Environmental Engineering in Chemical Engineering MCQs

176. Polyvinyl chloride containers are not suitable for storing

177. Which of the following is a green house gas other than CO₂?

A. Methane

B. Nitrous oxide

C. Chlorofluro carbons (CFC)

D. All of the above

Discussion

178. Iron & manganese present as pollutant in water can not be removed by

A. Ion exchange process

B. Oxidation followed by settling & filtration

C. Lime soda process or manganese zeolite process

D. Chlorination

Discussion

179. As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m³.(μg-microgram)

180. Which of the following dust collection equipments is the least efficient (for sub-micronic particles)?

A. Dust catcher (gravity type)

B. Cyclone separator

C. Bag filter

D. Hollow wet scrubber

Discussion

181. Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas?

A. Packed scrubber

B. Gravity settling chamber

C. Electrostatic precipitator

D. Hydrocyclone

Discussion

182. Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by

A. Biological oxygen pond

B. Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)

C. Lagoons

D. Filtration

Discussion