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Chapter 12
1. CPM is:
(a) Critical Project Management
(b) Critical Path Management
(c) Critical Path Method
(d) Crash Project Method
2. Which of these is not correct?
(a) PERT is probabilistic in nature.
(b) CPM is deterministic in nature.
(c) CPM is event-oriented.
(d) CPM and PERT use similar terminology, but were developed independently.
3. Mark the wrong statement:
(a) A project is a set of activities, which can be performed in a certain logical sequence.
(b) A network is a graphic portrayal of interdependency relationships among the activities of
a project.
(c) An arrow representing an activity can have any length and shape.
(d) An activity cannot be represented by more than one arrow but an arrow can represent one
or more activities.
4. Point out what is not required.
While considering precedence relationships,
(a) all the predecessor(s) of an activity should be focussed on.
(b) only immediate predecessor(s) should be focussed on.
(c) redundant predecessors should be dropped.
(d) care must be taken that there is no logical fault it as may result in formation of a loop.
5. Mark the correct statement:
(a) The head event of an activity also represents tail event of its predecessor activity.
(b) Nodes should be numbered in such a way that, for every activity, the initial node bears a
lower number while final node bears a higher number.
(c) The event marking start of an activity is called head event and the event marking the end
is termed as tail-event.
(d) In drawing a network, it may happen that A precedes B, B precedes C and C precedes A.
6. Which of the following is not a rule of network construction?
(a) Each defined activity is represented by one and only one arrow.
(b) A network should have only one initial and one terminal node.
(c) Identical initial and final nodes can be used to identify two activities.
(d) Only as few dummy activities should be included as may be warranted.
7. Mark the wrong statement:
(a) Forward pass calculations yield the earliest and latest start and finish times of various
activities.
(b) The difference between latest and earliest finish times of an activity is its total float.
(c) Free float of an activity cannot exceed its total float.
(d) Determination of earliest and latest start time of various activities of a project is useful
for proper planning of their execution.
8. It is known that in a project, an activity 4-6 has duration of 6 days and total float of 3 days.
The E and L times at node 4 are 8 and 11 respectively while at node 6, both are equal to 17.
Which of the following is not a true statement about 4-6?
(a) Its free float is 3 days.
(b) Its independent float is 0.
(c) It is a critical activity.
(d) The ES of this activity is 8.
9. Mark the wrong statement:
(a) All activities on a critical path are critical activities.
(b) A project network may have none, one or more critical paths.
(c) A delay in a critical activity surely delays the completion of project.
(d) Each critical activity has identical earliest and latest start times.
10. Pick the wrong relationship:
(a) Interfering Float = Total Float – Free Float
(b) Total Float = Free Float + Independent Float
(c) Total Float  Free Float  Independent Float
(d) Free Float = Total Float – Head Event Slack
11. Which of the following is not correct in respect of PERT calculations?
(a) Expected time of an activity is a weighted average of three time estimates, a, m, and b
with respective weights of 1, 4 and 1.
(b) The completion time of an activity is assumed to follow normal distribution.
(c) The standard deviation of activity completion time is one-sixth of the excess of
pessimistic over optimistic time.
(d) The sum total of variances of critical activity times gives the variance of the overall
project completion time.
12. Given, expected duration of project = 47 days, variance = 9 days2. What is the probability of
not completing the project in 50 days?
Z
: 0.33
1.00
Area : 0.1293
0.3413
(a) 0.6293
(b) 0.8413
(c) 0.1587
(d) 0.3707
13. In the Question 12 above, what is the probability of completing the project within 3 days
more or less than the expected time?
(a) 0.5000
(b) 0.6826
(c) 0.2586
(d) 0.3174
14. Which of the following is not true about crashing?
(a) Always focus on critical path and choose between critical activities only.
(b) Crashing cost per day = (Crash cost – Normal cost)/(Normal time – Crash time).
(c) Of all activities of the project, choose the activity with least crashing cost.
(d) If there are multiple critical paths, crash them all.
15. Mark the wrong statement:
(a) An event, which represents the initiation of more than one activity, is called the burst
event.
(b) The longest path of a given project gives the maximum duration while its shortest path
indicates shortest duration.
(c) The resource allocation programmes aim to allocate the given resources in a manner that
the project completes in minimum time.
(d) A non-critical activity may or may not have any free float.