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.

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

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Construction Planning and Management
Output of a bulldozer is(i) Increased if drawbar HP of the tractor is increased for a given hauling distance(ii) Decreased if drawbar HP of the tractor is increased for a given hauling distance(iii) Increased if the hauling distance is increased for a given drawbar HP of the tractor(iv) Decreased if the hauling distance is increased for a given drawbar HP of the tractor

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

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Construction Planning and Management
Whenever an activity has zero total float, then

Free float and independent float both need not be zero
Free float and independent float both must be zero
Independent float must be zero but free float need not be zero
Free float of the activity must be zero but independent float need not be zero

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Construction Planning and Management
The reduction in project time normally results in

Decreasing the direct cost and indirect cost both
Decreasing the direct cost and increasing indirect cost
Increasing the direct cost and decreasing the indirect cost
Increasing the direct cost and indirect cost both

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