Q. Corrosion in boilers can be prevented by
✅ Correct Answer: (D)
All (A), (B) and (C)
Environmental Engineering MCQs | Page - 5
Dear candidates you will find MCQ questions of Environmental Engineering here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. Deaeration of high pressure boiler feed water is done to reduce
✅ Correct Answer: (B)
Its dissolved oxygen content
Q. Death may occur, when SO2 concentration in atmospheric air exceeds _________ ppm.
✅ Correct Answer: (C)
400
Q. Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as
✅ Correct Answer: (B)
Peroxyacetyl nitrate (PAN) or methyl nitrite
Q. Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
✅ Correct Answer: (D)
All (A), (B) & (C)
Q. Disinfection of water is done to remove
✅ Correct Answer: (D)
Bacteria
Q. Dissolved oxygen content in river water is around _________ ppm.
✅ Correct Answer: (A)
5
Q. During sewage treatment, the sewage is subjected to _________ treatment in Imhoff tank.
✅ Correct Answer: (D)
Both (B) and (C)
Q. During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?
✅ Correct Answer: (A)
Idle running
Q. Dust collection efficiency of a cyclone separator depends upon its
✅ Correct Answer: (D)
All (A), (B) & (C)
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