GATE Water and Waste Water Quality and Treatment: Unit processes and operations – Previous Year Questions
9 GATE previous year questions on Unit processes and operations (Water and Waste Water Quality and Treatment, Civil Engineering) with answers and explanations, from every paper.
- GATE 2023 CE (CE1) Q45 – In the following table, identify the correct set of associations between the entries in Column-1 and Column-2. Column-1 Column-2 --- --- P: Reverse…
- GATE 2023 CE (CE1) Q63 – A flocculator tank has a volume of 2800 m3. The temperature of water in the tank is 15°C, and the average velocity gradient maintained in the tank is…
- GATE 2024 CE (CE2) Q42 – A hypothetical multimedia filter, consisting of anthracite particles (specific gravity: 1.50), silica sand (specific gravity: 2.60), and ilmenite sand…
- GATE 2024 CE (CE1) Q60 – Activated carbon is used to remove a pollutant from wastewater in a mixed batch reactor, which follows first-order reaction kinetics. At a reaction…
- GATE 2025 CE (CE1) Q31 – The Surface Overflow Rate (SOR) in a rectangular sedimentation tank is 45 m3/m2/d. Minimum diameters of spherical inorganic and organic particles…
- GATE 2026 CE (CE2) Q63 – The analysis of major cations and anions in a water sample collected from a city's water supply is given below. Ions present in minor concentrations…
- GATE 2026 CE (CE1) Q21 – A rapid sand filter bed of depth 0.8 m has 40 % porosity during service cycle. It is recommended that during backwash operation, the expanded filter…
- GATE 2026 CE (CE1) Q22 – The settling velocity of inorganic particles in the sedimentation tank of a water treatment plant is governed by
- GATE 2026 CE (CE1) Q65 – The maximum demand at a water purification plant has been estimated as 12 million litres per day. For the raw supplies, a rectangular sedimentation…