Hamad Chemical Environmental Engineering 18/03/2023 A. 2 to 4 B. 8 to 12 C. 16 to 20 D. 24 to 32 Related Mcqs: Global warming may result in __________________?A. Flood B. Cyclone C. Decrease in food productivity D. All A., B. and C.... Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?A. 0.002 B. 0.2 C. 1.2 D. 4.8... Main pollutants released from iron & steel industry is__________________?A. CO, CO2 & SO2 B. H2S, NO & SO3 C. CO2, H2S & NO2 D. SO3, NO2 & CO2... High noise level in a chemical plant can be controlled by the_________________?A. Suppression of noise at the source itself B. Path control of noise C. Protection of operating personnel D. All A., B. & C.... Aerosols present in atmospheric air may be__________________?A. Positively charged B. Negatively charged C. Neutral D. Combination of all A., B. & C....
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