Civil Engineering MCQAE Level Civil Engineering
In a CPM network, a critical activity is one with:
Construction ManagementCritical ActivityMEDIUM
Choose the correct answer
A
Maximum resource requirement
B
Zero total float
C
Maximum duration among all activities
D
Longest predecessor chain
Correct Answer
B. Zero total float
Why is this the answer?
Critical activities lie on the critical path — any delay increases project duration. They have zero total float (TF = LS − ES = LF − EF = 0). Non-critical activities have positive TF and can be delayed within limits without delaying the project.
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