Chemical Environmental Engineering Quiz 5

TLV of mercury in potable (drinking) water is about _______ ppm?

Which of the following pollutants is absent in the emissions from a fertiliser plant ?

World environment day is observed every year on the 5th of_____?

Water filtration rate in a slow sand filter ranges from _____ litres/m2/hr?

TLV of aldrin in public water supply system is about _____ ?g/litre?

Which of the following is the most major constituents of air pollutants ?

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?

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 ?

Which of the following is an adsorbent for removal of nitrogen oxides from gas/air ?

Which of the following plants does not emit appreciable amount of SO2 in atmosphere ?

Which of the following is not a natural source of air pollution ?

Which of the following is a green house gas other than CO2 ?

The pH value of potable water should be between______?

Which of the following radioactive wastes emits all ?, ? & ? rays and hence is the most hazardous of all radioactive emitters ?

The resistance of water to the passage of light through it is a measure of the_____?

Threshold limit value (TLV) of CO in air is ______ ppm?

Which of the following acts as a natural source of air pollution ?

Which of the following is not a secondary air pollutant ?

Which of the following is the most widely used disinfectant in water treatment ?

Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly ______ substances?

Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ?

Which of the following pollutants, if present in atmosphere is detectable by its odour ?

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) ?

Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about _______ ppm (parts per million)?

Which of the following is not a practical method of low level radioactive waste disposal ?

Which is the most efficient dust removal equipment for removal of submicronic dust particles from blast furnace gas ?

Which of the following is not a source of ozone emission in the atmosphere?

Which of the following fine dust removal equipments is the most efficient ?

Which is the most widely used coagulant for the treatment of turbid water ?

The upper layer of atmosphere is called the ______?

Turbidity of water is an indication of the presence of___________?

TLV of lead for public sewer/waste water is about _______ ppm?

The term Biological Oxygen Demand (BOD) is used in relation to ________?

Tolerable limit of nitrogen oxides in air is ______ ppm?

TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes__________?

Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ?gas chamber? is about _______ ppm?

Which of the following is not a weightless pollutant ?

Which of the following is a manmade source of air pollution ?

The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the ___________?

Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?

Thermal pollution due to excessive heat & temperature in the working place causes___________?

Which of the following is a secondary air pollutant ?

Which of the following is the most detrimental for water used in high pressure boiler ?

Which of the following sources is responsible for maximum air pollution ?

Which of the following is the most lethal water pollutant ?

There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant ?

There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth?s surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about ______ ?C/km?

World?s worst radioactive pollution was caused by nuclear reactor disaster which occured in _____?

TLV of ozone (O3) and phosgene (COCl2) in air is ________ ppm?

Workers working in ________ industry are most prone to white lung cancer?

The progressive warming up of the earth?s surface is mainly due to the_____?

The weakest sound that can be heard by a person in a quiet environment is equivalent to _____ decibel ?

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 is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur ?

TLV of ammonia, nitrogen dioxide and phenol vapor in air is _______ ppm ?

The type of bacteria which is active in trickling filter during biological treatment of sewage is the ______ bacteria?

Water filtration rate in a rapid sand filter ranges from _______ kilolitres/m2/hr?

Which of the following industries discharge mercury as a pollutant ?

Which of the following air pollutants is not toxic to vegetation i.e., doesn?t cause vegetation damage ?

Which of the following processes is involved in the biochemical treatment of sewage effluents ?

Tri-sodium phosphate is used in boiler water treatment to reduce______?

Which of the following is an adsorbent used for the removal of SO2 from gas/air ?

Which of the following is the most severe air pollutant ?

Which of the following dust collection equipments is the least efficient (for sub-micronic particles) ?

The pH value of oxidised sewage is about_______?

What are the methods of treatment & disposal of radioactive wastes ?