Question

Which of the following statement is/are correct?

1) An activity is in between two node numbers, which need not be in an increasing order in the activity progress sequence.

2) The length of the arrow in a network has certain significance.

3) Concurrent activities are mutually independent and can possibly be taken up simultaneously.
1. 1 only
2. 3 only 
3. 2 only
4. 1, 2 and 3

Answer 1

Correct Answer - Option 2 : 3 only 

An activity is an actual performance of the task which requires both time and cost resources for its completion. Ex: Excavation, casting of beam, erection of turbines are some activities.

Characteristics of an activity in a network are:

1. An activity lies between two nodes. Number of nodes increase as the activity progresses.

2. Length of arrow has no significance in an activity.

3. An activity can start only when its tail event occurs.

4. An activity cannot occur more than once in the network.

Concurrent activities:

1. They can be completed simultaneously.

2. They can shorten the duration of project.

3. They are mutually independent i.e. delay in one activity does not affect the completion of another activity.