Environmental Engineering Questions

• 5-200 μm size particles are called
• Which of the following is the most widely used disinfectant in water treatment?
• The most commonly used chemical coagulant in water treatment is
• Pick out the correct statement.
• Workers working in __________ industry are most prone to white lung cancer.
• The resistance of water to the passage of light through it is a measure of the
• __________ plant emits large amount of SO2 as an air pollutant.
• Higher concentration of nitrogen dioxide in atmospheric air causes
• On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because
• Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the
• World environment day is observed every year on the 5th of
• Pick out the correct statement.
• Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for
• Presence of a certain minimum quantity of flourine is desirable in potable water to prevent
• Pollution by particulate matter emission in the atmosphere does not take place during metal
• BOD of raw municipal sewage may be in the range of about __________ mg/litre.
• Which of the following is a green house gas other than CO2?
• Septic tanks are used for the __________ of the deposited solids.
• A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
• Inhalation of silica dust causes a disease called