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GATE CE 2021: Building Materials & Construction Management#6

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Question 1

For the given network, after 15 days the updated status of the projects was given as:
Activities 1-2, 2-5, and 1-3 are completed.
Activity 2-4 has 5 days remaining.
Activity 5-8 has 3 days remaining.
Activity 5-6 has 2 days remaining.
Activity 3-6 has 6 days remaining.

The completion time of the project is

Question 2

Which of the following event can have longest delay without affecting the project duration?

Question 3

A father notes that his teenage son uses the telephone. He takes no less than 5 minutes for a call and sometimes as much as an hour. 20 minutes calls are more frequent that calls of any other duration. Considered as a PERT activity a phone calls’ expected duration in minutes is

Question 4

The probability distribution taken to represent the completion of time in PERT analysis is

Question 5

In the network shown below, the number of the arrow gives the duration of the activity. The earliest expected time for event 6 to be attained is

Question 6

A, B, C, D and E are the 5 activities along the unique path of a AOA network of activities. Their characteristic are as under :

What is the possible range of project duration (in days)?
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Jun 5ESE & GATE CE