If t is the duration of an activity, t1 is the latest finish possible moment of its preceding activity and t2 is the earliest start possible moment, the independent float of the activity is
(t1 - t2) - t
t - (t1 - t2)
(t1 + t2) - t
t + (t1 - t2)
Correct Answer :
A. (t1 - t2) - t
Related Questions
Select the incorrect statement.
Earliest start of an activity is the early event time of the node it leaves.
Latest finish of an activity is the late event time of the node it enters.
Latest start of an activity is its latest finish minus its duration.
None of the above
Modular co-ordination of construction means proper
Planning
Designing
Execution
All the above
A critical ratio scheduling
Determines the status of each activity
Adjusts automatically changes in activity progress
Is a dynamic system
None of these
Mobilization advance up to 10% of the cost of work is given to a contractor
On commencement of work at site for payment of loan taken by him
For the purchase of construction materials
For the payment of advances to labour and other staff
For all activities required to start the work at site on finalization of the contract document
Critical path
Is always longest
Is always shortest
May be longest
May be shortest
A contractor has two options;
(I): Invest his money in project A or
(II): Invest his money in project B.
If he decides to invest in A, for every rupee invested, he is assured of doubling his money in ten years. If he decides to invest in B, he is assured of making his money 1.5 times in 5 years. If the contractor values his money at 10% interest rate, he
Should invest in neither of the two projects
Could invest in either of the two projects
Should invest in project A
Should invest in project B
Bar charts are suitable for
Minor works
Major works
Large projects
All the Above
For the supply of materials for concrete, form work reinforcing and placing of concrete, removal of form work and curing of concrete, number of bar(s) required on bar chart, is
1
2
3
4
Consider the following statements: In the bar chart planning
1. Interdependence of the operations cannot be portrayed.
2. Progress of work can be measured.
3. Spare time of the activities can be determined.
4. Schedule cannot be updated. Of these statements
1, 2 and 3 are correct
1 and 4 are correct
2, 3 and 4 are correct
1, 2 and 4 are correct
PERT analysis is based on
Optimistic time
Pessimistic time
Most likely time
All the above
Grader is used mainly for
Trimming and finishing
Shaping and trimming
Finishing and shaping
Finishing, shaping and trimming
In time-cost optimization of a project, crashing is done.
On all the activities
On all the activities lying on the critical path
Only on activities lying on the original critical path and having flatter cost slopes
On original critical activities and those that become critical at any stage of crashing in the order of ascending cost slope
The rated loads of lifting cranes, as percentage of tipping load at specified radius, for crawler-mounted and pneumatic tyre-mounted machines would be respectively
80 and 90
90 and 80
85 and 75
75 and 83
Assertion (A): Activity 57 is critical. Reason (R): Earliest finish time and latest finish time for events 57 are same Select the correct answer.
A is correct but R is not correct
R is correct but A is not correct
Both A and R is correct
Both A and R is incorrect
The three time estimates for the activities of the network shown in the given figure are shown above their arrows. The earliest expected time for the event 4, is
19
14
24
None of these
Critical path method
Is an improvement upon bar chart method
Provides a realistic approach to daily problems
Avoids delays which are very common in bar charts
All the above
Consider the following statements: In the critical path method of construction planning, Free Float can be.
1. Greater than Total Float.
2. Greater than Independent Float
3. Equal to Total Float.
4. Less than Independent Float. Of these statements
1 and 4 are correct
2 and 3 are correct
1 and 4 are correct
1 and 2 are correct
Select the incorrect statement.
Start float and finish float are always equal.
Total float can be either start float or finish float.
Start float and finish float need not be equal.
Start float and finish float are the differences between activity times and not event times.
Pick up the correct statement from the following:
Optimistic time estimate refers to activities
Pessimistic time estimate refers to activities
Most likely time estimate refers to activities
All the above
Updating may result in
Change of critical path
Decrease of project completion time
Increase of project completion time
All of the above
For completion of a project, the critical path of the network represents
Minimum time
Maximum time
Maximum cost
Minimum cost
If TL is the latest allowable event occurrence time, total activity slack(s), is equal to
LST-EST
LFT-EFT
TL-EFT
All the above
An event is indicated on the network by a number enclosed in
A circle
A square
A triangle
All the above
An earth moving equipment costs Rs. 5,00,000 and has an estimated life of 10 years and a salvage value of Rs. 50,000. What uniform annual amount must be set aside at the end of each of the 10 years for replacement if the interest rate is 8% per annum and if the sinking fund factor at 8% per annum interest rate for 10 years is 0.069?
Rs. 31050
Rs. 34500
Rs. 37950
Rs. 50000
Pick up the PERT event from the following:
Digging of foundation started
Digging of foundation completed
Laying of concrete started
All the above
Preliminary project report for a road project must contain
The detailed estimated cost based on detailed design
The several alternatives of the project that have been considered
The soil survey, traffic survey, concept design and approximate cost
The contract documents for inviting tenders
Slack time refers to
An activity
An event
Both event and activity
None of the above
Various activities of a project, are shown on bar charts by
Vertical lines
Horizontal lines
Dots
Crosses
Consider the following features/factors:
1. Projects are of the non-repetitive type
2. Time required need not be known
3. Time required is known precisely
4. Events have been established for planning
5. Emphasis is given to activities of project PERT is preferred for planning because of
1, 2 and 4
3, 4 and 5
1, 3 and 4
1, 2 and 5
CPM is
Synthesising in concepts
Is built of activities oriented programme
Is based on time estimate
All the above