Questions by admin

Consider the following equation:$x^{3}-10 x^{2}+31 x-30=0$Which of the following is/are the root(s) of the above equation?$1$$2$$3$$4$

A flocculation tank used for water treatment has a velocity gradient $(G)$ of $800 \mathrm{~s}^{-1}$. The volume of the tank is $40 \mathrm{~m}^{3}$. The dynamic viscosit...

A wind rose is a representation of meteorological conditions. Which of the following is/are included in this representation?Mixing heightWind speedWind directionPercentag...

In a sample, the growth of microbial cells started with an initial concentration of $5 \times 10^4$ cells per millilitre $(\mathrm{mL})$ of the sample. After a certain ti...

A water jet discharging from a $4 \mathrm{~cm}$ diameter orifice has a diameter of 3.5 $\mathrm{cm}$ at its vena contracta. The coefficient of velocity is defined as the ...

Match the entries in Column I with the correct entries in Column II.Column IColumn IIDiffusionPasquillDrag forceFickAtmospheric stabilityStokes$\text{P-(iii), Q-(ii), R-(...

A biased die has six faces numbered as $k=1,2,3,4,5$, and $6$. On rolling the die, the probability of the number k appearing is proportional to $k^{2}$. What is the proba...

Which of the following international multilateral agreements $\text{(conventions, protocols)}$ from Column I match with the entries in Column II?Column IColumn IIRamsar C...

An ideal PFR or an ideal CFSTR may be used to degrade a pollutant with first order reaction kinetics. Both the reactors are fed with the same inlet concentration and the ...

A $200 \mathrm{~mL}$ sample of water has an initial $\mathrm{pH}=9$. In order to determine alkalinity, the sample was titrated using $0.02 \mathrm{~N} \mathrm{H}_2 \mathr...

A sewage treatment plant $\text{(STP)}$ receives sewage at a flow rate of $20000 \mathrm{~m}^3$ per day. The sewage has $200 \mathrm{mg} / \mathrm{L}$ of suspended solids...

In context of municipal solid waste treatment, match the equipment in List I with their function in List II.List IList IITrommelSize reductionMagnetic separatorAluminium ...

The characteristics of a water sample are as follows: $\mathrm{Na}^{+}=92 \mathrm{mg} / \mathrm{L}$, $\mathrm{K}^{+}=19.5 \mathrm{mg} / \mathrm{L}, \mathrm{Ca}^{2+}=40 \m...

Which of the following is true for the nitrifying bacteria belonging to genus Nitrobacter?They are autotrophs.They are eukaryotes.They convert chemical energy to cellular...

Which of the following isiare the dominant mechanism(s) for the removal of spherical particles with diameter less than $10 \mu \mathrm{m}$ from a gas stream using a fabri...

In air pollution, which of the following is/are classified as primary pollutants?Carbon monoxide $(\mathrm{CO})$Sulphur dioxide $\left(\mathrm{SO}_{2}\right)$Ozone $\left...

Which of the following is/are correct for the process of glycolysis?There is net decrease in standard Gibbs free energy.The end product is glyceraldehyde 3-phosphate.Fist...

In the context of water quality, which of the following is/are correct for the most probable number $\text{(MPN)}$ of a water sample?The estimated organisms are gram nega...

If $f(x)+3 f(g(x))=x-2$where $g(x)=\frac{3 x+1}{x-3}$ then the value of the ratio $\frac{f(5)}{f(8)}$ is _________.$\text{(answer in integer)}$