MCQs on Water Pollution and Noise Pollution
MCQs-based questions and answers on Water Pollution and Noise Pollution.
The minimum value of DO required for water to be pure is:
- 1 ppm
- 2 ppm
- 3 ppm
- 4 ppm
Question Answer: 4 ppm
Which value of COD will indicate more polluted water?
- Low value
- Both values
- Higher value
- All of these
Question Answer: Higher value
Biodegradable pollutant is:
- Plastic
- Sewage
- Asbestos
- Mercury
Question Answer: Sewage
Water is often treated with chlorine to:
- Increase oxygen content
- Remove suspended particles
- Remove hardness
- Kill germs
Question Answer: Kill germs
Permanent hardness of water is due to
- Sulphate of Ca
- Sulphate of Mg
- Chloride of Ca
- All of these
Question Answer: All of these
Temporary hard water is softened on industrial scale by adding
- Ca(OH)2
- Mg(OH)2
- KOH
- NaOH
Question Answer: Ca(OH)2
Permanent hard water is softened by addition of
- MgCO3
- CaCO3
- Na2CO3
- BaCO3
Question Answer: Na2CO3
Water pollution is due to
- Industrial effluents
- Swages and other wastes
- Agricultural discharges
- All of these
Question Answer: All of these
Water is often treated with chlorine to
- Kill germs
- Increase oxygen content
- Cause sedimentation
- Remove insoluble impurities
Question Answer: Kill germs
The presence of which in drinking water is responsible for mottling of teeth?
- Mercury
- Fluorine
- Chlorine
- Iodine
Question Answer: Fluorine
Which water require zero hardness?
- Boiler feed water
- Dyeing water
- Paper will water
- Laundry water
Question Answer: Laundry water
Which process is not physical in nature?
- Mixing
- Activated sludge process
- Sedimentation
- Flocculation
Question Answer: Activated sludge process
Which is a not physical characteristic of water?
- Smell
- Odor
- Chlorine contents
- Color
Question Answer: Chlorine contents
Which is a not chemical characteristic of water?
- pH
- Color
- BOD
- COD
Question Answer: Color
Which is a not biological characteristic of water?
- Animals
- Viruses
- Plants
- COD
Question Answer: COD
Which compounds has fishing odor?
- Amines
- Organic sulphides
- Ammonia
- Carboxylic acids
Question Answer: Amines
Which chemical strong 28. Which of oxidizing agent is aidful and used in COD test?
- KCI
- K₂Cr₂O7
- CH3COOH
- H₂SO4
Question Answer: K₂Cr₂O7
Ground water in threatened with pollution from which kind of wastes?
- Domestic wastes
- Agricultural wastes
- Industrial wastes
- All of these
Question Answer: All of these
Which statement is not true regarding harmful effects of ground water pollution?
- It causes lungs cancer
- It aids to prevent epidemics
- It causes typhoid, dysentery and diarrhea
- It causes jaundice
Question Answer: It aids to prevent epidemics
Which statement is not related with the effect of thermal pollution?
- Reduction in DO
- Increase in BOD
- Decrease in BOD
- Excessive eutrophication
Question Answer: Decrease in BOD
Which statement is not true regarding radioactive pollutants?
- Carcinoma and breast cancer
- Leukemia.
- Somatic and generic disorder
- Increases biological immune system
Question Answer: Increases biological immune system
Which techniques are aidful and used for minimizing water pollution?
- Stabilization of ecosystem
- Waste treatment
- Recharge of the waste
- All of these
Question Answer: All of these
The expected specific waste of food industry
- Meats
- Bones
- Fats or oil
- All of these
Question Answer: All of these
The expected specific wastes of textile industry is
- Dyes
- Fiber residue
- Cloth residue
- All of these
Question Answer: All of these
Which of the following is the expected specific waste of paper and allied products industry?
- Chemicals
- Inks
- Paper and fiber residues
- All of these
Question Answer: All of these
Which disposal method is aidful and used for municipal wastes?
- Recycling
- Composting
- Compaction
- All of these
Question Answer: All of these
Which of the following is the Chief source of water and soil pollution?
- Mining of ores
- Agro-industry
- Thermal power plant
- All of these
Question Answer: All of these
Eutrophication is process which involves ______
- Depletion of ozone layer
- Decrease in the concentration of dissolved oxygen in water by algae
- Increase in the concentration of ozone in water
- Decrease in the level of SO2 in air
Decrease in the concentration of dissolved oxygen in water by algae
Which cause pollution?
