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 1.2 0.002 4.8 0.2 1.2 0.002 4.8 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Ethanolamine is an absorbant used for the removal of __________ from air/gas. HF Both B & C SO₂ H₂S HF Both B & C SO₂ H₂S ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Higher concentration of CO₂ in atmosphere Prevents solar heat being radiated out completely, resulting in All of these Allows visible solar radiation (ultraviolet) of short wave-length to pass through Reflects and absorbs the longer wavelength (infra-red) radiations Prevents solar heat being radiated out completely, resulting in All of these Allows visible solar radiation (ultraviolet) of short wave-length to pass through Reflects and absorbs the longer wavelength (infra-red) radiations ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes Explosion hazards Depletion of dissolved oxygen Persistent foam Fire hazards Explosion hazards Depletion of dissolved oxygen Persistent foam Fire hazards ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is an adsorbant for removal of nitrogen oxides from gas/air? Silica gel Bog iron (iron oxide) Active carbon Pulverised limestone Silica gel Bog iron (iron oxide) Active carbon Pulverised limestone ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In water treatment, alum[Al2(SO₄)3] is used for the process of Coagulation Sedimentation Disinfection Filtration Coagulation Sedimentation Disinfection Filtration ANSWER DOWNLOAD EXAMIANS APP
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