The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.
Maximum permissible turbidity in potable water is __________ ppm.
Maximum permissible turbidity in potable water is __________ ppm.
The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called
A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
Dust collection efficiency of a cyclone separator depends upon its
Dust collection efficiency of a cyclone separator depends upon its
The common pollutant generated in chlor-alkali industry and battery manufacture is
The common pollutant generated in chlor-alkali industry and battery manufacture is
The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).
The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).
Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the
Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for
Brown spots in fabrics will be caused by washing with water containing large amount of .
Brown spots in fabrics will be caused by washing with water containing large amount of .
The resistance of water to the passage of light through it is a measure of the
The resistance of water to the passage of light through it is a measure of the
TLV of mercury in potable (drinking) water is about __________ ppm.
TLV of mercury in potable (drinking) water is about __________ ppm.
Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)?
Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)?
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?
Which of the following is not a weightless pollutant?
Which of the following is not a weightless pollutant?
For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?
Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to
Arsenic pollutant is not generated in____industries.
Arsenic pollutant is not generated in____industries.
Ionisation potential employed in the industrial electrostatic precipitator is of the order of
Ionisation potential employed in the industrial electrostatic precipitator is of the order of
In water chemical treatment plant, use of chloramines ensures
In water chemical treatment plant, use of chloramines ensures
Smoke is produced due to
Smoke is produced due to
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?
Fresh domestic sewage is __________ in color.
Fresh domestic sewage is __________ in color.
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by
Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?
Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?
Removal of __________ results from the disinfection of water.
Removal of __________ results from the disinfection of water.
Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?
Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?
Presence of nitrates in water in excess of 50 ppm causes
Presence of nitrates in water in excess of 50 ppm causes
Algae growth in water is controlled by
Algae growth in water is controlled by
Which of the following is the most major constituents of air pollutants?
Which of the following is the most major constituents of air pollutants?
Maximum permissible residual chlorine in treated water should be __________ mg/litre.
Maximum permissible residual chlorine in treated water should be __________ mg/litre.
Pick out the wrong statement.
Pick out the wrong statement.
Lagoons used for purification of polluted water
Lagoons used for purification of polluted water
Pick out the wrong statement.
Pick out the wrong statement.
Industrial workers working in leather tanning & manufacturing units are prone to suffer from
Industrial workers working in leather tanning & manufacturing units are prone to suffer from
The biological decomposition of organic substances in wastes controlled conditions is called
The biological decomposition of organic substances in wastes controlled conditions is called
Presence of bacteria in potable (drinking) water causes
Presence of bacteria in potable (drinking) water causes
The main industrial source of emission of hydrogen sulphide air pollutant is
The main industrial source of emission of hydrogen sulphide air pollutant is
Pick out the wrong statement
Pick out the wrong statement
Thermal pollution due to excessive heat & temperature in the working place causes
Thermal pollution due to excessive heat & temperature in the working place causes
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
The pH value of oxidised sewage is about
The pH value of oxidised sewage is about
Pick out the wrong statement.
Pick out the wrong statement.
Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?
Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?
The pH value of potable water should be between
The pH value of potable water should be between
Deaeration of high pressure boiler feed water is done to reduce
Deaeration of high pressure boiler feed water is done to reduce
Which of the following fine dust removal equipments is the most efficient?
Which of the following fine dust removal equipments is the most efficient?
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
Pick out the wrong statement.
Pick out the wrong statement.
__________ can not control the noise pollution.
__________ can not control the noise pollution.
A man exposed to excessive noise level in the working environment may suffer from
A man exposed to excessive noise level in the working environment may suffer from
Which of the following acts as a natural source of air pollution?
Which of the following acts as a natural source of air pollution?
Soluble silica present in boiler feed water can be removed by
Soluble silica present in boiler feed water can be removed by
Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?
Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
In the context of the chemical process industries, the term BOD is normally associated with the
In the context of the chemical process industries, the term BOD is normally associated with the
__________ is removed from water by lime-soda process.
__________ is removed from water by lime-soda process.
Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.
Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?
The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the
The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the
When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.
When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.
What are the methods of treatment & disposal of radioactive wastes?
What are the methods of treatment & disposal of radioactive wastes?
Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by
Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
Presence of __________ bacteria in water causes disease like typhoid.
Presence of __________ bacteria in water causes disease like typhoid.
Which of the following is not a natural source of air pollution?
Which of the following is not a natural source of air pollution?
Hydrogen ion concentration in distilled water is
Hydrogen ion concentration in distilled water is
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the
The most commonly used chemical coagulant in water treatment is
The most commonly used chemical coagulant in water treatment is
Salt content in sea water is about __________ percent.
Salt content in sea water is about __________ percent.
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air?
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air?
Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes
Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?
Aerosols present in atmospheric air may be
Aerosols present in atmospheric air may be
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is
__________ plant emits large amount of SO₂ as an air pollutant.
__________ plant emits large amount of SO₂ as an air pollutant.
Lagooning process is mainly a means of the
Lagooning process is mainly a means of the
Carbonaceous particles having size less than 1 μm are called
Carbonaceous particles having size less than 1 μm are called
Aerobic biological oxidation ponds used for the purification of polluted water
Aerobic biological oxidation ponds used for the purification of polluted water
Which of the following is not a secondary air pollutant?
Which of the following is not a secondary air pollutant?
Growth of __________ is promoted by the presence of manganese in water.
Growth of __________ is promoted by the presence of manganese in water.
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?
Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes
Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes
Which of the following processes is involved in the biochemical treatment of sewage effluents?
Which of the following processes is involved in the biochemical treatment of sewage effluents?
Water effluent generated in printing industry is decolourised by
Water effluent generated in printing industry is decolourised by
Reinglemann chart is used for the measurement of the
Reinglemann chart is used for the measurement of the
'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
The progressive warming up of the earth's surface is mainly due to the
The progressive warming up of the earth's surface is mainly due to the
The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the
The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the
Which of the following is the most detrimental for water used in high pressure boiler?
Which of the following is the most detrimental for water used in high pressure boiler?
Workers working in __________ industry are most prone to white lung cancer.
Workers working in __________ industry are most prone to white lung cancer.
High noise level in a chemical plant can be controlled by the
High noise level in a chemical plant can be controlled by the
Polyvinyl chloride containers are not suitable for storing
Polyvinyl chloride containers are not suitable for storing
