Environmental Engineering in CE MCQs
Practice free Environmental Engineering in CE multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 307 questions — no login required.
Question 46hard
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.
Question 47hard
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in
Question 48hard
In a sedimentation tank, the detention period for water ranges from __________ hours.
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Question 49hard
In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks.
Question 50medium
Which of the following is an adsorbant used for the removal of SO2 from gas/air?
Question 51medium
The function of skimming tank in sewage treatment is to remove __________ substances.
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Question 52hard
Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air's water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes
Question 53hard
Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO2 in air is __________ ppm.
Question 54medium
In sewage treatment, its sedimentation is speeded up by commonly adding