Environmental Engineering in CE Which of the following is not a source of ozone emission in the atmosphere? High voltage electrical equipments Dermatological photo-therapy equipments Refrigerators Xerox machines High voltage electrical equipments Dermatological photo-therapy equipments Refrigerators Xerox machines ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal In sedimentation tanks equipped with mechanical scrapper In clarifiers By chemical coagulation In vacuum filter In sedimentation tanks equipped with mechanical scrapper In clarifiers By chemical coagulation In vacuum filter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Radioactive substances present in the polluted water stream can be removed by Coagulation and filtration None of these Biological oxygen treatment Adsorption in ion exchange materials Coagulation and filtration None of these Biological oxygen treatment Adsorption in ion exchange materials ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream? Sedimentation tank Circular clarifier Mechanical flocculation Chemical coagulation Sedimentation tank Circular clarifier Mechanical flocculation Chemical coagulation 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 Of increased diameter Both A & B Neither A nor B With greater number of blades Of increased diameter Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called Thermosphere Troposphere Stratosphere Mesosphere Thermosphere Troposphere Stratosphere Mesosphere ANSWER DOWNLOAD EXAMIANS APP
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