The upper layer of atmosphere is called the ____________________?

Related Mcqs:

Ringelmann chart No. 2 corresponds to _______________ percent black smoke?

A. 10 B. 20 C. 40 D. 80...

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)?

A. 10 B. 90 C. 800 D. 750...

Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan_________________?

A. With greater number of blades B. Of increased diameter C. Both A. & B. D. Neither A. nor B....

World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in ___________________?

A. Arizona (U.S.A.) B. Chernobyl (undivided U.S.S.R.) C. Pennsylvania (U.S.A.) D. Moscow (U.S.S.R.)...

Fresh domestic sewage is _______________ in color?

A. Grey B. Dark brown C. Red D. Black...