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

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Construction Planning and Management
Latest start of an activity is always

less than or equal to latest event time of preceding node
greater than or equal to latest event time of preceding node
less than latest event time of preceding node
equal to latest event time of preceding node

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