Recent questions tagged gatees-2026

The analysis of a water sample is shown in the table. The hardness of the water sample is $\_\_\_\_$ $\mathrm{mg} / \mathrm{L}$ as $\mathrm{CaCO}_{3}$.Atomic weight $(\ma...

A system of linear equations is given as $\mathrm{A X}=\mathrm{B}$, where $\mathrm{A}=\left[\begin{array}{cc}2 & 5 \\ 5 & -2\end{array}\right], \quad \mathrm{B}=\left[\be...

Which of the following statements is/are CORRECT based on the electron donor $\text{(ED)}$ and electron acceptor $\text{(EA)}$ used in various bacterial mediated reaction...

Which of the following options is/are TRUE about reverse osmosis process?Reverse osmosis is used as a pretreatment for microfiltration process.Ultrafiltration is used as ...

Which of the following options is/are TRUE about coagulation-flocculation process?Collision of colloidal particles due to their Brownian motion results in orthokinetic fl...

Which of the following options is/are CORRECT assumption(s) in the Gaussian plume dispersion model?The concentration of pollutants emitting from stack is continuous.The p...

The sound level measured at various locations in an urban area is given in the table.The average sound level for that area is $\_\_\_\_$ dBA (rounded off to two decimal p...

Standard deviation for the particulate matter (PM) concentrations listed in the table is $\_\_\_\_$ $\mu \mathrm{g} / \mathrm{m}^{3}$ (rounded off to one decimal place).$...

The mixing ratio of $\mathrm{CO}_{2}$ at a pressure of $1$ $\mathrm{atm}$ and at $300$ $\mathrm{K}$ is reported as $340$ $\mathrm{ppmv}$.Considering ideal gas conditions,...

Reaction $\mathrm{A} \rightarrow \mathrm{B}$ follows first-order elementary kinetics and the reaction rate constant for $\text{A}$ is $0.01$ per min.The time taken to red...

The following two reactions describe the chemistry of $\text{S(IV)}$ in an aquatic system.Under ideal conditions, the equilibrium constants for reactions $\text{(i)}$ and...

The calibration graph between absorbance and the concentration of chromate $\left(\mathrm{CrO}_{4}{ }^{2-}\right)$ in a water sample is shown in the figure.For an absorba...

A thermal process, at a specific temperature, results in $2-\log _{10}$ removal of non-thermotolerant pathogenic microorganisms from a water sample in $20$ min.The time n...

In a batch culture experiment, $2$ cells of a microorganism were added to a growth medium. During the experiment, a lag phase of $1$ hour was first experienced by the add...

A cylindrical roller gate of diameter $6.0$ $\mathrm{m}$ and length $10.0$ $\mathrm{m}$ is placed on a dam to store water behind it, as shown in figure.The magnitude of t...

The mass curve of a rainfall event of $100$ $\mathrm{min}$ duration over a catchment is given in the table.If the initial loss is $0.6$ $\mathrm{cm}$ and $\phi$-index is ...

A well penetrates an unconfined aquifer. The water level (i.e., head) in the well prior to pumping is $25$ $\mathrm{m}$. After a long period of pumping at a constant rate...

A sewage treatment plant employing activated sludge process is operated under the following conditions:Wastewater flow rate into the aeration $\operatorname{tank}=0.150 \...

A continuous flow stirred tank reactor (CSTR) operates under a steady-state condition with a flow rate of $300$ $\text{L}$ per hour. The influent concentration of a subst...

In a stack emission measurement at an industry, the stack cross-sectional area at $30$ m height was divided into four equal sectors. The measured velocities and $\mathrm{...