Environmental Engineering Which of the following chemical compounds can be used for de-chlorination of water? Carbon dioxide Sulphur dioxide Bleaching powder Chloramines Carbon dioxide Sulphur dioxide Bleaching powder Chloramines ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following sewers is preferred for combined system of sewage? None of these Circular sewer Egg shaped sewer Rectangular sewer None of these Circular sewer Egg shaped sewer Rectangular sewer ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is Air relief valve Reflux valve Sluice valve Pressure relief valve Air relief valve Reflux valve Sluice valve Pressure relief valve ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 1000 mg/liter 100 mg/liter 1 mg/liter 10 mg/liter 1000 mg/liter 100 mg/liter 1 mg/liter 10 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The amount of coagulant needed for coagulation of water increases with (i) Increase in turbidity of water (ii) Decrease in turbidity of water (iii) Increase in temperature of water (iv) Decrease in temperature of water The correct answer is (ii) and (iii) (i) and (ii) (i)and(iv) (ii) and (iv) (ii) and (iii) (i) and (ii) (i)and(iv) (ii) and (iv) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Sludge volume index is defined as the ratio of Percentage of sludge by volume to percentage of suspended solids by weight Percentage of total solids by weight to percentage of sludge by volume Percentage of suspended solids by weight to percentage of sludge by volume Percentage of sludge by volume to percentage of total solids by weight Percentage of sludge by volume to percentage of suspended solids by weight Percentage of total solids by weight to percentage of sludge by volume Percentage of suspended solids by weight to percentage of sludge by volume Percentage of sludge by volume to percentage of total solids by weight ANSWER DOWNLOAD EXAMIANS APP
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