Critical paths and float

Critical paths and float Quiz

Spec 4.3–4 · Edexcel International A Level Maths: Quiz

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5 questions, one answer each

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1. In a forward pass, two activities arrive at an event. How is its earliest event time found?
- A. The smaller of the two arrival times
- B. The mean of the two arrival times
- C. The larger of the two arrival times
- D. The sum of the two arrival times
2. In a backward pass, two activities leave an event. How is its latest event time found?
- A. The smaller of the two values $l(j)-d$
- B. The larger of the two values
- C. The mean of the two values
- D. The earliest event time
3. Which is the correct formula for the total float of an activity from event $i$ to event $j$ with duration $d$ ?
- A. $l(i)-e(j)-d$
- B. $e(j)-l(i)+d$
- C. $l(j)+e(i)-d$
- D. $l(j)-e(i)-d$
4. An activity has a total float of 0. Which statement must be true?
- A. It is the shortest activity
- B. Any delay to it delays the whole project
- C. It can start at any time
- D. It has no predecessors
5. An activity from event 2 to event 5 lasts 6 days. $e(2)=4$ and $l(5)=13$ . What is its total float?
- A. 3 days
- B. 2 days
- C. 7 days
- D. 9 days