Identifying the Incorrect Sewer Statement
The question requires identifying the incorrect statement among the given options related to sewer systems. Let's examine each statement:
- Option 1: Manholes are provided in sewer pipes at suitable intervals
Analysis: This statement is correct. Manholes are essential access points for inspection, cleaning, and maintenance of sewer lines at regular intervals.
- Option 2: Catch basins are generally provided in sewers for carrying drainage discharge
Analysis: This statement is generally correct. Catch basins are structures designed to collect surface water runoff (drainage discharge) before it enters the sewer system, primarily in storm drainage.
- Option 3: Inlets are generally provided in all sewers
Analysis: This statement is incorrect. Inlets are specifically designed openings that allow surface water to enter a storm sewer system. They are characteristic of storm sewers, not sanitary sewers (which handle wastewater) or all types of sewers universally.
- Option 4: None of the these
Analysis: Since statement 3 is identified as incorrect, this option is not the correct answer.
Therefore, the incorrect statement is that inlets are generally provided in all sewers.
Important Questions from Design of Sewer
Which of the following statements is NOT correct?
The average daily flow of wastewater generated from residential, commercial, and industrial sources, specifically excluding any contribution from rainfall or stormwater, is commonly referred to as:
As per NBO, the gradient required to generate self-cleansing velocity for a 100 mm Φ sewer is _____.
Which of the following problems does proper sewer ventilation help to mitigate?
Maximum velocity condition in a flow-through circular channel section is:
