Environmental Engineering in CE The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. 90 60 120 105 90 60 120 105 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel. 1 5 10 20 1 5 10 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE __________ is the process of killing organism in water. Coagulation Sedimentation Sterilisation Disinfection Coagulation Sedimentation Sterilisation Disinfection ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Carcinogenic air pollutants cause Bone decay Cancer Anemia Asphyxiation (suffocation) Bone decay Cancer Anemia Asphyxiation (suffocation) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is a green house gas other than CO₂ ? Nitrous oxide All of these Methane Chlorofluro carbons (CFC) Nitrous oxide All of these Methane Chlorofluro carbons (CFC) 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? Mechanical flocculation Circular clarifier Chemical coagulation Sedimentation tank Mechanical flocculation Circular clarifier Chemical coagulation Sedimentation tank ANSWER DOWNLOAD EXAMIANS APP
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