Question 1 : Iron and Manganese are generally present in water supplies as
1. Suspension
2. Solution
3. Colloidal particles
4. Either suspension or solution
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Question 2 : When activated carbon is applied at more than one point, then it is called ________
1. Dual treatment
2. Split treatment
3. Sludge treatment
4. Carbonaceous treatment
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Question 3 : The dose of activated carbon in powdered form is controlled by
1. Chromatography
2. Distillation
3. Threshold odor test
4. MPN test
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Question 4 : The brown tinge in the water is due to the presence
1. Zinc
2. Copper
3. Iron
4. Manganese
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Question 5 : Which of the following is not a type of distillation plant?
1. Vertical tube evaporator
2. Multistage flash evaporator
3. Tube settler
4. Multi-effect multistage flash evaporator
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Question 6 : The process in which the brackish water is forced across a permeable membrane by mechanical forces is called as
1. Filtration
2. Semi filtration
3. Coagulation
4. Hyper filtration
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Question 7 : The reddish tinge in the water is due to the presence
1. Zinc
2. Copper
3. Iron
4. Manganese
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Question 8 : Fluorex is a special mixture of
1. Di-calcium phosphate and carbon
2. Tri-calcium phosphate and hydroxyapatite
3. Di-calcium phosphate and phosphoric acid
4. Tri-calcium phosphate and carbon
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Question 9 : In which process, the fluoride content of water is raised?
1. Chlorination
2. Fluoridation
3. Defluoridation
4. Flocculation
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Question 10 : Which of the following desalination method is more suitable for brackish water than sea water?
1. Distillation
2. Solar evaporation
3. Reverse osmosis
4. Freezing
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