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Recent questions tagged environmental-engineering
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1
GATE Civil 2024 Set 1 | Question: 21
The primary air pollutant(s) is/are Sulfur dioxide Lead Ozone Sulphuric acid
The primary air pollutant(s) is/areSulfur dioxideLeadOzoneSulphuric acid
admin
4.2k
points
admin
asked
Feb 16
Air Pollution
gatecivil-2024-set1
environmental-engineering
air-pollution
types-of-pollutants
+
–
0
votes
0
answers
2
GATE2020 CE-2-16
The relationship between oxygen consumption and equivalent biodegradable organic removal (i.e.,BOD) in a closed container with respect to time is shown in the figure Assume that the rate of oxygen consumption is directly proportional to the amount of degradable organic matter and is expressed as ... is $BOD_5 = L_5$ $BOD_t = L_0-L_t$ $L_0 = L_te^{-kt}$ $L_t = L_0(1-e^{-kt})$
The relationship between oxygen consumption and equivalent biodegradable organic removal (i.e.,BOD) in a closed container with respect to time is shown in the figureAssum...
go_editor
5.3k
points
go_editor
asked
Feb 13, 2020
Water and Waste Water Quality and Treatment
gate2020-ce-2
environmental-engineering
effluent-discharge-standards
biological-oxygen-demand
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–
0
votes
0
answers
3
GATE2017 CE-2-6
Consider a rigid retaining wall with partially submerged cohesionless backfill with a surcharge. Which one of the following diagrams closely represents the Rankine’s active earth pressure distribution against this?
Consider a rigid retaining wall with partially submerged cohesionless backfill with a surcharge. Which one of the following diagrams closely represents the Rankine’s ac...
gatecse
4.0k
points
gatecse
asked
Aug 7, 2019
Foundation Engineering
gate2017-ce-2
foundation-engineering
environmental-engineering
rankines-earth-pressure-theory
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–
0
votes
0
answers
4
GATE2017 CE-2-8
As per Noise Pollution (Regulation and Control) Rules $2000$ of India, the day time noise limit for a residential zone, expressed in dB(A)L$_{eq}$, is $55$ $65$ $75$ $85$
As per Noise Pollution (Regulation and Control) Rules $2000$ of India, the day time noise limit for a residential zone, expressed in dB(A)L$_{eq}$, is$55$$65$$75$$85$
gatecse
4.0k
points
gatecse
asked
Aug 7, 2019
Noise Pollution
gate2017-ce-2
noise-pollution
environmental-engineering
permissible-limits-of-noise-pollution
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–
0
votes
0
answers
5
GATE2017 CE-2-9
Following observations have ben made for the elevation and temperature to ascertain the stability of the atmosphere: $\begin{array}{|c|c|} \hline \text{Elevation (in m) } & \text{Temperature (in }^{\circ} \text{C)} \\ \hline 10 & 15.5 \\ \hline 60 & 15.0 \\ \hline 130 & 14.3 \\ \hline \end{array}$ The atmosphere is classified as Stable Unstable Neutral Inverse
Following observations have ben made for the elevation and temperature to ascertain the stability of the atmosphere:$$\begin{array}{|c|c|} \hline \text{Elevation (in m) }...
gatecse
4.0k
points
gatecse
asked
Aug 7, 2019
Air Pollution
gate2017-ce-2
environmental-engineering
air-pollution
atmosphere
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–
0
votes
0
answers
6
GATE2017 CE-2-10
The most important type of species involved in the degradation of organic matter in the case of activated sludge process is autotrophs heterotrophs prototrophs photo-autotrophs
The most important type of species involved in the degradation of organic matter in the case of activated sludge process isautotrophsheterotrophsprototrophsphoto-autotrop...
gatecse
4.0k
points
gatecse
asked
Aug 7, 2019
Water and Waste Water Quality and Treatment
gate2017-ce-2
water-and-waste-water-quality-and-treatment
environmental-engineering
sludge-disposal
activated-sludge-process
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–
0
votes
0
answers
7
GATE2017 CE-2-50
The composition of a municipal solid waste sample is given below: ... The difference between the energy content of the waste sample calculated on dry basis and as-discarded basis (in kJ/kg) would be _______
The composition of a municipal solid waste sample is given below:$\begin{array}{|l|c|c|c|} \hline \text{Component} & \text{Percent by} & \text{Moisture Content} & \text{E...
