Persons working in cement plants and limestone quarries are more prone to disease like__________________?

Related Mcqs:

Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?

A. Low amount of excess combustion air B. Large quantity of excess combustion air C. Hydrocarbon fuel D. Pulverised coal as fuel...

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

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

The lowest layer of atmosphere is known as the_____________________?

A. Stratosphere B. Troposphere C. Ionosphere D. None of these...

A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?

A. Global warming B. Green house C. Atmospheric effect D. Ionosphere...

____________ substances present in sewage are removed in grit chamber during sewage treatment?

A. Organic B. Fatty C. Inorganic D. Dissolved...