What is the term for the point on a submerged surface through which the resultant liquid pressure force passes_________________?
Show answer Hide answer
Answer: B. center of pressure
Explanation
The center of pressure is defined as the specific point on a submerged surface where the resultant hydrostatic pressure acts. Integration of distributed fluid pressure forces over a submerged area locates this resultant force beneath the centroid. Calculating the center of pressure is essential for determining overturning moments on hydraulic retention walls. Hydrostatic pressure increases linearly with depth below a free liquid surface according to fluid density and gravity. The center of pressure always lies deeper than the geometric centroid of a submerged plane surface due to pressure gradient effects. Moments created by distributed fluid pressure forces must balance around the designated center of pressure.
Option A refers to the metacenter, which determines floating body stability rather than submerged surface pressure. Option C denotes the center of buoyancy, which represents the centroid of the displaced liquid volume. Option D represents the center of gravity, which is the point where total body weight acts downwards.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. What is the typical carbon content percentage in low carbon steels__________________?
Show answer Hide answer
Answer: B. 0.15%
Low carbon steels, frequently designated as mild steels, contain very low percentages of carbon to maintain high formability. A typical carbon content of approximately zero point fifteen percent provides a balance betwee...
Q2. Which component of a shaft coupling is responsible for directly transmitting rotational power from the driving shaft to the driven shaft_________?
Show answer Hide answer
Answer: B. hub
The key fits into keyways on both the driving and driven components within the hub to directly transmit torque and rotational power. This mechanical fastener locks the shaft and hub together, preventing relative rotation...
Q3. At what chimney height condition does maximum combustion gas discharge occur_____________________?
Show answer Hide answer
Answer: C. equal to the height of the hot gas column producing draught
Chimney draft is produced by the density difference between hot internal gases and cold air. Maximum discharge occurs when the chimney height equals the theoretical hot gas column height. Extending the chimney beyond thi...
Q4. What percentage range of carbon is typically found in raw pig iron___________________?
Show answer Hide answer
Answer: D. 4 to 4.5%
Raw pig iron is the primary crude metal produced by smelting iron ore with coke and limestone inside a blast furnace. The molten iron absorbs large amounts of carbon from the burning coke during the reduction process in...
Q5. At what specific pressure condition does the latent heat of vaporization of water drop to zero_________________?
Show answer Hide answer
Answer: E. 225.6 kg/cm2
At the critical pressure of 225.6 kg/cm2 (approximately 22.1 MPa), the latent heat of vaporization of water drops to zero. At this unique thermodynamic endpoint, the properties of liquid water and steam merge into a sing...
Q6. What specification requirement must the pour point of diesel fuel meet_________________?
Show answer Hide answer
Answer: A. lower than the coldest atmospheric temperature at which oil is to be pumped
The pour point of diesel fuel indicates the lowest temperature at which it flows freely. This temperature must remain lower than the coldest ambient operating environment expected. If ambient temperature drops below the...