gatecse
4.0k
points
gatecse
asked
Aug 7, 2019
Municipal Solid Wastes
gate2017-ce-2
numerical-answers
municipal-solid-wastes
environmental-engineering
engineered-system-for-solid-waste-management
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–
0
votes
0
answers
8
GATE2017 CE-2-51
For a given water sample, the ratio between BOD$_{\text{5-day, 20}^{\circ} C}$ and the ultimate BOD is $0.68$. The value of the reaction rate constant $k$ (on base $e$) (in day$^{-1}$, up to two decimal places) is ________
For a given water sample, the ratio between BOD$_{\text{5-day, 20}^{\circ} C}$ and the ultimate BOD is $0.68$. The value of the reaction rate constant $k$ (on base $e$) (...
gatecse
4.0k
points
gatecse
asked
Aug 7, 2019
Water and Waste Water Quality and Treatment
gate2017-ce-2
numerical-answers
water-and-waste-water-quality-and-treatment
environmental-engineering
biological-oxygen-demand
+
–
0
votes
0
answers
9
GATE2017 CE-2-52
A municipal corporation is required to treat $1000 \: m^3/day$ of water. It is found that an overflow rate of $20 m/day$ will produce a satisfactory removal of the discrete suspended particles at a depth of $3 m$. The diameter (in meters, round to the nearest integer) of a circular settling tank designed for the removal of these particles would be ___________
A municipal corporation is required to treat $1000 \: m^3/day$ of water. It is found that an overflow rate of $20 m/day$ will produce a satisfactory removal of the discre...
gatecse
4.0k
points
gatecse
asked
Aug 7, 2019
Municipal Solid Wastes
gate2017-ce-2
numerical-answers
municipal-solid-waste
environmental-engineering
engineered-system-for-solid-waste-management
+
–
0
votes
0
answers
10
GATE2019 CE-1: 18
Which one of the following is a secondary pollutant? Ozone Carbon Monoxide Hydrocarbon Volatile Organic Carbon (VOC)
Which one of the following is a secondary pollutant?OzoneCarbon MonoxideHydrocarbonVolatile Organic Carbon (VOC)
Arjun
13.0k
points
Arjun
asked
Feb 14, 2019
Air Pollution
gate2019-ce-1
air-pollution
environmental-engineering
types-of-pollutants
+
–
0
votes
0
answers
11
GATE2019 CE-1: 34
Sedimentation basin in a water treatment plant is designed for a flow rate of $0.2 \: m^3/s$. The basin is rectangular with a length of $32 \: m$, width of $8 \:m $, and depth of $4 \: m$. Assume that the settling velocity of these particles is governed by ... diameter $25 \mu m$ (spherical and uniform), the removal efficiency of these particles is $51 \%$ $65 \%$ $78 \%$ $100 \%$
Sedimentation basin in a water treatment plant is designed for a flow rate of $0.2 \: m^3/s$. The basin is rectangular with a length of $32 \: m$, width of $8 \:m $, and ...
Arjun
13.0k
points
Arjun
asked
Feb 14, 2019
Water and Waste Water Quality and Treatment
gate2019-ce-1
water-and-waste-water
environmental-engineering
water-treatment-plant
sedimentation
+
–
0
votes
0
answers
12
GATE2019 CE-1: 40
A sample of air analysed at $0^{\circ} C$ and $1 \: atm$ pressure is reported to contain $0.02 \: ppm$ (parts per million) of $NO_2$. Assume the gram molecular mass of $NO_2$ as $46$ and its volume at $0^{\circ} C$ and $1 \: atm$ pressure as $22.4$ litres per mole. The equivalent $NO_2$ concentration (in microgram per cubic meter, round off to $2$ decimal places) would be ________
A sample of air analysed at $0^{\circ} C$ and $1 \: atm$ pressure is reported to contain $0.02 \: ppm$ (parts per million) of $NO_2$. Assume the gram molecular mass of $N...
