Where must the metacentre be positioned relative to the center of gravity for a floating body to achieve stable equilibrium_________________ ?
Show answer Hide answer
Answer: E. above the center of gravity
Explanation
For stable equilibrium, a floating body's metacentre must be positioned above its center of gravity. This vertical arrangement creates a restoring righting moment when the body is tilted. A restoring moment forces the floating structure to return to its upright equilibrium position. The metacentre is the theoretical point where the line of action of buoyancy force intersects centerline. Center of gravity represents the average location of the total mass of the floating object. Center of buoyancy acts through the centroid of the submerged displaced liquid volume.
Naval architects calculate metacentric height carefully to ensure cruise ships remain stable at sea. Insufficient metacentric height can cause vessels to capsize easily during severe storm conditions. Cargo loading protocols prevent ships from becoming unstable by keeping centers of gravity low. Placing the metacentre below the center of gravity creates an overturning moment, causing capsizing. Center of buoyancy always remains below the metacentre in stable floating hull configurations. Positioning the metacentre between other centers fails to provide the required righting stability.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Normal depth in open channel flow refers to the flow depth associated with_______________?
Show answer Hide answer
Answer: D. uniform flow
Normal depth in open channel flow refers to the constant depth of uniform flow. At normal depth, gravitational driving forces exactly balance boundary frictional resistance. Channel cross-section geometry and bed slope r...
Q2. What is the term for the fluid property where molecules of differing chemical compositions experience mutual attraction________________?
Show answer Hide answer
Answer: A. adhesion
Adhesion is the physical attraction between molecules of entirely different chemical compositions. This force allows dissimilar materials, such as water and glass, to cling together. It contrasts with cohesion, which bin...
Q3. How is fluid motion classified during the gradual opening of a pipeline valve___________________?
Show answer Hide answer
Answer: B. unsteady
Gradually opening a pipeline valve causes fluid velocity and pressure to change over time. Unsteady flow is defined by fluid properties varying at any given point as time progresses. Transient flow conditions persist unt...
Q4. What atmospheric parameter is evaluated using a barometer__________________?
Show answer Hide answer
Answer: B. atmospheric pressure
A barometer is a scientific instrument specifically designed to measure local atmospheric pressure. Mercurial and aneroid barometers balance air pressure against vacuum columns or spring chambers. Changes in barometer re...
Q5. How will the liquid meniscus behave inside a submerged glass capillary tube if fluid cohesion exceeds glass-fluid adhesion_________________?
Show answer Hide answer
Answer: C. lower than the surface of liquid
When liquid cohesion exceeds glass-adhesion, molecules pull away from the solid wall. This high internal cohesive force causes the liquid surface inside the tube to depress. Consequently, the meniscus forms at a level lo...
Q6. What designation is given to a medium that offers zero resistance when displaced___________________?
Show answer Hide answer
Answer: E. ideal fluid
An ideal fluid is a theoretical medium assumed to be entirely devoid of viscosity. Zero viscosity means the fluid offers no resistance when sheared or displaced by boundaries. Ideal fluids are also treated as perfectly i...