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

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

Only on activities lying on the original critical path and having flatter cost slopes
On all the activities
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

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Construction Planning and Management
Assertion A: For a given depth of cut, the output of a power shovel can be increased by decreasing the angle of swing.Reason R: If the angle of swing is decreased, the cycle time will be decreased.

Both A and R is true and R is the correct explanation of A
A is false but R is true
Both A and R is true but R is not the correct explanation of A
A is true but R is false

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