Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?

Related Mcqs:

Global warming may result in __________________?

A. Flood B. Cyclone C. Decrease in food productivity D. All A., B. and C....

The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of _____________ of water?

A. Dissolved oxygen content B. Biological oxygen demand C. Vapor pressure D. All A., B. and C....

Foul odour and bad taste of water is removed by treating with__________________?

A. Alum B. Bleaching powder C. Activated carbon D. Copper sulphate...

Brown spots in fabrics will be caused by washing with water containing large amount of___________________?

A. Iron B. Zinc C. Iodine D. Bromine...

Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?

A. 3 B. 30 C. 7 D. 70...