Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes (A) Foaming(B) Odour nuisances(C) Undesirable plant growth(D) Turbidity

Presence of nitrogen and phosphorous in waste water discharged into
lakes and ponds causes
(A) Foaming
(B) Odour nuisances
(C) Undesirable plant growth
(D) Turbidity
by

1 Answer

Answer :

(C) Undesirable plant growth
by

Related questions

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Description : Assertion A. : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable. Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other ... of A C. A is true but R is false D. A is false but R is true

Last Answer : ANS: A

Presence of bacteria in potable (drinking) water causes (A) Turbidity (B) Disease (C) Bad odour (D) Bad taste & colour

Description : Presence of bacteria in potable (drinking) water causes (A) Turbidity (B) Disease (C) Bad odour (D) Bad taste & colour

Last Answer : (B) Disease

The main use of activated carbon in water treatment is to control (A) Bacterial growth (B) Taste and odour (C) Turbidity (D) None of these

Description : The main use of activated carbon in water treatment is to control (A) Bacterial growth (B) Taste and odour (C) Turbidity (D) None of these

Last Answer : (B) Taste and odour

Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)

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Presence of phosphorous in metallurgical coal (A) Is not undesirable (B) Reduces its calorific value (C) Badly affects the quality of steel

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Presence of soluble organics in polluted water causes (A) Undesirable plants growth (B) Depletion of oxygen (C) Fire hazards (D) Explosion hazards

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Removal of __________ results from the disinfection of water. (A) Turbidity(B) Odour(C) Hardness(D) Bacteria

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Last Answer : (C) Minimises its corrosiveness

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Last Answer : (A) Disinfection and control of taste & odour

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Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause (A) Explosion(B) Non biodegradable foam(C) Undesirable plant growth(D) Corrosion

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Lime and soda ash are added to water to remove (A) Bicarbonates & sulphates of calcium and magnesium (B) Undesirable taste and odour (C) Bacteria (D) Its corrosiveness

Description : Lime and soda ash are added to water to remove (A) Bicarbonates & sulphates of calcium and magnesium (B) Undesirable taste and odour (C) Bacteria (D) Its corrosiveness

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Disinfection of drinking water, is done to remove (A) Odour (B) Bacterias (C) Turbidity (D) Colour

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Filtration of water is done to remove (A) Colour (B) Odour (C) Turbidity (D) Pathogenic bacteria

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Disinfection of drinking water is done to remove (A) Turbidity (B) Odour (C) Colour (D) Bacterias

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Last Answer : (D) Bacterias

Hard water for public water supply is discarded because (A) It consumes more soap (B) It contains lot of turbidity (C) It contains pathogenic bacterias (D) It possesses bad taste and odour

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Aeration of water is done to remove (A) Odour (B) Colour (C) Bacterias (D) Turbidity

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Last Answer : Glaciers

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Description : What is the difference between streams and rivers and ponds and lakes?

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Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances. (A) Radioactive (B) Organic (C) Inorganic (D) None of these

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Turbidity of water is an indication of the presence of (A) Suspended inorganic matter (B) Dissolved solids (C) Floating solids (D) Dissolved gases

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Are you a 'saint' (question about nuisances)?

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Which nutrient in fertiliser makes the plant stems stronger and increases branching? (A) Nitrogen (B) Phosphorous (C) Potassium (D) Calcium

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Hardness of water is caused by (A) Presence of soap lather (B) Presence of chlorides and sulphates of sodium and potassium (C) Presence of bicarbonates, sulphates or chlorides of calcium and magnesium (D) Turbidity

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How Many home cleaning products contain phosphates. If wastewater containing excess phosphates drains into a pond the phosphates encourage the growth of algae. How might this change in a pond's ecosys?

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As the age is increasing you become anxious for your old age. What would you do to eliminate the anxiety? Options: A) Timely preparation for the age to avoid the tensions B) Involvement in other activities to divert your attention C) Learn yoga to control undesirable emotions D) You don't waste present while thinking for future unnecessarily

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Last Answer : A) Timely preparation for the age to avoid the tensions 

Red phosphorous is changed into white phosphorous by (A) Heating in presence of light (B) Melting under pressure (C) Vaporisation followed by condensation (D) None of these

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Pick out the wrong statement. (A) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water (B) Apatite is the principal material present in phosphate rock which is chemically Ca10 (PO4 )6 (F, Cl, OH) (C) Urea is more hygroscopic than ammonium nitrate (D) Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound fo

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The effect of corona can be detected by (a) presence of ozone detected by odour (b) hissing sound (c) faint luminous glow of bluish colour (d) all of the above

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Last Answer : (d) all of the above

The presence of ozone due to corona is harmful because it (a) reduces power factor (b) corrodes the material (c) gives odour (d) transfer energy to the ground (e) none of the above

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If water smells bad, then that odour can be removed by adding – (1) alum (2) bleach (3) activated carbon (4) deactivated nitrogen

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If water smells bad, then that odour can be removed by adding - (1) alum (2) bleach (3) activated carbon (4) deactivated nitrogen

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Last Answer : (3) activated carbon Explanation: Adding powdered activated carbon to water or using of granular activated carbon (GAC) in the water filter can remove bad taste and foulodor.

If water smells bad, then that odour can be removed by adding (1) alum (2) bleach (3) activated carbon (4) deactivated nitrogen

Description : If water smells bad, then that odour can be removed by adding (1) alum (2) bleach (3) activated carbon (4) deactivated nitrogen

Last Answer : activated carbon

Presence of high phosphorous in cast iron increases its (A) Fluidity (B) Melting point (C) Shrinkage (D) Tensile strength

Description : Presence of high phosphorous in cast iron increases its (A) Fluidity (B) Melting point (C) Shrinkage (D) Tensile strength

Last Answer : (A) Fluidity

Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the (A) Presence of an inert atmosphere (B) Presence of a reducing atmosphere (C) Absence of air (D) Presence of an oxidising atmosphere

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Last Answer : (C) Absence of air

The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element. (A) Silicon (B) Carbon (C) Phosphorous (D) Chromium

Description : The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element. (A) Silicon (B) Carbon (C) Phosphorous (D) Chromium

Last Answer : Option B

Pick out the wrong statement. (A) Cold cracking of a weld is due to the presence of hydrogen gas in the weld (B) True stress is given by, σ = σE (1 + εE), where σE and εE are engineering stress and engineering strain respectively (C) Phosphorous can be easily recovered in the iron blast furnace (D) High residual stress at the surface is beneficial for fatigue properties of a material

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Last Answer : Option C

Direct methods to measure bacterial growth would include all the following except the a. total bacterial count b. microscopic count c. turbidity measurements d. most probable number

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Last Answer : c. turbidity measurements