What term is used for the center of gravity of the volume of liquid displaced by a floating body ___________________?
Show answer Hide answer
Answer: D. centre of buoyancy
Explanation
The center of buoyancy corresponds geometrically to the centroid of the displaced fluid volume. Upward buoyant forces act directly through this specific point on any floating object. Its relative position compared to the center of gravity determines flotation stability. Archimedes principle states that displaced fluid volume dictates the magnitude of buoyancy. Liquid density and displaced volume together determine the total upward buoyant force magnitude. Floating bodies adjust their immersion depth until weight and buoyancy forces balance perfectly.
Ship designers calculate the center of buoyancy to ensure vessels remain upright at sea. Submersibles control their depth by altering water ballast to shift their overall buoyancy. Floating platforms rely on stable buoyant centers to withstand ocean waves and currents. Center of gravity is the point where the total weight of the body acts downward. Center of pressure applies to distributed fluid forces acting on submerged solid surfaces. Metacentre is the intersection point of buoyant force lines when a ship is tilted.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. What parameters dictate how coal will behave inside a combustion furnace_______________________?
Show answer Hide answer
Answer: C. the proximate analysis
Proximate analysis measures moisture, volatile matter, fixed carbon, and ash, defining how coal ignites and burns. Combustion efficiency and flame stability depend directly on the volatile matter and fixed carbon proport...
Q2. What variables are plotted on true stress-strain diagrams for engineering materials__________________?
Show answer Hide answer
Answer: B. load/instantaneous cross-sectional area original area and log
True stress-strain diagrams plot true stress based on instantaneous cross-sectional area against natural logarithmic strain increments. Using instantaneous area accounts for the continuous reduction in specimen cross-sec...
Q3. What is the approximate capillary height of water at 20°C inside a clean glass tube with a 1 mm bore____________________?
Show answer Hide answer
Answer: E. 30 mm
Capillary action causes water to rise inside small-diameter glass tubes due to the adhesive forces between water and glass. Surface tension forces pull the liquid column upward until the weight of the water column balanc...
Q4. What characterizes the sublimation region on a phase diagram__________________?
Show answer Hide answer
Answer: A. solid and vapour phases are in equi-librium
The sublimation region on a thermodynamic phase diagram defines the equilibrium boundary where solid and vapor phases coexist. Along this specific boundary line, molecules transition directly between solid and gas states...
Q5. Typically, how much coal is consumed per kWh generated in a standard thermal power plant__________________?
Show answer Hide answer
Answer: C. 0.6 to 0.8 kg
Standard coal-fired thermal power plants typically consume around zero point six to zero point eight kilograms of coal per kilowatt-hour. Thermodynamic losses in boilers, steam turbines, and electrical generators dictate...
Q6. What is the typical compression ratio range for standard passenger car engines___________________?
Show answer Hide answer
Answer: B. 7
The compression ratio of an internal combustion engine compares cylinder volume at bottom dead center to top dead center. Standard passenger car gasoline engines are designed with compression ratios ranging typically bet...