In time-cost optimization of a project, crashing is done____________?

A. on all the activities
B. on all the activities lying on the critical path
C. only on activities lying on the orginal critical path and having flatter cost slopes
D. on original critical activities and those that become critical at any stage of crashing in the order of ascending cost slope
✅ The correct answer is option D.

Sinking fund is_______________?

A. the fund for rebuilding a structure when its economic life is over
B. raised to meet maintenance costs
C. the total sum to be paid to the municipal authorities by the tenants
D. a part of the money kept in reserve for providing additional structures and structural modifications
✅ The correct answer is option A.

The reduction in project time normally results in_______________?

A. decreasing the direct cost and increasing indirect cost
B. increasing the direct cost and decreasing the indirect cost
C. increasing the direct cost and indirect cost both
D. decreasing the direct cost and indirect cost both
✅ The correct answer is option B.