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Construction Planning and Management

Construction Planning and Management
If a is the optimistic time, b is the pessimistic time and m is most likely time of an activity, the expected time of the activity, is

(a + 5m + b)/6
(a + m + b)/6
(a + 2m + b)/6
(a + 4m + b)/6

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Construction Planning and Management
Which of the following is a weakness of bar chart?

Interdependencies of activities
All of these
Project progress
Uncertainties

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Construction Planning and Management
The grade resistance factor for an earth moving machine can be obtained by multiplying grade percentage by a factor approximately equal to

2 kg/tonne
20 kg/tonne
6 kg/tonne
9 kg/tonne

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Construction Planning and Management
The time corresponding to minimum total project cost is

Crash time
Optimistic time
Between normal time and crash time
Normal time

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Construction Planning and Management
The probability of completion of any activity within its expected time is

0.841
1
0.5
0.999

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Construction Planning and Management
A tractor whose weight is 20 tonnes has a drawbar pull of 2500 kg, when operated on a level road having a rolling resistance of 30 kg per tonne. If this tractor is operated on a level road having a rolling resistance of 40 kg per tonne, then the drawbar pull of the tractor will

Reduce by 200 kg
Reduce by 250 kg
Increase by 200 kg
Increase by 250 kg

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