As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?

Related Mcqs:

The upper layer of atmosphere is called the ____________________?

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

Threshold limit value (TLV) of CO in air is _____________ ppm?

A. 5 B. 50 C. 2000 D. 5000...

Pick out the wrong statement?

A. Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust B. NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light C. Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees D. H2S is not at all produced during combustion … Pick out the wrong statement?Read More...

Presence of bacteria in potable (drinking) water causes_________________?

A. Turbidity B. Disease C. Bad odour D. Bad taste & colour...

The earth’s atmosphere is an envelope of gases present upto a height of about ______________ kms?

A. 10 B. 200 C. 1000 D. 2000...