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

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Construction Planning and Management
Free float is mainly used to

Identify the activities which can be delayed without affecting the total float of either the preceding or succeeding activities
Establish priorities
Identify the activities, which can be delayed without affecting the total float of succeeding activity
Identify the activities which can be delayed without affecting the total float of preceding activity

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

Independent float must be zero but free float need not be zero
Free float and independent float both need not be zero
Free float and independent float both must 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
During the construction period, price variation clause in contracts caters to

Variation in cost in materials element, labour element and petrol-oil-lubricant element
Variation in total cost of the project on an ad hoc basis
Rate of inflation
Increase in rates of only important materials

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