Environmental Engineering Questions

• 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)?
• Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
• Presence of excess flourine in water causes
• The widest explosive limit is of __________ , thereby making it the most explosive gas.
• Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes
• During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?
• Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by
• Which of the following pollutants is not emitted during volcanic eruptions?
• Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.
• Exposure to chemicals having carcinogenic properties cause
• A shallow pond in which the sewage is retained and biologically treated is called
• Which of the following is the most severe air pollutant?
• Which is the most practical and economical method for removal of suspended solid matter from polluted water?
• Which of the following pollutants, if present in atmosphere is detectable by its odour?
• The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
• Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?
• Maximum permissible turbidity in potable water is __________ ppm.
• Which of the following is not a secondary air pollutant?
• Pick out the wrong statement.
• __________ can not control the noise pollution.