Pert Cpm- Operations Research 1

15 Questions  I  By Dmmarathe
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This test is on the topic PERT CPM, subject Operations Research. It is 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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Questions and Answers

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  • 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 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. 
    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.


  • 5. 
    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.


  • 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 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.


  • 7. 
    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.


  • 8. 
    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.


  • 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 critical activity surely delays the completion of project.

    • D. 

      Each critical activity has identical earliest and the 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 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.


  • 12. 
    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


  • 13. 
    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. 

      0.5000

    • 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 that 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 the 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.


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