Arjun
13.0k
points
Arjun
asked
Feb 14, 2019
Air Pollution
gate2019-ce-1
numerical-answers
environmental-engineering
air-pollution
air-quality-index
+
–
0
votes
0
answers
13
GATE2019 CE-1: 42
A wastewater is to be disinfected with $35 \: mg/L$ of chlorine to obtain $99 \%$ kill of micro-organisms. The number of micro-organisms remaining alive $(N_t)$ at time $t$, is modelled by $N_t=N_o e^{-kt}$, where $N_o$ is number of micro-microorganisms at $t=0$, ... $1.0 \: m$, respectively, the length of the tank (in $m$, round off to $2$ decimal places) is ________
A wastewater is to be disinfected with $35 \: mg/L$ of chlorine to obtain $99 \%$ kill of micro-organisms. The number of micro-organisms remaining alive $(N_t)$ at time $...
Arjun
13.0k
points
Arjun
asked
Feb 14, 2019
Water and Waste Water Quality and Treatment
gate2019-ce-1
numerical-answers
water-and-waste-water
environmental-engineering
wastewater-treatment-plant
chlorination-process
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–
0
votes
0
answers
14
GATE2019 CE-2: 9
Which one of the following options contains ONLY primary air pollutants? Hydrocarbons and nitrogen oxides Hydrocarbons and ozone Ozone and peroxyacetyl nitrate Nitrogen oxides and peroxyacetyl nitrate
Which one of the following options contains ONLY primary air pollutants?Hydrocarbons and nitrogen oxidesHydrocarbons and ozoneOzone and peroxyacetyl nitrateNitrogen oxide...
Arjun
13.0k
points
Arjun
asked
Feb 12, 2019
Air Pollution
gate2019-ce-2
air-pollution
environmental-engineering
types-of-pollutants
+
–
0
votes
0
answers
15
GATE2019 CE-2: 10
Analysis of a water sample revealed that the sample contains the following species. $CO_3^{2-}, Na^+, H^+, PO_4^{3-}, Al^{3+}, H_2CO_3, Cl^-, Ca^{2+}, Mg^{2+}, HCO_3^-, Fe^{2+}, OH^-$ ... $CO_3^{2-}, H^+, H_2CO_3, HCO_3^-$ $CO_3^{2-}, H_2CO_3, HCO_3^-, OH^-$ $H^+, H_2CO_3, HCO_3^-, OH^-$
Analysis of a water sample revealed that the sample contains the following species.$CO_3^{2-}, Na^+, H^+, PO_4^{3-}, Al^{3+}, H_2CO_3, Cl^-, Ca^{2+}, Mg^{2+}, HCO_3^-, Fe...
Arjun
13.0k
points
Arjun
asked
Feb 12, 2019
Water and Waste Water Quality and Treatment
gate2019-ce-2
water-and-waste-water
environmental-engineering
alkalinity
+
–
0
votes
0
answers
16
GATE2019 CE-2: 32
Chlorine is used as the disinfectant in a municipal water treatment plant. It achieves $50$ percent of disinfection efficiency measured in terms of killing the indicator microorganisms (E-Coli) in $3$ minutes. The minimum time required to achieve $99$ percent disinfection efficiency would be $9.93$ minutes $11.93$ minutes $19.93$ minutes $21.93$ minutes
Chlorine is used as the disinfectant in a municipal water treatment plant. It achieves $50$ percent of disinfection efficiency measured in terms of killing the indicator ...
Arjun
13.0k
points
Arjun
asked
Feb 12, 2019
Water and Waste Water Quality and Treatment
gate2019-ce-2
water-and-waste-water
environmental-engineering
water-treatment-plant
+
–
0
votes
0
answers
17
GATE2019 CE-2: 40
A water treatment plant treats $6000 \: m^3$ of water per day. As a part of the treatment process, discrete particles are required to be settled in a clarifier. A column test indicates that an overflow rate of $1.5 \: m$ per hour would produce the desired removal of ... of $3.0 \:m$. The volume of the required clarifier, (in $m^3$, round off to $1$ decimal place) would be ______
A water treatment plant treats $6000 \: m^3$ of water per day. As a part of the treatment process, discrete particles are required to be settled in a clarifier. A column ...
