Construction Planning and Management
Consider the following operations:1. Drilling2. Blasting3. Mucking4. Placing steel5. Placing concreteThe correct sequence of these operations in tunnel construction is

1, 2, 4, 3, 5
1, 3, 2, 4, 5
1, 2, 3, 4, 5
1, 3, 4, 2, 5

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Construction Planning and Management
Whenever an activity has zero total float, then

Free float and independent float both need not be zero
Free float and independent float both must be zero
Free float of the activity must be zero but independent float need not be zero
Independent float must be zero but free float need not be zero

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