Questions by admin

A flask (100 ml volume) has wastewater, which has $0.12 \mathrm{mg} / \mathrm{L}$ geosmin. Activated carbon is added in this flask for adsorbing geosmin as per the Freund...

A pipeline is designed to deliver $20 \mathrm{~L} / \mathrm{s}$ of an oil (kinematic viscosity $=6 \times 10^{-6} \mathrm{~m}^2 / \mathrm{s}$ and specific gravity $=0.9$ ...

You are doing an experiment to find out $\mathrm{BOD}_5$ of a wastewater. You have taken $25 \mathrm{~mL}$ wastewater having ultimate BOD of $75 \mathrm{mg} / \mathrm{L}$...

In a $30 \mathrm{~m}^{3}$ room, a stove in operation consumes wood at the rate of $0.25 \mathrm{~kg} / \mathrm{h}$. The inflow and outflow rate of air in the room is the ...

A city generates on average $1000$ metric tonnes/day of municipal solid waste and follows integrated waste management system. $15 \%$ of the total waste is recycled, $40 ...

An industry with an effective stack height of $80 \mathrm{~m}$ emits $1200 \mathrm{~g} / \mathrm{h}$ of $\mathrm{CO}$. The windrose plotted using the meteorological data ...

Ms. Anita uses a BS-IV two wheeler petrol scooter, with a mileage of $50 \mathrm{~km} / \mathrm{L}$, to travel $30 \mathrm{~km}$ every day. She exchanges this two wheeler...

Ultimate analysis of a municipal solid waste sample is given below\begin{array}{|c|c|c|c|c|}\hline { Percent by weight } \\\hline Carbon & Hydrogen & Oxygen & Nitrogen & ...

An adult of $65 \mathrm{~kg}$ weight and life span of 65 years drinks water for 5 years, which is contaminated with toluene of concentration $0.15 \mathrm{mg} / \mathrm{L...

An aeration tank needs to be installed for the removal of VOC from water, where the required rate of flow of water through the aeration tank is $180,000 \mathrm{~m}^{3} /...

The current population of a city is $11,02,500$. If it has been increasing at the rate of $5 \%$ per annum, what was its population $2$ years ago?$9,92,500$$9,95,006$$10,...

$p$ and $q$ are positive integers and $\frac{p}{q}+\frac{q}{p}=3$ \end{tabular} then, $\frac{p^{2}}{q^{2}}+\frac{q^{2}}{p^{2}}=$$3$$7$$9$$11$

The least number of squares that must be added so that the line $P-Q$ becomes the line of symmetry is$4$ $3$$6$$7$

Nostalgia is to anticipation as is to Which one of the following options maintains a similar logical relation in the above sentence?Present, pastFuture, pastPast, futureF...

Consider the following sentences:$\text { (i) I woke up from sleep.}$ $\text { (ii) I woked up from sleep.}$$\text { (iii) I was woken up from sleep.}$$\text { (iv) I was...

Given below are two statements and two conclusions.$\text { Statement 1: All purple are green.}$$\text { Statement 2: All black are green.}$$\text { Conclusion I: Some bl...

Computers are ubiquitous. They are used to improve efficiency in almost all fields from agriculture to space exploration. Artificial intelligence (AI) is currently a hot ...

Consider a square sheet of side $1$ unit. In the first step, it is cut along the main diagonal to get two triangles. In the next step, one of the cut triangles is revolve...

The number of minutes spent by two students, $X$ and $Y$, exercising every day in a given week are shown in the bar chart above. The number of days in the given week in w...

Corners are cut from an equilateral triangle to produce a regular convex hexagon as shown in the figure above.The ratio of the area of the regular convex hexagon to the a...