Question

Which method of developing a tube well uses Calgon as dispersing agent?
1. Surging method
2. Pumping method
3. Compressed air method
4. Dry ice method

Answer 1

Correct Answer - Option 1 : Surging method

Explanation:

Types of well-developing method:

1. Development by pumping.

2. Development by compressed air.

3. Development by surging: A surge is formed by the reciprocating movement of a plunger in the well. The water moves alternately into the soil and comes out in the well during downward and backward stroke respectively. Sometimes to increase the efficiency of development a dispersing agent like Calgon (sodium hexa-meta-phosphate) is added to well water.

4. Development by back-washing.

5. Development by high-velocity jet.

6. Development by using chemicals.