Arjun
13.0k
points
Arjun
asked
Feb 12, 2019
Water and Waste Water Quality and Treatment
gate2019-ce-2
numerical-answers
water-and-waste-water
environmental-engineering
water-treatment-plant
+
–
0
votes
0
answers
18
GATE2019 CE-2: 41
Raw municipal solid waste (MSW) collected from a city contains $70 \%$ decomposable material that can be converted to methane. The water content of the decomposable material is $35\%$. An elemental analysis of the decomposable material yields the following mass percent. ... The mass of methane produced (in grams, round off to $1$ decimal place) per kg of raw MSW will be _________
Raw municipal solid waste (MSW) collected from a city contains $70 \%$ decomposable material that can be converted to methane. The water content of the decomposable mater...
Arjun
13.0k
points
Arjun
asked
Feb 12, 2019
Municipal Solid Wastes
gate2019-ce-2
numerical-answers
municipal-solid-waste
environmental-engineering
engineered-systems-solid-waste-management
+
–
0
votes
0
answers
19
GATE2019 CE-2: 42
Consider the reactor shown in the figure. The flow rate through the reactor is $Q \: m^3/h$. The concentrations (in $mg/L$) of a compound in the influent and effluent are $C_0$ and $C$, respectively. The compound is degraded in the reactor following the first order ... $L_{\text{CMFR}}/L_{\text{PFR}}$ (round off to $2$ decimal places) is ____________
Consider the reactor shown in the figure. The flow rate through the reactor is $Q \: m^3/h$. The concentrations (in $mg/L$) of a compound in the influent and effluent are...
Arjun
13.0k
points
Arjun
asked
Feb 12, 2019
Water and Waste Water Quality and Treatment
gate2019-ce-2
numerical-answers
environmental-engineering
water-and-waste-water
effluent-discharge-standards
+
–
0
votes
0
answers
20
GATE2016-2-18
A water supply board is responsible for treating $1500 \:m^3/day$ of water. A settling column analysis indicates that an overflow rate of $20 \: m/day$ will produce satisfactory removal for a depth of $3.1 \: m$. It is decided to have two circular settling tanks in parallel. The required diameter (expressed in $m$) of the settling tank is __________
A water supply board is responsible for treating $1500 \:m^3/day$ of water. A settling column analysis indicates that an overflow rate of $20 \: m/day$ will produce satis...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Water and Waste Water Quality and Treatment
gate2016-ce-2
numerical-answers
environmental-engineering
water-and-waste-water-quality-and-treatment
drinking-water-treatment
+
–
0
votes
0
answers
21
GATE2016-2-19
The hardness of a ground water sample was found to be $420 \: mg/L$ as $CaCO_3$. A softener containing ion exchange resins was installed to reduce the total hardness to $75 \: mg/L$ as $CaCO_3$ before supplying to $4$ households. Each household gets treated water at ... $100\%$, the bypass flow rate (expressed in $L/day$) is _________
The hardness of a ground water sample was found to be $420 \: mg/L$ as $CaCO_3$. A softener containing ion exchange resins was installed to reduce the total hardness to $...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Water and Waste Water Quality and Treatment
gate2016-ce-2
numerical-answers
environmental-engineering
water-and-waste-water-quality-and-treatment
hardness-of-water
+
–
0
votes
0
answers
22
GATE2016-2-20
The sound pressure (expressed in $\mu P a$) of the faintest sound that a normal healthy individual can hear is $0.2$ $2$ $20$ $55$
The sound pressure (expressed in $\mu P a$) of the faintest sound that a normal healthy individual can hear is$0.2$$2$$20$$55$
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Noise Pollution
gate2016-ce-2
environmental-engineering
noise-pollution
impacts-of-noise
+
–
0
votes
0
answers
23
GATE2016-2-50
A sample of water has been analyzed for common ions and results are presented in the form of a bar diagram as shown. The non-carbonate hardness (expressed in mg/L as $CaCO_3$) of the sample is $40$ $165$ $195$ $205$
A sample of water has been analyzed for common ions and results are presented in the form of a bar diagram as shown.The non-carbonate hardness (expressed in mg/L as $CaCO...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Water and Waste Water Quality and Treatment
gate2016-ce-2
water-and-waste-water-quality-and-treatment
