Recent questions

Average values of the re-aeration rate constant for river $\mathrm{X}$ and river $\mathrm{Y}$ are $0.92$ per day and $1.12$ per day, respectively. Average de-oxygenation ...

According to the National Ambient Air Quality Standards (Central Pollution Control Board, Govt. of India, notification 2009) which of the following statement(s) is/are co...

Consider the figure shown below for three different cases:Which of the following statement(s) is/are correct for surface level emissions, given the environmental temperat...

Carbon cycle, nitrogen cycle and phosphorus cycle play important role in the ecosystems. Which of the following statement(s) is/are NOT correct about the phosphorus cycle...

As per the Solid Waste Management Rules of 2016 (Govt. of India), which of the following statement(s) is/are correct?Biodegradable wastes should be processed biologically...

Which of the following statement(s) is/are correct regarding National Green Tribunal (NGT) of India?NGT Act 2010 draws inspiration from the India's constitutional provisi...

An individual has four different email accounts. $60 \%$ of emails come into his corporate account, $30 \%$ come into his gmail account and remaining $10 \%$ are equally ...

The area of the region (rounded off to one decimal place) enclosed between the curves $y=x$ and $y=3 \sqrt{x}$ and between the lines $x=0$ and $x=1$ is ________ units.

The Henry's law constant of $\mathrm{CO}_{2}$ is $3.4 \times 10^{-2} \mathrm{M}$ per atm in neutral water at $25^{\circ} \mathrm{C}$. The dissolved $\mathrm{CO}_{2}$ (i.e...

A solution has $0.001$ mole/L zinc ions having $\mathrm{pH}$ of $6$. Solubility product of zinc hydroxide is given as $8 \times 10^{-18}(\mathrm{~mole} / \mathrm{L})^{3}$...

An isolated storm of 3 hours occurred over a catchment area in the following manner\begin{array}{|c|c|c|c|c|}\hline Catchment \\\hline 15 & $0.5$ & $0.4$ & $2.5$ & $1.6$ ...

Two reservoirs having a difference of $20 \mathrm{~m}$ in their water surface elevations are connected through a confined aquifer (thickness $=5 \mathrm{~m}$, length $=2 ...

Two reservoirs having a difference of $10 \mathrm{~m}$ in their water surface elevations are connected by a pipeline (diameter $=10 \mathrm{~cm}$, length $=50 \mathrm{~m}...

A venturimeter along with a differential manometer was installed to measure flow in a water pipeline as shown in the following figure (not drawn to scale).Taking specific...

The depth of flow (in m, rounded off to two decimal places) in a hydraulically efficient rectangular channel $(n=1 / 80)$ to carry a discharge of $64 \mathrm{~m}^{3} / \m...

Clean water is passed through a bed of uniform spherical sand at a filtration velocity of $0.002 \mathrm{~m} / \mathrm{sec}$. The sand grains are $0.4 \mathrm{~mm}$ in di...

A sewage treatment plant with a capacity of 10 million litres per day (MLD) is treating the sewage through an aerobic biological process. The inlet and outlet BOD are mea...

A ground level source emits $1000 \mathrm{~g}$ per day of $\mathrm{SO}_{2}$. In vicinity of the source, ambient temperature is measured at $10 \mathrm{~m}$ and $110 \math...

A centrifuge is processing 1000 litres per hour of water containing 2 g per litre of suspended solids. The thickened slurry coming out of the centrifuge has solids concen...

Figure below gives the heat inflow into the furnace of a waste-to-energy plant along with the heat outflows from the furnace. Assume: (i) total heat loss equal to $3 \%$...