Environmental Engineering in CE Acute danger to human life (i.e. death) exists, if the concentration of CO₂ in atmospheric air exceeds __________ percent (by volume). 7 3 1 20 7 3 1 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools). 15-20 43961 43832 25-30 15-20 43961 43832 25-30 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the Ionosphere None of these Stratosphere Troposphere Ionosphere None of these Stratosphere Troposphere ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Fine grit present in sewage is removed in the __________ during sewage treatment. Grit chamber Detritus tank Skimming tank Trickling filter Grit chamber Detritus tank Skimming tank Trickling filter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE TLV of lead for public sewer/waste water is about __________ ppm. 150 650 1 25 150 650 1 25 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The upper layer of atmosphere is called the Stratosphere None of these Troposphere Ionosphere Stratosphere None of these Troposphere Ionosphere ANSWER DOWNLOAD EXAMIANS APP
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