BOD of raw municipal sewage may be in the range of about _____________ mg/litre?

Related Mcqs:

Noise pollution level in a chemical plant is expressed in __________________?

A. Roentgen B. Decibel C. Hertz D. None of these...

Most efficient and suitable dust removal equipment for removal of fly-ash from flue gas in a thermal power plant is the__________________?

A. Gravity settling chamber B. Cyclone separator C. Electrostatic precipitator D. Bag filter...

TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?

A. 0.1 B. 25 C. 100 D. 1000...

Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes_________________?

A. Paralysis of muscles & loss of appetite B. Nervous depression C. Gastritis and diarrhea D. All A., B. and C....

Limestone powder is injected during pulverised coal burning in boilers to ______________ the flue gases?

A. Reduce SO2 content in B. Catalytically convert SO2 to SO3 in C. Increase the dew point of D. None of these...