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

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

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

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Construction Planning and Management
Crash project duration is obtained by summing the

Crash durations for all the activities along the critical path obtained by taking into account the crash duration for all the activities
Crash durations for all activities
Normal durations for all the activities
Crash durations for all the activities along the critical path obtained by taking into account the normal duration for all the activities

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