Hamad Chemical Environmental Engineering 15/01/2022 A. Grit B. Aggregates C. Aerosols D. Smoke 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... Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan_________________?A. With greater number of blades B. Of increased diameter C. Both A. & B. D. Neither A. nor B.... 80% less than 200 mesh size particles are called____________________?A. Smoke B. Powder C. Grit D. Aggregates... Polyvinyl chloride containers are not suitable for storing_________________?A. Foodstuffs B. Woolen clothes C. Metallic powder D. None of these...
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