Construction Planning and Management
Earliest finish of an activity is always

Greater than or equal to earliest event time of the following node
Less than or equal to earliest event time of the following node
Less than earliest event time of the following node
Greater than earliest event time of the following node

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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

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

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