Chlorides are estimated by titration with a standard silver nitrate solution by using _______ as an indicator.
1. Potassium manganate
2.Potassium chloride
3.Potassium chromate
4.Potassium dichromate
If in a city, the maximum daily draft is 25MLD, fire draft is 35MLD and maximum hourly draft is 40MLD, what is the coincident draft?
1.60MLD
2.40MLD
3.25MLD
4.35MLD
If the annual average hourly demand of the city is 10000m3, what is the maximum hourly consumption?
1.2700 m3
2.27000 m3
3.270000 m3
4.2700000 m3
In the lower layers of atmosphere, what range of wavelengths of light is predominant?
1.Between 100-300 nm
2.Less than 100 nm
3.Greater than 300 nm
4.All wavelengths are equally present
In which method of determining total hardness of water is based on the premise that hardness producing substance react with soap and form insoluble compounds before lather is produced?
1.Clark’s method
2. Hehner’s method
3.Versenate method
4.EDTA method
In which method of population forecast, percentage increase in population from decade to decade is assumed constant?
1.Arithmetical increase method
2.Geometrical increase method
3. Incremental increase method
4.Decreased rate of growth method
In which type of water demand, minimum average consumption of water takes place?
1.Domestic water demand
2.Industrial water demand
3.Institutional and commercial water demand
4.Fire demand
The maximum permissible limit for suspended solids is ____________
1.10 mg/l
2.20 mg/l
3.30 mg/l
4. 40 mg/l
The range for threshold odour number is __________
1.0-3
2.1-5
3.1-3
4. 0-5
What does the phrase “anthropogenic CO2 emissions†mean?
1.Natural CO2 emissions
2.Human made CO2 emissions
3.Industrial CO2 emissions
4.All of the mentioned
What is the design period for the water treatment unit?
1.10 years
2.15 years
3.20 years
4.30 years
Which of the following gas is not colorless?
1.SO3
2.Pb
3.NO
4.O3
Which of the following is not a part of photochemical smog?
1.SPM
2.PAN
3.O3
4.NO2
Which of the following is not commonly used as a filter material in the treatment of water?
1.Garnet sand
2.Crushed rock
3.Sand
4.Anthracite
1 TCU (True Color Unit) is equivalent to _____
1.The color produced by 1 g of platinum cobalt
2.The color produced by 1 mg of platinum cobalt
3.The color produced by 1 mg of platinum cobalt in 1L of distilled water
4.The color produced by 1 mg of platinum cobalt in 1mL of distilled water
Among the given engineers, who is known as the first female environmental engineer?
1.Ellen Swallow Richards
2.Miss Ellen Henrietta
3.Catherine Anselm Gleason
4.Elsie Eaves
Consider the following statements. i. The arithmetical increase method is suitable for new cities ii. The decreasing growth rate method is used where the rate of growth shows a downward pattern iii. The geometrical increase method is used for older cities Which of the following above statements is/are correct?
1.i, ii, iii
2.i and iii
3.Only ii
4.ii and iii
Environmental science is defined by which of the following statements?
1.study of the interactions between the environment’s and humans only
2.study of the interactions between the environment’s and physical components
3.study of the interactions between the environment’s and chemical components
4.study of the interactions between the environment’s physical, chemical, and biological components
Identify the correct relation between the following?
1.Dissolved solid = Total solid + Suspended solid
2.Dissolved solid = Total solid – Suspended solid
3. Total solid = Dissolved solid / Suspended solid
4.Dissolved solid = Suspended solid – Total solid
In which method of population forecasting, increase in population from decade to decade is assumed constant?
1. a) Arithmetical increase method
2.Geometrical increase metho
3.Incremental increase method
4.Decreased rate of growth method
In which of the following process earthworms decompose biodegradable solid waste?
1.Composting
2.Land fills
3.Shredding
4.Vermi-composting
In which of the following units, design period is maximized?