environmental-engineering
basics-of-water-quality-standards
+
–
0
votes
0
answers
24
GATE2016-2-51
A noise meter located at a distance of $30 \: m$ from a point source recorded $74 \: dB$. The reading at a distance of $60 \: m$ from the point source would be __________
A noise meter located at a distance of $30 \: m$ from a point source recorded $74 \: dB$. The reading at a distance of $60 \: m$ from the point source would be __________...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Noise Pollution
gate2016-ce-2
numerical-answers
noise-pollution
environmental-engineering
measurement-of-noise
+
–
0
votes
0
answers
25
GATE2016-2-52
For a wastewater sample, the three-day biochemical oxygen demand at incubation temperature of $20^{\circ}C$ (BOD$_{\text{3day}, 20^{\circ}C}$) is estimated as $200 mg/L$ ... in mg/L) of the wastewater at incubation temperature of $20^{\circ}C$ (BOD$_{\text{5day}, 20^{\circ}C}$) would be ________
For a wastewater sample, the three-day biochemical oxygen demand at incubation temperature of $20^{\circ}C$ (BOD$_{\text{3day}, 20^{\circ}C}$) is estimated as $200 mg/L$....
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Water and Waste Water Quality and Treatment
gate2016-ce-2
numerical-answers
water-and-waste-water-quality-and-treatment
environmental-engineering
wastewater
incubation-temperature
+
–
0
votes
0
answers
26
GATE2016-1-17
Pre-cursors to photochemical oxidants are $NO_X, \: VOC$s and sunlight $SO_2, \: CO_2$ and sunlight $H_2S, \: CO$ and sunlight $SO_2, \: NH_3$ and sunlight
Pre-cursors to photochemical oxidants are$NO_X, \: VOC$s and sunlight$SO_2, \: CO_2$ and sunlight$H_2S, \: CO$ and sunlight$SO_2, \: NH_3$ and sunlight
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Air Pollution
gate2016-ce-1
environmental-engineering
air-quality-standards-index-and-limits
air-pollution
+
–
0
votes
0
answers
27
GATE2016-1-19
It was decided to construct a fabric filter, using bags of $0.45$ m diameter and $7.5$ m long, for removing industrial stack gas containing particulates. The expected rate of airflow into the filter is $10 \: m^3/s$. If the filtering velocity is $2.0$ m/min, the minimum number of bags (rounded to nearest higher integer) required for continuous cleaning operation is $27$ $29$ $31$ $32$
It was decided to construct a fabric filter, using bags of $0.45$ m diameter and $7.5$ m long, for removing industrial stack gas containing particulates. The expected rat...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Air Pollution
gate2016-ce-1
environmental-engineering
air-pollution
air-pollution-control
+
–
0
votes
0
answers
28
GATE2016-1-20
Match the items in Group - I with those in Group - II and choose the right combination. ... $P - 1; \: Q - 4; \: R - 2; \: S - 3$
Match the items in Group – I with those in Group – II and choose the right combination.$$\begin{array}{llll} {} & \underline{\text{Group – I}} & {} & \underline{\...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Water and Waste Water Quality and Treatment
gate2016-ce-1
water-and-waste-water-quality-and-treatment
environmental-engineering
activated-sludge-process
+
–
0
votes
0
answers
29
GATE2016-1-50
Effluent from an industry ‘A’ has a pH of $4.2$. The effluent from another industry ‘B’ has double the hydroxyl (OH) ion concentration than the effluent from industry ‘A’. pH of effluent from the industry ‘B’ will be ______
Effluent from an industry ‘A’ has a pH of $4.2$. The effluent from another industry ‘B’ has double the hydroxyl (OH) ion concentration than the effluent from indu...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Water and Waste Water Quality and Treatment
gate2016-ce-1
numerical-answers
water-and-waste-water-quality-and-treatment
environmental-engineering
effluent-discharge-standards
+
–
0
votes
0
answers
30
GATE2016-1-51
An electrostatic precipitator (ESP) with $5600\:m^2$ of collector plate area is $96$ percent efficient in treating $185\:m^3/s$ of flue gas from a $200$ MW thermal power plant. It was found that in order to achieve $97$ percent efficiency, the collector plate ... $99$ percent, the ESP collector plate area (expressed in $m^2$) would be ______
