Waste Water Engineering
For detecting the nitrites in the sewage, the matching colour may be developed by adding

Potassium permanganate
Phenol-di -sulphuric acid potassium hydroxide
None of these
Sulphuric acid and napthamine

ANSWER DOWNLOAD EXAMIANS APP

Waste Water Engineering
Which one of the following statements regarding septic tanks is wrong?

A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided
The depth of tank is kept equal to its width
The outlet invert level is kept 5 to 7.5 cm below the inlet invert level
The minimum width of septic level is 90 cm

ANSWER DOWNLOAD EXAMIANS APP