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Most answered questions in Environmental Engineering
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81
GATE2014-1-22
The amount of $CO_2$ generated (in kg) while completely oxidizing one kg of $CH_4$ to the end products is _________
The amount of $CO_2$ generated (in kg) while completely oxidizing one kg of $CH_4$ to the end products is _________
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Environmental Engineering
gate2014-ce-1
numerical-answers
environmental-engineering
+
–
0
votes
0
answers
82
GATE Civil 2013 | Question: 42
A settling tank in a water treatment plant is designed for a surface overflow rate of $30 \dfrac{m^3}{\text{day} \cdot m^2}$. Assume specific gravity of sediment particles $=2.65$, density of water $(\rho) =1000 \: kg/m^3$, dynamic viscosity of ... The approximate minimum size of particles that would be completely removed is $0.01$ mm $0.02$ mm $0.03$ mm $0.04$ mm
A settling tank in a water treatment plant is designed for a surface overflow rate of $30 \dfrac{m^3}{\text{day} \cdot m^2}$. Assume specific gravity of sediment particle...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2013-ce
water-treatment-plant
water-and-waste-water-quality-and-treatment
environmental-engineering
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–
0
votes
0
answers
83
GATE Civil 2013 | Question: 43
A student began experiment for determination of $5$-day, $20^{\circ}C$ BOD on Monday. Since the $5$th day fell on Saturday, the final DO readings were taken on next Monday. On calculation, BOD (i.e. $7$ day, $20^{\circ}C$ was found to be $150$ ... )? Assume value of BOD rate constant $(k)$ at standard temperature of $20^{\circ}C$ as $0.23/day$ (base $e$). ___________
A student began experiment for determination of $5$-day, $20^{\circ}C$ BOD on Monday. Since the $5$th day fell on Saturday, the final DO readings were taken on next Monda...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2013-ce
numerical-answers
environmental-engineering
water-and-waste-water-quality-and-treatment
biological-oxygen-demand
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–
0
votes
0
answers
84
GATE Civil 2013 | Question: 20
Some of the water quality parameters are measured by titrating a water sample with a titrant. Group I gives a list of parameters and Group-II gives the list of titrants. ... $P - 2, Q - 1, R - 4, S - 3$ $P - 4, Q - 3, R - 2, S - 1$
Some of the water quality parameters are measured by titrating a water sample with a titrant. Group I gives a list of parameters and Group-II gives the list of titrants.$...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2013-ce
environmental-engineering
water-and-waste-water-quality-and-treatment
alkalinity-of-water-sample
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–
0
votes
0
answers
85
GATE Civil 2013 | Question: 21
A water treatment plant is designed to treat $1 \: m^3/s$ of raw water. It has $14$ sand filters. Surface area of each filter is $50 \: m^2$. What is the loading rate (in $\dfrac{m^3}{\text{day} \cdot m^2}$) with two filters out of service for routine backwashing? __________
A water treatment plant is designed to treat $1 \: m^3/s$ of raw water. It has $14$ sand filters. Surface area of each filter is $50 \: m^2$. What is the loading rate (in...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2013-ce
numerical-answers
water-and-waste-water-quality-and-treatment
environmental-engineering
water-treatment-plant
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–
0
votes
0
answers
86
GATE Civil 2012 | Question: 50
An activated sludge system (sketched below) is operating at equilibrium with the following information. Wastewater related data: flow rate $= 500 \: m^3/hour$, influent BOD $=150 \: mg/L$, effluent BOD $=10 \: mg/L$. Aeration tank related data: hydraulic retention ... ratio (in kg BOD per kg biomass per day) for the aeration tank is $0.015$ $0.210$ $0.225$ $0.240$
An activated sludge system (sketched below) is operating at equilibrium with the following information. Wastewater related data: flow rate $= 500 \: m^3/hour$, influent B...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2012-ce
water-and-waste-water-quality-and-treatment
environmental-engineering
sludge-disposal
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–
0
votes
0
answers
87
GATE Civil 2012 | Question: 51
An activated sludge system (sketched below) is operating at equilibrium with the following information. Wastewater related data: flow rate $=500 \: m^3/hour$, influent BOD $= 150 mg/L$, effluent BOD $=10 \: mg/L$ ... $24000$ $1000$ $800$ $33$
