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 Biological oxygen pond Trickling filters Gravity separator having oil skimming devices Aerated lagoons Biological oxygen pond Trickling filters Gravity separator having oil skimming devices Aerated lagoons ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m²/hr. 3 to 6 0.1 to 1 10 to 15 15 to 20 3 to 6 0.1 to 1 10 to 15 15 to 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is Both B and C Proportional to the viscosity & density of the gas Proportional to the pressure of the gas Inversely proportional to viscosity of gas Both B and C Proportional to the viscosity & density of the gas Proportional to the pressure of the gas Inversely proportional to viscosity of gas ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million). 0.2 0.002 1.2 4.8 0.2 0.002 1.2 4.8 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of bacteria in potable (drinking) water causes Disease Bad taste & colour Turbidity Bad odour Disease Bad taste & colour Turbidity Bad odour ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Ozone level is generally found to be depleted in India in the month of December July February April December July February April ANSWER DOWNLOAD EXAMIANS APP
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