- Smoke/fly ash
- Automobile exhausts
- Silt and pesticides
- Aero planes
Question Answer: Silt and pesticides
Disease caused by eating fish found in water contaminated with industrial waste having mercury is
- Minamata disease
- Bright’s disease
- Hashimoto’s disease
- Osteosclerosis
Question Answer: Minamata disease
Maximum desirable concentration of fluorides according to international standard is
- 10-100 ppm
- 100-200 ppm
- 1 ppm
- 10-20 ppm
Question Answer: 1 ppm
Fish die in water bodies polluted by sewage due to Which of the following?
- smell
- Clogging of gills by silt
- Reduction in dissolved oxygen
- Pathogens
Question Answer: Pathogens
Drained sewage has B.O.D.
- Equal to that of water
- Less than that of water
- More than that of water
- None of these
Question Answer: More than that of water
Which is a mode of controlling pollution in big cities?
- Broader roads and shifting of factories out of the residential areas
- Proper disposal of organic wastes, sewage and industrial effluents
- Cleanliness and less use of insecticides
- All of these
Question Answer: All of these
Domestic waste mostly constitutes
- Biodegradable pollution
- Non-biodegradable pollution
- Effluents
- Air pollution
Question Answer: Biodegradable pollution
Detergents are known to pollute rivers and water ways. However, detergents can be made biodegradable and pollution free by taking
- Cyclic hydrocarbon chain
- Unbranched hydrocarbon chain
- Shorter hydrocarbon chain
- Hydrocarbon with more branching
Question Answer: Unbranched hydrocarbon chain
Which factors aid to measure quality of water?
- BOD
- DO
- COD
- All of these
Question Answer: All of these
In the purification of portable water the coagulant aidful and used is:
- Copper sulphate
- Nickel sulphate
- Alum
- Barium sulphate
Question Answer: Alum
Which statements is not related with principal requisites of water for industrial purposes?
- It should be hard as possible and does not contain nitrate
- It contains less quantity of line
- It should not contain iron
- It should be pure and cool
Question Answer: It contains less quantity of line
Which of the following is the water that easily forms a lather of films and froths when agitated with a soap solution?
- Hard water
- Heavy water
- Soft water
- Distilled water
Question Answer: Soft water
Which of the following is the water that does not form a lather of films when agitated with a soap solution?
- Deionized water
- Soft water
- Heavy water
D Hard water
Question Answer: Hard water
BOD refers to:
- Total oxygen demand of biosphere
- Biological oxygen deficit
- Biological oxygen demand of polluted water
- None of these
Question Answer: Biological oxygen demand of polluted water
Phosphate pollution is caused by:
- Weathering of phosphate rocks only
- Sewage and agricultural fertilizers
- Phosphate rocks and sewage
- Carbon dioxide dissolved in water
Question Answer: Sewage and agricultural fertilizers
Which substance not present in acid rain?
- Acetic acid
- Nitric acid
- Sulphurous acid
- Sulphuric acid
Question Answer: Acetic acid
Water pollution is mainly due to Which?
- Sulphur dioxide
- Carbon dioxide
- Industrial effluents
- Oxygen
Question Answer: Industrial Effluents
COD refers to:
- Catalyzed oxidation of diamond
- Chemistry of diamonds
- Chemical oxygen demand
- Catalyzed oxidation of dissolved salts.
Question Answer: Chemical oxygen demand
Spraying of DDT produces pollution of
- Air, water and soil
- Air and water
- Air and soil
- Air
Question Answer: Air, water and soil
Fluorosis, the bone disease, is caused by the presence of:
- Pesticides in water
- carbon monoxide in air
- Fluorides in water
- sulphur dioxide in air
Question Answer: Fluorides in water
The hardness of water is because of the presence of dissolved soluble salts of ________.
- Iron
- Magnesium
- Calcium
- All of these
Question Answer: All of these
Which statement is not true regarding hardness of water?
- It is due to soluble salts of Ca
- It is due to soluble salts of Na
- It is due to soluble salts of Mg
- It is due to soluble salts of Fe
Question Answer: It is due to soluble salts of Na
Temporary hardness of water is due to
- Carbonates of Ca
- Bicarbonates of Na
- Bicarbonates of K
- Bicarbonates of Cs
Question Answer: Carbonates of Ca
Which environmental problem could lead to a rise in sea level?
- Acid rain
- Cutting down the trees in the rain forests
- Global warming
- Damage to the ozone layer
Question Answer: Global warming
Which of following is not a type of pollution for water bodies?
- Heat
- Organic metallic compounds
- Heavy metals
- None
Question Answer: None
EPA stands for?
- Environmental protection agency
- Environmental protection agreement
- Element protection agreement
- All of these
Question Answer: Environmental protection agency
ISO stands for?
- International Organization for Standardization
- International Standard Organization
- International Science organization
- All
Question Answer: International Organization for Standardization
Which pollutants does not leave a residue?
