Construction Planning and Management
Free float for any activity is defined as the difference between

its latest start time and earliest start time
its earliest finish time and earliest start time for its successor activity
its earliest finish time and latest start time for its successor activity
its latest finish time and earliest start time for its successor activity

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Construction Planning and Management
Consider the following statements for a power shovel: (i) Output can be increased by reducing the angle of swing for a given depth of cut. (ii) For a given angle of swing, output will be maximum at optimum depth of cut. (iii) Output can be increased by keeping the depth of cut less than optimum depth. (iv) Output can be increased by increasing the size of shovel.

(i), (iii) and (iv) are correct
(i) and (iv) are correct
(i), (ii) and (iv) are correct
(ii), (iii) and (iv) are correct

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Construction Planning and Management
If the optimistic time, most likely time and pessimistic time for activity A are 4, 6 and 8 respectively and for activity B are 5, 5.5 and 9 respectively, then

expected time of activity A is greater than the expected time of activity B
None of these
expected time of activity B is greater than the expected time of activity A
expected time of both activities A and B are same

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