Recent questions

The municipal solid waste $\text{(MSW)}$ generated in a community $\text{(population =(100000)}$ is disposed on a $12 \times 10^4 \mathrm{m}^2$ landfill site, which can b...

A mechanized stationary container system is proposed for waste collection from a commercial area. The container unloading time is $0.1$ hours per container. There are two...

Excess amount of solid calcium sulphate $\left(\mathrm{CaSO}_4\right)$ was added to a pure water sample $(\mathrm{pH}=7)$ so that some solids remain undissolved at the eq...

The molar concentrations $(M$, i.e. $m o l / L)$ of some ionic species in a water sample were estimated as follows:$\mathrm{Na}^{+}=0.25{\mathrm{M} ; \mathrm{Ca}^{2+}}^{2...

A facultative pond system for sewage treatment consists of two ponds in series. The hydraulic retention time $\text{(HRT)}$ of each pond is $6$ days. The total $\text{BOD...

A student reported following arsenic concentrations in water samples:$$\begin{array}{|l|l|l|l|l|l|l|l|}\hline \text{Arsenic concentration (mg/L)} & 0.10 & 0.12 & 0.20 & 0...

Assuming $\mathrm{s}>0$; Laplace transform for $f(x)=\sin a x$ is$\frac{a}{s^{2}+a^{2}}$$\frac{s}{s^{2}+a^{2}}$$\frac{a}{s^{2}-a^{2}}$$\frac{s}{s^{2}-a^{2}}$

$\mathrm{X}$ is normally distributed with following data $(25.8,36.6,26.3,21.8,27.2)$. Select the correct statement about $X\left(\mathrm{t}_{\text {crit }, \alpha}=0.05,...

Given $\mathbf{P}$ is $m \times n$ matrix, $\mathbf{Q}$ is $n \times l$ matrix, $\mathbf{R}$ and $\mathbf{S}$ are $n \times n$ matrices, and superscript $\mathrm{T}$ deno...

Ten litres of the sample was filtered through a membrane filter and the filter was transferred to solid agar media which supports growth of coliform organisms. After incu...

Specific conductance is used in water analysis to indirectly estimate dissolved solids. The measurements used in the method accounts forCations onlyAll ionsAnions onlyUn-...

Reverse Transcriptase Polymerase Chain Reaction is an analytical procedure used in detection of pathogenic microorganisms. Which one of the following statements is NOT co...

Consider the following statementsStatement $1$: Goodrich method for reservoir routing is based on hydrologic flood routing method.Statement $2$: Muskingum method for chan...

Centrifugal pumps with suction pipe (shown by solid arrow) and delivery pipe (shown by dotted arrow) are shown in the figures. Choose the option that gives the correct co...

The correct order of hydraulic conductivity for the geologic formations isAquifer $>$ Aquitard $>$ Aquiclude $>$ AquifugeAquifer $<$ Aquitard $<$ Aquiclude $<$ AquifugeAq...

Carbon dioxide is used in recarbonation process. A solution has $1 \mathrm{~mole} / \mathrm{L}$ supersaturated calcium carbonate. Estimated amount of carbon dioxide (in g...

A river water sample has $\mathrm{pH}$ of $4$ and suspended solids concentration of $100 \; \mathrm{mg} / \mathrm{L}$. If, alum is chosen as a coagulant, what will be the...

Which one of the following is most commonly used raw material in flue gas desulfurization units?LimestoneTitanium OxideFenton reagentBeryllium Oxide

Leachate generated from a legacy municipal solid waste dumping site has to be collected and managed carefully. Which one of the following statements is correct in the con...

Which one of the following statements is correct regarding Global warming?Water vapour does not contribute to global warming.Global warming is likely to increase the prod...