Where does the net liquid pressure force act on a fully submerged body____________________?
Show answer Hide answer
Answer: B. centre of pressure
Explanation
The net hydrostatic pressure force on a fully submerged body acts through the center of pressure. Integrating distributed fluid pressure forces across a submerged surface yields a single resultant force acting at the center of pressure. Fluid mechanics principles locate the point of application of total hydrostatic force strictly at the center of pressure. Hydrostatic pressure increases linearly with depth below a free liquid surface according to fluid statics laws. The center of pressure always lies below the geometric center of gravity for submerged vertical flat surfaces. Calculating both magnitude and location of fluid pressure forces is essential for designing submerged structural walls.
The center of gravity represents the point where total body weight acts rather than the net fluid pressure force. The metacentre defines stability limits for floating bodies rather than the application point of submerged pressure forces. The center of buoyancy is the point where buoyant upward lift forces act, distinct from net hydrostatic pressure forces.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. If the condenser temperature remains unchanged, how does the C.O.P of a refrigeration cycle respond to a rise in evaporator temperature______________________?
Show answer Hide answer
Answer: A. increase
Raising the evaporator temperature increases suction pressure and refrigerant vapor density. Higher suction density increases mass flow rate and improves refrigeration COP. Reducing the temperature lift between evaporato...
Q2. What does steel consist of____________________?
Show answer Hide answer
Answer: B. 50% or more iron
Steel is an alloy primarily composed of iron, typically containing 50% or more iron. Carbon and other alloying elements are added to iron to enhance mechanical strength and hardness. Iron serves as the foundational base...
Q3. Standard air is defined as atmospheric air at_____________________?
Show answer Hide answer
Answer: B. 20°C and 1 kg/cm2 and relative humidity 36%
Standard air is conventionally defined in industrial engineering at specific reference conditions including temperature and humidity. These standardized parameters include a temperature of twenty degrees Celsius, one kil...
Q4. Compared to fire tube boilers, water tube boilers generate steam that_________________?
Show answer Hide answer
Answer: A. can be raised rapidly
Water tube boilers contain water inside small tubes surrounded by hot combustion gases. Small water volumes inside heated tubes allow steam to be raised rapidly. Large heating surface areas enable rapid thermal response...
Q5. How does the presence of non-condensable gases affect the actual condensing pressure relative to the required pressure without them ____________________ ?
Show answer Hide answer
Answer: A. will be higher
The presence of non-condensable gases increases the total condensing pressure in a system. Dalton Law of partial pressures states that total pressure equals the sum of individual gas pressures. Trapped air adds its own p...
Q6. In SI units, the specific weight of water is equal to ________________?
Show answer Hide answer
Answer: C. 9.81 xlO3 N/m3
The specific weight of a fluid is calculated by multiplying its mass density by gravitational acceleration. For water, the standard density is approximately one thousand kilograms per cubic meter. Multiplying one thousan...