Dissolved oxygen in streams is Maximum at midnight Minimum at noon Maximum at noon Same throughout the day TRUE ANSWER : ? YOUR ANSWER : ?
The suitable method of forecasting population for a young and rapidly increasing city is Incremental increase method Geometrical increase method Graphical method Arithmetical increase method TRUE ANSWER : ? YOUR ANSWER : ?
Sewerage system is usually designed for 28 years 25 years 26 years 27 years TRUE ANSWER : ? YOUR ANSWER : ?
The pathogens can be killed by Nitrification Chlorination None of these Oxidation TRUE ANSWER : ? YOUR ANSWER : ?
Sewage treatment units are designed for Maximum flow only Minimum flow only Average flow only Maximum and minimum flow TRUE ANSWER : ? YOUR ANSWER : ?
The devices which are installed for drawing water from the sources are called Aquiclude Filters Intakes Aquifers TRUE ANSWER : ? YOUR ANSWER : ?
The phenolic compounds in public water supply should not be more than 0.1 ppm 0.0001 ppm 0.01 ppm 0.001 ppm TRUE ANSWER : ? YOUR ANSWER : ?
In facultative stabilization pond, the sewage is treated by Algae only Dual action of aerobic bacteria and anaerobic bacteria Sedimentation Aerobic bacteria only TRUE ANSWER : ? YOUR ANSWER : ?
If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be 4 mm/hr 20 mm/hr 40 mm/hr 10 mm/hr TRUE ANSWER : ? YOUR ANSWER : ?
Select the correct relationship between porosity (N), specific yield (y) and specific retention (R) R > (N + y) y = N + R R = N + y N = y + R TRUE ANSWER : ? YOUR ANSWER : ?