An electrostatic precipitator (ESP) with $5600\:m^2$ of collector plate area is $96$ percent efficient in treating $185\:m^3/s$ of flue gas from a $200$ MW thermal power ...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Air Pollution
gate2016-ce-1
numerical-answers
electrostatic-precipitator-collector
environmental-engineering
air-pollution
air-pollution-control
+
–
0
votes
0
answers
31
GATE2016-1-52
The $2$-day and $4$-day BOD values of a sewage sample are $100$ mg/L and $155$ mg/L, respectively. The value of BOD rate constant (expressed in per day) is __________
The $2$-day and $4$-day BOD values of a sewage sample are $100$ mg/L and $155$ mg/L, respectively. The value of BOD rate constant (expressed in per day) is __________
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 27, 2018
Water and Waste Water Quality and Treatment
gate2016-ce-1
numerical-answers
environmental-engineering
water-and-waste-water-quality-and-treatment
sewage
bod-rate-constant
+
–
0
votes
0
answers
32
GATE2017 CE-1: 14
The wastewater from a city, containing a high concentration of biodegradable organics, is being steadily discharged into a flowing river at a location S. If the rate of aeration of the river water is lower than the rate of degradation of the organics, then the ... the location S. remains constant all along the length of the river. is lowest at a point downstream of the location S.
The wastewater from a city, containing a high concentration of biodegradable organics, is being steadily discharged into a flowing river at a location S. If the rate of a...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 26, 2018
Water and Waste Water Quality and Treatment
gate2017-ce-1
environmental-engineering
water-and-waste-water-quality-and-treatment
biodegradation
+
–
0
votes
0
answers
33
GATE2017 CE-1: 52
The equivalent sound power level (in dB) of the four sources with the noise levels of $60$ dB, $69$ dB, $70$ dB and $79$ dB is ______
The equivalent sound power level (in dB) of the four sources with the noise levels of $60$ dB, $69$ dB, $70$ dB and $79$ dB is ______
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 26, 2018
Noise Pollution
gate2017-ce-1
numerical-answers
noise-pollution
environmental-engineering
measurement-of-noise
+
–
0
votes
0
answers
34
GATE2017 CE-1: 53
The spherical grit particles, having a radius of $0.01$ mm and specific gravity of $3.0$, need to be separated in a settling chamber. It is given that $g=9.81 \: m/s^2$ the density of the liquid in the settling chamber $=1000 \: kg/m^3$ the ... settling chamber $=10^{-6} \: m^2/s$ Assuming laminar conditions, the settling velocity (in mm/s, up to one decimal place) is __________
The spherical grit particles, having a radius of $0.01$ mm and specific gravity of $3.0$, need to be separated in a settling chamber. It is given that$g=9.81 \: m/s^2$the...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 26, 2018
Fluid Mechanics
gate2017-ce-1
numerical-answers
fluid-mechanics
laminar-conditions
environmental-engineering
+
–
0
votes
0
answers
35
GATE2017 CE-1: 54
Two wastewater streams A and B, having an identical ultimate BOD are getting mixed to form the stream C. The temperature of the stream A is $20^{\circ}C$ and the temperature of the stream C is $10^{\circ}C$. It is given that the $5$-day BOD of the stream A measured ... The $5-$day BOD (in mg\I, up to one decimal place ) of the stream C, calculated at $10^{\circ} C$, is _________
Two wastewater streams A and B, having an identical ultimate BOD are getting mixed to form the stream C. The temperature of the stream A is $20^{\circ}C$ and the temperat...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 26, 2018
Water and Waste Water Quality and Treatment
gate2017-ce-1
numerical-answers
water-and-waste-water-quality-and-treatment
environmental-engineering
biological-oxygen-demand
+
–
1
votes
1
answer
36
GATE2017 CE-1: 55
The wastewater having an organic concentration of $54$ mg/l is flowing at a steady rate of $0.8 \: m^3/day$ through a detention tank of dimensions $2m \times 4 m \times 2 m$. If the contents of the tank are well mixed and the decay constant $0.1$ per day, the outlet concentration (in mg/l, up to one decimal place) is _________
The wastewater having an organic concentration of $54$ mg/l is flowing at a steady rate of $0.8 \: m^3/day$ through a detention tank of dimensions $2m \times 4 m \times 2...