1.Distribution system
2.Demand reservoir
3.Water treatment unit
4.Pipe mains
Logistic method is also called as _______
1.Arithmetical increase method
2.Geometrical increase method
3.Incremental increase method
4.Decreased rate of growth method
One degree of hardness is equivalent to ___ ppm.
1. 2
2.1
3.10
4.100
One JTU is equivalent to turbidity produced by __________
1.1mg of fine silica dissolved in 1L of distilled water
2.1g of fine silica dissolved in 1L of distilled water
3.1g of fine silica dissolved in 1ml of distilled water
4. 1mg of fine silica dissolved in 1ml of distilled water
Suspended solids are measured by which of the following?
1.Turbidity rod
2.Gravimetric test
3.Chromatography
4.Jackson’s turbidity meter
The average consumption of water required in factories in lpcd is ___________
1.10-15
2.20-30
3.30-45
4.70-80
The average quantity of water (in lpcd) required for domestic purposes according to IS code is ________
1.100
2.120
3.70
4.135
The size of suspended solids lies in the range of ________
1.10-3 – 10-6 mm
2.103 – 106 mm
3.10-1 – 10-3 mm
4.101 – 103 mm
Water lost in theft and waste contributes to how much % of total consumption?
1.5
2.10
3.15
4.20
What are the factors affecting per capita demand?
1.Size of city
2.Size of city, habit of people
3.Cost of water, quality of water, size of city
4.Cost of water, quality of water, size of city, habit of people
What is the concentration of H+ ions in moles/L in water if the pOH value is 6?
1.10-6
2.10-7
3.10-8
4.10-9
What is the design discharge for intake structures?
1.Maximum daily demand
2.Maximum hourly demand
3.Maximum weekly demand
4.Average daily demand
What is the expression used for population forecasting by the arithmetical increase method?
1. PO (1 + R/100)n
2.PO + n*x
3.PO + n*x + ( n(n+1)/2 )*y
4.PO – n*x
What is the expression used for population forecasting by the incremental increase method?
1.PO (1 + R/100)n
2.PO + n*x
3.PO + n*x + (n (n+1) /2) *y
4.PO – n*x
What is the fire demand of the city of 1lakh population by Buston’s formula?
1.5663
2.56630
3.566300
4.5663000
What is the indicator used in EDTA method?
1.Potassium chromate
2.Potassium dichromate
3.Potassium chloride
4.Erio chrome, black T
What is the indicator used in EDTA method?
1.Potassium chromate
2.Potassium dichromate
3.Potassium chloride
4.Erio chrome, black T
What is the minimum water pressure available at fire hydrants?
1.80-100kN/m²
2.100-150kN/m²
3.40-60kN/m²
4.150-200kN/m²
When Environmental Lapse Rate (ELR) is greater than Adiabatic Lapse Rate (ALR), then which of the following occurs?
1.Super adiabatic lapse rate
2.Neutral lapse rate
3.Adiabatic lapse rate
4.Sub adiabatic lapse rate
When environmental Lapse Rate (ELR) is less is than Adiabatic Lapse Rate (ALR), then which of the following occurs?
1.Super adiabatic lapse rate
2.Neutral lapse rate
3.Adiabatic lapse rate
4.Sub adiabatic lapse rate
Which is the correct statement regarding per capita demand?
1.Daily water required by an individual
2.Water required for various purposes by a person
3.Water required by an individual in a year
4.Annual average amount of daily water required by one person
Which is the first zone of purification in a sand bed?
1.Heterotrophic zone
2.Schmutzdecke zone
3.Electrolytic zone
4.Autotrophic zone
Which method is suitable if the growth rate is decreasing and the population is reaching towards saturation?
1.Arithmetical increase method
2.Graphical comparison method
3.Zoning method
4.Decreased rate of growth method
Which method is used to measure the color of water?
1.Gravimetric analysis
2.Chromatography
3.Tintometer method
4.Hydrometer analysis
Which method of population forecast is suitable when extension is required for small duration and past record is available for long duration?
