Color test of water is done with an instrument called__________________?

Related Mcqs:

High noise levels produced during operation of fans and compressors can be reduced by using__________________?

A. Mufflers (silencers) B. Acoustic absorbent C. Lagging of noisy duct D. None of these...

Beyond what concentration of H2S in air, acute danger to human life exists ?

A. 50 ppm B. 100 ppm C. 300 ppm D. 700 ppm...

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

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

Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?

A. Sedimentation tank B. Circular clarifier C. Mechanical flocculation D. Chemical coagulation...

Fluorosis (a bone disease) is caused by the presence of high concentration of ____________ in atmospheric air?

A. Hydrocarbons B. Hydrogen fluoride C. Hydrogen sulphides D. Nitrogen dioxide...