- Air pollutant
- Chemical pollutant
- Noise pollutant
- Soil pollutant
Question Answer: Noise pollutant
In plant noise control, Which method is aidful and used for reducing noise?
- Control of the transmitted noise
- Control at the source
C Plant planning
- All of these
Question Answer: All of these
The maximum noise level at which a man can work for hours is
- 80 d
- 90 dB
- 60 dB
- 70 dB
Question Answer: 90 dB
The unit of sound pressure level is
- Decibel
- Pascal
- Newton
- Ampere
Question Answer: Decibel
The range of sound pressure for uncomfortable level is
- 130-140 dB
- 100-120 dB
- 80-90 dB
- 50-90 dB
Question Answer: 80-90 dB
Which is non-auditory effect of noise on human body?
- Wakening of the colored vision
- Increase in the blood pressure
- Changes in the vascular tone
- All of these
Question Answer: All of these
Which is/are non-point source(s) of water pollution?
- Emission from transport vehicles
- Urban runoff
- Agricultural runoff
- All of these
Question Answer: All of these
Which is/are source(s) of water pollution?
- Fertilizers and pesticides
- Sewage and domestic wastes
- Industrial wastes
- All of these
Question Answer: All of these
Which is/are causes of eutrophication?
- Sewage discharge
- Animal feeding operations
- Fertilizers
- All of these
Question Answer: All of these
Which statements is/are true with regard to the effect of eutrophication?
- load of fungi and bacteria
- Generation efv H2S gas causing foul smell
- Increase in BOD value
- All of these
Question Answer: All of these
Which steps is/are involved in the primary treatment of wastewater?
- Sedementation
- Reduction in the size of trash and solid particles
- Grit scum removal
- All of these
Question Answer: All of these
Which materials is/are POP?
- Diladrin
- DDT
- Aldrin
- All of these
Question Answer: All of these
Which materials is/are POP?
- Heptachlor
- Endrin
- Polychlorinated biphenyls (PCBs)
- All of these
Question Answer: All of these
Which molds secrete aflatoxins which are poisonous and cancer causing chemicals?
- Aspergillus niger
- Aspergillus paarsiticus
- Aspergillus falavus
- Both B and C
Question Answer: Both B and C
Which steps is/are involved in the secondary treatment of wastewater?
- Coagulation/flocculation of colloidal organic matter
- Oxidation of dissolved organic matter
- Degradation of nitrogenous matter
- All of these steps
Question Answer: All of these steps
The dissolved organic matter of the wastewater is removed by biological process involving bacteria. This step is related to which treatment of wastewater:
- Tertiary treatment
- Secondary treatment
- Primary treatment
- All of these steps
Question Answer: Secondary Treatment
Which treatments is the best for degradation of organic/colloidal matter of wastewater?
- Activated sludge
- Rotation biological reactors
- Trickling filters
- None of these
Question Answer: Activated Sludge
Tertiary treatment is generally aidful and used to treat Which?
- Suspended solids
- Dissolved inorganic compounds
- Dissolved organic compounds
- All of these
Question Answer: All of these
Which is/are causes of soil/land pollution?
- Oils spill
- Acid rain
- Deforestation
- All of these
Question Answer: All of these
Which treatments is/are effective in controlling the soil/land pollution?
- Proper solid waste treatment
- Contribution of less waste to soil/land
- Reduction in the use of fertilizers/pesticides
- All of these
Question Answer: All of these
Which statements is/are true regarding green chemistry?
- Reduction in the adverse environmental impacts by proper choice of materials
- Development of processes based on renewable raw materials
- Development of processes that are less prone to release of toxic chemicals
- All of these
Question Answer: All of these
Which statements is/are true regarding green chemistry?
- Use of green solvents
- Design of energy efficient process
- Development of processes based on atom economy
- All of these
Question Answer: All of these
Which statements is/are true regarding green chemistry?
- Development of pharmaceuticals
- Development of enzyme membrane reactors
- Development of biodegradable materials
- All of these
Question Answer: All of these
Which materials is/are carcinogen?
- Benzedrine
- Ethylene dichloride
- Polycyclic aromatic hydrocarbons
- All of these
Question Answer: All of these
The range of sound pressure which is painful is
- 130 140 dB
- 80-90 dB
- 90-80 dB
- 100-120 dB
Question Answer: 80-90 dB
Human hearing is sensitive to frequency in the range of about
- 10,000-20,000 Hz
- 20-20,000 Hz
- 10-10.000 Hz
- 10,000 30,000 Hz
Question Answer: 20-20,000 Hz
A high frequency sound has frequency
- 100 Hz
- 500 Hz
- 300 Hz
- 200 Hz
Question Answer: 500 Hz
Which level is an indicator of hearing loss?
- < 20 dB
- 25 dB
- > 20 dB
- > 25 dB
Question Answer: < 20 dB