Construction Planning and Management
In time-cost optimization of a project, crashing is done.

On all the activities lying on the critical path
On original critical activities and those that become critical at any stage of crashing in the order of ascending cost slope
Only on activities lying on the original critical path and having flatter cost slopes
On all the activities

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Construction Planning and Management
Mobilization advance up to 10% of the cost of work is given to a contractor

On commencement of work at site for payment of loan taken by him
For all activities required to start the work at site on finalization of the contract document
For the payment of advances to labour and other staff
For the purchase of construction materials

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

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Construction Planning and Management
At a work site, statistical quality control of concrete means

Reduction in wastage of inspection costs
Measurement of risks to eliminate failures
Reduction in costs for the removal of defects
Applying the theory' of probability to sample testing or inspection

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