1.Graphical comparison method
2.Graphical extension method
3.Logistic curve method
4.Zoning method
Which of the following air pollution control device has maximum efficiency?
1.Spray tower
2.Wet cyclonic scrubber
3.Dynamic precipitator
4.Electrostatic precipitator
Which of the following compounds was earlier produced for the utility of transformers?
1.PCB
2.TCDD
3.PCDF
4.PDD
Which of the following device is used to prevent the clogging of sewer pipes?
1. Drop manhole
2.Storm regulators
3.Flushing tank
4.Lamp hole
Which of the following factor does not effect the dry weather flow?
1.Infiltration of ground water
2.Population growth
3.Rate of water supply
4.Temperature conditions
Which of the following flow is also called sanitary sewage?
1.Nonuniform flow
2.Uniform flow
3.Dry weather flow
4.Storm weather flow
Which of the following gas is released when alum is added to water? a)
1.Ca (OH)3
2.CO2
3.Al (OH)3
4.CaSO4
Which of the following greenhouse gas is contributed by cattle farming?
1.Carbon monoxide
2.Nitrous oxide
3.Methane
4.All of the mentioned
Which of the following is a renewable source of energy?
1.Ocean currents
2.Solar energy
3.Biomass
4.All of the above
Which of the following is an advantage of a separate water carriage system?
1.The more uniform character of sewage
2.Two sets of sewer are used
3.Get choked easily
4.Difficult to clean the sewer
Which of the following is biodegradable waste?
1.Paper
2.Food waste
3.Polythene bags
4.Synthetic fiber
Which of the following is NOT a primary pollutant?
1.Oxygen
2.Ground-level ozone
3.Carbon monoxide
4.Carbon dioxide
Which of the following is/are types of pollution that affect the environment?
1.Air pollution
2.Water pollution
3.Land pollution
4.All of the mentioned
Which of the following plants is extremely sensitive towards sulphur dioxide?
1.Tomato
2.Onion
3.Potato
4.Corn
Which of the following radiations of the sun do greenhouse gases trap?
1.Infrared radiations
2.UV radiations
3.Visible radiations
4.All the radiations
Which of the following statement is correct?
1.Rich class consumes less water
2.Intermittent water supplies leads to less water consumption
3.Loss of water is more if the pressure in the distribution system is less
4.Water consumption is less in flush system
Which of the following statement is wrong regarding permanent hardness?
1.It is also called carbonate hardness
2.It is due to the presence of sulfates, chlorides and nitrates of calcium and magnesium
3.It cannot be removed by boiling
4.It requires special methods of water softening to get removed
Which of the following statements define environmental chemistry?
1. study of chemical reactions that occur in water, air, land, biological habitats, and human activities
2.study of chemical reactions that occur in water, air, land, and biological habitats only
3.study of chemical reactions that occur in water, air, and land only
4.None of the above
Which of the following statements define Environmental Engineering?
1.Creation of procedures and infrastructure for water delivery
2.Waste disposal
3.Pollution control of various kinds
4.All of the mentioned
Which of the following statements means water vapor?
1. Water vapor is the gaseous phase of water
2.Water vapor is the liquid phase of water
3.Water vapor is the solid phase of water
4.All of the mentioned
Which of the following type of pollution is Cultural eutrophication?
1.Noise pollution
2.Thermal pollution
3.Soil pollution
4.Water pollution
Which of the following water treatment process is done after filtration of water?
1.Secondary sedimentation
2.Flocculation
3.Primary sedimentation
4.Disinfection
Which of the mentioned device are used for removing vapour phase/gaseous pollutants?
1. Thermal oxidisers
2.Absorption towers
3.Catalytic converters
4.All of the mentioned
Which process of water treatment is done to avoid floating debris, branches, trees, or other large particles suspended in water?
1.Primary sedimentation
2.Secondary sedimentation
3.Screening
4.Aeration
Why carbon dioxide is called a greenhouse gas?
1.Because they absorb heat
2.Because they absorb moisture
3.Because they absorb oxygen
4.Because they absorb hydrogen