Construction Planning and Management
In the given figure, the network of a project represents

Activity of excavation which takes 8 units of time
None of these
Activity of an excavation which starts at event No. 1 and ends at even No. 2
Activity of an excavation of a footing

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Construction Planning and Management
Free float is mainly used to

Establish priorities
Identify the activities, which can be delayed without affecting the total float of succeeding activity
Identify the activities which can be delayed without affecting the total float of preceding activity
Identify the activities which can be delayed without affecting the total float of either the preceding or succeeding activities

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