Milicevic3306
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Milicevic3306
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Mar 26, 2018
Water and Waste Water Quality and Treatment
gate2017-ce-1
numerical-answers
steady-rate
water-and-waste-water-quality-and-treatment
environmental-engineering
+
–
0
votes
0
answers
37
GATE2015-2-21
$SO_2$ and $CO$ adversely affect oxygen carrying capacity of blood and functioning of lungs respectively functioning of the respiratory system and brain respectively functioning of the respiratory system and oxygen carrying capacity of blood respectively functioning of air passages and chest respectively
$SO_2$ and $CO$ adversely affectoxygen carrying capacity of blood and functioning of lungs respectivelyfunctioning of the respiratory system and brain respectivelyfunctio...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 26, 2018
Air Pollution
gate2015-ce-2
air-pollution
environmental-engineering
+
–
0
votes
0
answers
38
GATE2015-2-47
A landfill is to be designed to serve a population of $200000$ for a period of $25$ years. The solid waste (SW) generation is $2$ kg/person/day. The density of the un-compacted SW is $100 \: kg/m^3$ and a compaction ratio of $4$ is suggested. The ratio of compacted fill (i.e., SW+cover) to compacted SW is $1.5$. The landfill volume (in $million \: m^3$) required is _________.
A landfill is to be designed to serve a population of $200000$ for a period of $25$ years. The solid waste (SW) generation is $2$ kg/person/day. The density of the un-com...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 26, 2018
Municipal Solid Wastes
gate2015-ce-2
numerical-answers
municipal-solid-waste
environmental-engineering
engineered-system-for-solid-waste-management
+
–
0
votes
0
answers
39
GATE2015-2-48
A water treatment plant of capacity, $1 \: m^3/s$ has filter boxed of dimensions $6 \; m \times 10 \: m$. Loading rate to the filters is $120 \: m^3/day/m^2$. When two of the filters are out of service for back washing, the loading rate (in $m^3/day/m^2$) is _________.
A water treatment plant of capacity, $1 \: m^3/s$ has filter boxed of dimensions $6 \; m \times 10 \: m$. Loading rate to the filters is $120 \: m^3/day/m^2$. When two of...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 26, 2018
Water and Waste Water Quality and Treatment
gate2015-ce-2
numerical-answers
water-and-waste-water
environmental-engineering
water-treatment-plant
+
–
0
votes
0
answers
40
GATE2015-2-49
Ultimate BOD of a river water sample is $20$ mg/L. BOD rate constant (natural log) is $0.15 \: day^{-1}$. The respective values of BOD (in $\%$) exerted and remaining after $7$ days are: $45$ and $55$ $55$ and $45$ $65$ and $35$ $75$ and $25$
Ultimate BOD of a river water sample is $20$ mg/L. BOD rate constant (natural log) is $0.15 \: day^{-1}$. The respective values of BOD (in $\%$) exerted and remaining aft...
Milicevic3306
11.9k
points
Milicevic3306
asked
Mar 26, 2018
Environmental Engineering
gate2015-ce-2
environmental-engineering
bod-rate-constant
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–
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