# Pert Cpm- Operations Research 1

15 Questions  I  By Dmmarathe
This test is on the topic PERT CPM, subject Operations Research. Itis a multiple- choice test. Questions: 15 questions Marks: 15Time: 20 mins Remember: You need to click on Submit Answer after selecting an option for each question. Click on Start Quiz to begin

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 1 Given, expected duration of project = 47 days, variance = 9 days. 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
 2 Mark the wrong 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 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.
 3 Mark the wrong statement:
 A. A project is a set of activities that can be performed in a certain logical sequence.
 B. A network is a graphic portrayal of independency relationship 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 Mark the wrong statement.
 A. Forward pass calculations yield the earliest and the latest start and finish times of various activities.
 B. The difference between the latest and the earliest finish times of an activity is its total float.
 C. Free float of an activity cannot exceed its total float.
 D. Determination of the earliest and the latest start time of various activities of a project is useful for proper planning of their execution.
 5 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 initial and one terminal node.
 C. Identical initial and final nodes can identify two activities.
 D. Only as few dummy activities should be included as is warranted.
 6 Which of the following is not correct in respect of PERT calculations?
 A. Expected time of an activity is a weighted average of three times 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.
 7 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 in it as may result in formation of a loop.
 8 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 critical activity surely delays the completion of project.
 D. Each critical activity has identical earliest and the latest start times.
 9 Given, expected duration of project = 47 days, variance = 9 days. What is the probability of completing the project within three days more or less than the expected time?      Z      :   0.33           1.00     Area :   0.1293       0.3413
 A. 0.5
 B. 0.6826
 C. 0.2586
 D. 0.3174
 10 CPM is:
 A. Critical Project Management
 B. Critical Path Management
 C. Critical Path Method
 D. Crash Project Method
 11 It is known that in a project, an activity 4-6 has duration of six days and total float of three days. The E and L times at node 4 and 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 three days.
 B. Its independent float is 0.
 C. It is a critical activity.
 D. The ES of this activity is 8.
 12 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
 13 Mark the wrong statement.
 A. The longest path of a given project gives the maximum duration while its shortest path indicates the shortest duration.
 B. The resource allocation programmes aim to allocate the given resources in a manner that the project completes in minimum time.
 C. A non-critical activity may or may not have any free float.
 D. An event that represents the initiation of more than one activity is called the burst event.
 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 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.
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