Disinfection of water results in Complete sterilisation Removal of turbidity Killing of disease bacteria Removal of hardness TRUE ANSWER : ? YOUR ANSWER : ?
The most common cause of acidity in water is Carbon dioxide Hydrogen Nitrogen Oxygen TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following causes a decrease in per capita consumption? Use of metering system Good quality of water Better standard of living of the people Hotter climate TRUE ANSWER : ? YOUR ANSWER : ?
The self cleansing velocity for all sewers in India is usually 1.0 m/sec to 1.2 m/sec Less than 1.0 m/sec 3.0 m/sec to 3.5 m/sec 1.5 m/sec to 2.0 m/sec TRUE ANSWER : ? YOUR ANSWER : ?
The hydraulic mean depth (HMD) for an egg-shaped sewer flowing two-third full is Less than HMD when flowing full Greater than HMD when flowing full None of these Equal to HMD when flowing full TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not a water borne disease? Typhoid Malaria Cholera Dysentery TRUE ANSWER : ? YOUR ANSWER : ?
The most commonly used sewer under culverts is Horseshoe type sewer Circular brick sewer Circular cast iron sewer Semi-elliptical sewer TRUE ANSWER : ? YOUR ANSWER : ?
The maximum discharge of a tube well is about 50 liters/sec 5 liters/sec 500 liters/sec 1000 liters/sec TRUE ANSWER : ? YOUR ANSWER : ?
The main disadvantage of oxidation pond is that Large area is required for construction Maintenance and operation cost are high None of these BOD removal is very low TRUE ANSWER : ? YOUR ANSWER : ?
Cleaning is done by (i) Scraping and removal in filters slow sand (ii) Back washing in slow sand filters (iii) Scraping and removal in filters rapid sand (iv) Back washing in rapid sand filters The correct answer is (i) and (ii) (ii) and (iv) (i) and (iv) (ii) and (iii) TRUE ANSWER : ? YOUR ANSWER : ?