, enhancing safety during emergencies.

Correct Answer:
B) The effect of moving water in partially filled tanks or compartments, which reduces stability

Explanation:
The free surface effect occurs when liquids in partially filled tanks shift as the vessel moves, which can reduce stability by shifting the center of gravity.

Correct Answer:
B) Watertight compartments above the waterline

Explanation:
Watertight compartments above the waterline add reserve buoyancy by keeping the enclosed spaces intact and preventing water ingress, aiding in keeping the vessel afloat if it begins to submerge.

Correct Answer:
A) Regularly adjusting the vessel’s ballast tanks

Explanation:
By managing ballast tanks and keeping them either full or empty, the crew can minimize the free surface effect, improving vessel stability and safety.

Correct Answer:
B) It can cause unexpected loss of stability, leading to a risk of capsizing

Explanation:
The free surface effect can cause significant stability issues, especially in rough seas, as the liquid's movement shifts the vessel’s center of gravity, potentially leading to capsizing.