Environmental Engineering

Question: In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) [A]. t = 15 – 0.0065h [B]. t = 15 + 0.0065h [C]. t = 0.0035h -15 [D]. t = 15 –…

Question: In the context of the chemical process industries, the term BOD is normally associated with the [A]. characterisation of solid wastes. [B]. organic concentration in gaseous effluents. [C]. characterisation of liquid effluents. [D]. characterisation of boiler feed water. Answer: Option C Explanation: No answer description available for this question.

Question: A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called [A]. cesspool [B]. lagoon [C]. skimming mill [D]. septic tank Answer: Option D Explanation: No answer description available for this question.

Question: Carcinogenic air pollutants cause [A]. bone decay [B]. cancer [C]. asphyxiation (suffocation) [D]. anemia Answer: Option B Explanation: No answer description available for this question.

Question: Dissolved oxygen content in river water is around __________ ppm. [A]. 5 [B]. 100 [C]. 250 [D]. 500 Answer: Option A Explanation: No answer description available for this question.

Question: Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools). [A]. 1-2 [B]. 5-10 [C]. 15-20 [D]. 25-30 Answer: Option B Explanation: No answer description available for this question.

Question: Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of [A]. CO2 [B]. SO2 [C]. hydrocarbons [D]. CFC (chloro fluoro carbon) Answer: Option D Explanation: No answer description available for this question.

Question: Ozone level is generally found to be depleted in India in the month of [A]. February [B]. July [C]. April [D]. December Answer: Option D Explanation: No answer description available for this question.

Question: Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ? [A]. CO2 [B]. H2 [C]. SO3 [D]. N2 Answer: Option C Explanation: No answer description available for this question.

Question: Exposure to small amount of __________ results in high blood pressure & heart disease in human beings. [A]. hydrogen sulphide [B]. mercury [C]. cadmium [D]. asbestos Answer: Option C Explanation: No answer description available for this question.