Explanation

• Branch lines: These use smaller pipes (under 0.6 m) which clog easily, requiring closer spacing for cleaning tools.

Additional information:

• Standard codes: Civil engineering guidelines recommend spacing between 30 m and 75 m for small pipes, making 50–100 m the best fit.
• Larger pipes: Spacing increases up to 300 m only for very large sewers that humans or heavy machines can enter.

Explanation

Direct Pumping System — Short Points

• Treated water is directly pumped into distribution mains.
• No elevated/high-level reservoir is used.
• Suitable for small water supplies.
• Best for low-population areas.
• Not suitable for large communities due to lack of reserve storage.

Explanation

• Waste stack: The specific term for a vertical main pipe conveying wastewater from sinks, showers, and baths.

Additional information:

• Soil pipe: Carries human waste containing fecal matter from toilets.
• Vent pipe: Conveys air and gases, not liquid waste
• Drain pipe: A generic term for any pipe carrying water away.

Explanation

• Floor trap: Drains wastewater directly from bathroom and shower floors.

Additional information

• Gully trap: Connects external waste pipes to the main buried sewer lines.
• P-trap: Mounts behind walls under fixtures like sinks and toilets.
• Intercepting trap: Blocks public main sewer gases at the building boundary.

Explanation

• Building services: Systems like plumbing, electrical, and HVAC.

Additional information 

• Building construction: Physical assembly of the structure.
• Building planning: Designing layout and space allocation.
• Building finishing: Final aesthetic work like painting.

Explanation

• Manhole: Access chamber for line inspection and cleaning.

Additional information

• Gully trap: Disconnects waste pipes from sewers to block gases.
• Septic tank: Underground chamber for anaerobic wastewater treatment.
• Catch basin: Retains heavy debris and grit from storm runoff

Explanation

•  Standard Limit: The Indian Roads Congress (IRC) limits maximum super-elevation to 7% for plain terrain.
• Ratio: A 7% slope mathematically equals a ratio of 1 in 15.
• Purpose: This prevents slow vehicles from sliding inward.

Explanation

• Jet: The stream or column of liquid flowing out into the air or another fluid.

Additional information

• Efflux: The actual outflow or the act of flowing out.
• vena contracta: The point where the cross-section of the fluid stream is smallest, and the velocity is highest.
• Discharge: The total volume of fluid passing through a given cross-section per unit of time.

Explanation

• Skew bridge: Crosses an obstacle at an oblique angle (not a right angle).

Additional information 

• Straight/Normal bridge: Crosses an obstacle at a perfect 90-degree angle.
• Curved bridge: Features a curved alignment rather than a straight path.

Explanation

• The breaking up of the road surface into irregularly shaped pieces due to cracking is known as pothole formation.

Additional information

• Rutting: Longitudinal depressions in wheel paths.
• Corrugation: Wave-like ridges and depressions.
• Creep: Permanent longitudinal movement of pavement.