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For the construction of water bound macadam roads, the correct sequence of operation after spreading coarse aggregates is
1. Dry rolling, wet rolling, application of screening and application of filler
2. Dry rolling, application of filler wet rolling, and application of screening
3. Dry rolling, application of screening, wet rolling, and application of filler
4. Dry rolling, application of screening, application of filler and wet rolling

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Correct Answer - Option 3 : Dry rolling, application of screening, wet rolling, and application of filler

Explanation

Water bound macadam roads: 

In this method, the broken stones of the base course and surface course, if any, are bound by the stone dust in presence of moisture. 

The roads whose wearing course consist of clean crushed aggregates, mechanically interlocked by rolling and bound together with filler material and water and laid on a well compacted base course, is called water bound macadam road.

The Process of WBM is

1. Dry Rolling

2. Application of screenings

3. Sprinkling and grouting

4. Wet rolling

5. Application of binding material

6. Checking for surface unevenness and Rectification

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