List of top Environmental Engineering Questions on Unit processes and operations asked in GATE CE

In the following table, identify the correct set of associations between the entries in Column-1 and Column-2. \[ \begin{array}{|c|c|} \hline \textbf{Column-1} & \textbf{Column-2} \\ \hline \text{P: Reverse Osmosis} & \text{I: Ponding} \\ \hline \text{Q: Trickling Filter} & \text{II: Freundlich Isotherm} \\ \hline \text{R: Coagulation} & \text{III: Concentration Polarization} \\ \hline \text{S: Adsorption} & \text{IV: Charge Neutralization} \\ \hline \end{array} \]

In the context of water and wastewater treatments, the correct statements are:

A system of seven river segments is shown. Given: $Q_1=5$ m$^3$/s, $Q_2=15$ m$^3$/s, $Q_4=3$ m$^3$/s (outflow), $Q_6=8$ m$^3$/s; $C_1=8$ kg/m$^3$, $C_2=12$ kg/m$^3$, $C_6=10$ kg/m$^3$. Assume complete mixing at junctions, no gains/losses otherwise, steady state. Find the pollutant concentration in segment $R_7$ (in kg/m$^3$, rounded to two decimals).

A system of seven river segments is shown. Given: $Q_1=5$ m$^3$/s, $Q_2=15$ m$^3$/s, $Q_4=3$ m$^3$/s (outflow), $Q_6=8$ m$^3$/s; $C_1=8$ kg/m$^3$, $C_2=12$ kg/m$^3$, $C_6=10$ kg/m$^3$. Assume complete mixing at junctions, no gains/losses otherwise, steady state. Find the pollutant concentration in segment $R_7$ (in kg/m$^3$, rounded to two decimals).