Environmental Engineering in CE Which of the following is not a secondary air pollutant? Sulphur dioxide All of these Photochemical smog Ozone Sulphur dioxide All of these Photochemical smog Ozone ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by Aerated lagoons Biological oxygen pond Gravity separator having oil skimming devices Trickling filters Aerated lagoons Biological oxygen pond Gravity separator having oil skimming devices Trickling filters ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE 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 With greater number of blades Both A & B Neither A nor B Of increased diameter With greater number of blades Both A & B Neither A nor B Of increased diameter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels. 105 135 160 185 105 135 160 185 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which is the most widely used coagulant for the treatment of turbid water? Lime Alum (aluminium sulphate) Sodium aluminate Ferric chloride Lime Alum (aluminium sulphate) Sodium aluminate Ferric chloride ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes Reduced strength of textiles All of these Fading of dyes on textiles Corrosion, tarnishing & soiling of metals Reduced strength of textiles All of these Fading of dyes on textiles Corrosion, tarnishing & soiling of metals ANSWER DOWNLOAD EXAMIANS APP
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