Chemical Environmental Engineering

Arsenic pollutant is not generated in _______________ industries? A. Tanneries B. Glass & ceramicC. Beverages D. Any of these

Pollution by particulate matter emission in the atmosphere does not take place during metal____________________? A. Grinding B. Machining C. CuttingD. Polishing

Main pollutant present in automobile exhaust is_________________? A. CO B. CO2 C. NO D. Hydrocarbons

Scale formation in boiler is controlled by____________________? A. Preheating of feed waterB. Reduction in hardness, silica & alumina in feed water C. Keeg the pH value of feed water just below 7 D. Eliminating H2S in feed water

Noise level heard at a distance of about 100 metres from a jet engine with after burner is about _____________ decibels? A. 120 B. 140C. 170 D. 200

Presence of bacteria in potable (drinking) water causes_________________? A. TurbidityB. Disease C. Bad odour D. Bad taste & colour

TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm? A. 0.1 B. 25 C. 100 D. 1000

Radioactive substances present in the polluted water stream can be removed by_________________? A. Biological oxygen treatment B. Coagulation and filtrationC. Adsorption in ion exchange materials D. None of these

H2S present in gaseous stream can be removed by adsorption on _____________________? A. Silica gel B. Active carbonC. Bog iron D. Limestone powder

Maximum permissible turbidity in potable water is _____________ ppm? A. 1B. 10 C. 250 D. 1000