Construction Planning and Management
A wheeled tractor hauling unit is working on firm earth. The total loaded weight distribution of this unit is:Drive wheels: 25000 kgScraper wheels: 10000 kgIf the coefficient of traction for wheeled tractor on firm earth is 0.5, the rimpull which this tractor can exert without slipping is

12500 kg
5000 kg
10000 kg
22500 kg

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Construction Planning and Management
Total float for any activity is defined as the difference between

Its latest start time and earliest start time
Its earliest finish time and earliest start time for its successor activity
Its latest start time and earliest finish time
Its latest finish time and earliest start time for its successor activity

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

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