Construction Planning and Management
Wheeled tractors are replacing crawler tractors because 1. Wheeled tractors travel faster. 2. Crawler tractors are more expensive. 3. Track parts of a crawler wear out quickly. 4. Crawler tractors have stick control. of following statements

2, 3 and 4 are correct
1, 2 and 3 are correct
1, 2 and 4 are correct
1, 3 and 4 are correct

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Construction Planning and Management
Free float is mainly used to

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

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