An activated sludge system (sketched below) is operating at equilibrium with the following information. Wastewater related data: flow rate $=500 \: m^3/hour$, influent BO...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2012-ce
water-and-waste-water-quality-and-treatment
environmental-engineering
sludge-disposal
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–
0
votes
0
answers
88
GATE Civil 2012 | Question: 42
A water sample has a pH of $9.25$. The concentration of hydroxyl ions in the water sample is $10^{-9.25}$ moles/L $10^{-4.75}$ mmoles/L $0.302$ mg/L $3.020$ mg/L
A water sample has a pH of $9.25$. The concentration of hydroxyl ions in the water sample is$10^{-9.25}$ moles/L$10^{-4.75}$ mmoles/L$0.302$ mg/L$3.020$ mg/L
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2012-ce
water-and-waste-water-quality-and-treatment
environmental-engineering
basics-of-water-quality-standards
hydroxyl-ions
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–
0
votes
0
answers
89
GATE Civil 2012 | Question: 43
A town is required to treat $4.2 \: m^3/min$ of raw water for daily domestic supply. Flocculating particles are to be produced by chemical coagulation. A column analysis indicated that an overflow rate of $0.2$ mm/s will produce satisfactory particles removal in a ... depth of $3.5$ m. The required surface area (in $m^2$) for settling is $210$ $350$ $1728$ $21000$
A town is required to treat $4.2 \: m^3/min$ of raw water for daily domestic supply. Flocculating particles are to be produced by chemical coagulation. A column analysis ...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2012-ce
water-and-waste-water-quality-and-treatment
environmental-engineering
required-surface-area
chemical-coagulation
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–
0
votes
0
answers
90
GATE Civil 2012 | Question: 21
... $\textbf{[a]}$ and $\textbf{[r]}$ are false $\textbf{[a]}$ is true but $\textbf{[r]}$ is false
$\begin{array}{lcl} \textbf{Assertion [a]} &: & \text{At a manhole, the crown of the outgoing sewer should not be higher} \\ & & \text{than the crown of the incoming sewe...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2012-ce
water-and-waste-water-quality-and-treatment
environmental-engineering
sewerage-treatment
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–
0
votes
0
answers
91
GATE Civil 2012 | Question: 20
A sample of domestic sewage is digested with silver sulphate, sulphuric acid, potassium dichromate and mercuric sulphate in chemical oxygen demand (COD) test. The digested sample is then titrated with standard ferrous ammonium sulphate (FAS) to determine the un-reacted amount of mercuric sulphate potassium dichromate silver sulphate sulphuric acid
A sample of domestic sewage is digested with silver sulphate, sulphuric acid, potassium dichromate and mercuric sulphate in chemical oxygen demand (COD) test. The digeste...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 25, 2018
Water and Waste Water Quality and Treatment
gate2012-ce
water-and-waste-water-quality-and-treatment
water-resources-engineering
sewage-treatment-design
+
–
0
votes
0
answers
92
GATE2018 CE-2: 52
A schematic flow diagram of a completely mixed biological reactor with provision for recycling of solids shown in the figure. $S_0$, $S$ = readily biodegradable soluble BOD, mg/L $Q, \: Q_r, \: Q_w$ = flow rates $m^3/d$ ... (mixed liquor soils volatile suspended solids or MLVSS ), mg/l The mean cell residence time (in days, up to one decimal place) is _____
A schematic flow diagram of a completely mixed biological reactor with provision for recycling of solids shown in the figure. $S_0$, $S$ = readily biodegradable soluble B...
gatecse
4.0k
points
gatecse
asked
Feb 17, 2018
Municipal Solid Wastes
gate2018-ce-2
numerical-answers
municipal-solid-waste
environmental-engineering
engineered-system-for-solid-waste-management
+
–
0
votes
0
answers
93
GATE2018 CE-2: 15
In the figures, Group I represents the atmospheric temperature profiles (P, Q, R and S) and Group II represents dispersion of pollutants from a smoke stack $(1, 2, 3$ and $4)$. In the figures of Group I, the dashed line represents the dry adiabatic lapse rate, whereas the horizontal axis represents temperature and ... $P-1, Q-4, R-3, S-2$ $P-3, Q-1, R-2, S-4$
In the figures, Group I represents the atmospheric temperature profiles (P, Q, R and S) and Group II represents dispersion of pollutants from a smoke stack $(1, 2, 3$ and...
gatecse
4.0k
points
gatecse
asked
Feb 17, 2018
Air Pollution
gate2018-ce-2
environmental-engineering
air-pollution
sources-and-impacts-of-pollutants
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