Main pollutants released from petroleum refineries is SO₃, NO₂ & CO₂ CO₂, NO & SO₃ CO, SO₂ & H₂S CO₂, H₂S & NO₂ TRUE ANSWER : ? YOUR ANSWER : ?
Ozone is A primary pollutant Impervious to ultra-violet rays Both B & C A secondary pollutant TRUE ANSWER : ? YOUR ANSWER : ?
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is Cavitation Pipe vibrations Boundary layer separation Fluctuation in liquid flow TRUE ANSWER : ? YOUR ANSWER : ?
Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm. 20 200 400 100 TRUE ANSWER : ? YOUR ANSWER : ?
Hydrogen ion concentration in distilled water is 7 x 10⁷ 10⁷ 7 x 10⁻⁷ 10⁻⁷ TRUE ANSWER : ? YOUR ANSWER : ?
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant? Lead Aluminium Mercury Arsenic TRUE ANSWER : ? YOUR ANSWER : ?
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones. 10² 10⁵ 10⁹ 10¹⁵ TRUE ANSWER : ? YOUR ANSWER : ?
Most of the atmospheric air pollutants are present in large quantity in Stratosphere Trophosphere Mesosphere Thermosphere TRUE ANSWER : ? YOUR ANSWER : ?
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in Iron & steel plant Food industry Municipal sewage treatment Petroleum refinery TRUE ANSWER : ? YOUR ANSWER : ?
Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air's water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes All of these Respiratory trouble Irritation in eyes Poor visibility due to sky darkening TRUE ANSWER : ? YOUR ANSWER : ?