Question 1

-Use the network diagram and activity lengths in the nodes to determine the early start time for activity D.

Accepted Answer

A)  8 
B)  13 
C)  14 
D)  21

Question 2

Use the information in the table to determine the late start time for Activity E. $$\begin{array} { | l | l | l | l | l | l | l | } 
\hline & & & \text { Early } & \text { Early } & \text { Late } & \text { Late } \
\cline { 5 - 7 } \text { Task } & \text { Predecessor } & \text { Duration } & \text { Start } & \text { Finish } & \text { Start } & \text { Finish } \
\hline \mathrm { A } & - & 8 & & & & \
\hline \mathrm { B } & \mathrm { A } & & & & 14 & \
\hline \mathrm { C } & \mathrm { A } & & & 23 & 8 & \
\hline \mathrm { D } & \mathrm { C } , \mathrm { B } & 6 & 23 & & 26 & \
\hline \mathbb { E } & \mathrm { C } & & & 32 & & \
\hline \mathbb { F } & \mathrm { D } , \mathrm { E } & & 32 & & & 38 \
\hline
\end{array}$$

Accepted Answer

A)  Day 23 
B)  Day 26 
C)  Day 32 
D)  Day 17

Question 3

Use the values in the table to calculate activity durations and variances for the project.What is the likelihood of finishing this project within 47 days? $$\begin{array} { | l | l | l | l | l | } 
\hline \text { Activity } & \text { Predecessor } & \text { Optimistic } & \text { Likely } & \text { Pessimistic } \
\hline \text { A } & - & 5 & 8 & 11 \
\hline \text { B } & \text { A } & 15 & 20 & 25 \
\hline \text { D } & \text { A } & 7 & 9 & 12 \
\hline \text { D } & \text { A } & 12 & 16 & 20 \
\hline \text { F } & \text { B, D } & 8 & 11 & 15 \
\hline \text { G } & \text { C } & 13 & 17 & 22 \
\hline
\end{array}$$

Accepted Answer

The answer of Use the values in the table to...

Question 4

A merge activity has two or more immediate predecessors.

Accepted Answer

A) True 
 B)False

Question 5

Phoebe B.Beebee is constructing a canal for the annual canoe races and has identified eleven activities that are required to complete this important project.She calculated early and late start times and early and late finish times but spilled coffee all over her printout.Use the remaining information to reconstruct the table for Phoebe B.Beebee and her new canoe canal.

Accepted Answer

The answer of Phoebe B.Beebee is constructing a canal for...

Question 6

A project has the precedence requirements and activity durations shown in the table.After he draws the network,the project manager decides that activities E and F can be represented by a hammock activity.What are the duration and the early start time associated with this hammock activity? $$\begin{array} { | l | l | l | } 
\hline & \text { Time } & \text { Predecessor } \
\hline \mathrm { A } & 7 & \
\hline \mathrm { B } & 8 & \mathrm {~A} \
\hline \mathrm { C } & 13 & \mathrm {~B} \
\hline \mathrm { D } & 8 & \mathrm { C } \
\hline \mathrm { E } & 7 & \mathrm {~A} \
\hline \mathrm { F } & 6 & \mathrm { E } \
\hline \mathrm { G } & 6 & \mathrm {~A} \
\hline \mathrm { H } & 11 & \mathrm { G } \
\hline \mathrm { I } & 12 & \mathrm { H } \
\hline \mathrm { T } & 14 & \mathrm { D } , \mathrm { F } , \mathrm { I } \
\hline
\end{array}$$

Accepted Answer

A)  13, 36 
B)  7, 0 
C)  13, 7 
D)  7, 14

Question 7

-Use the network diagram and activity lengths in the nodes to determine the early finish time for activity G.

Accepted Answer

A)  26 
B)  25 
C)  24 
D)  23

Question 8

The least amount of float is found:

Accepted Answer

A)  In a resource-limited schedule. 
B)  After a burst activity. 
C)  On the critical path. 
D)  After a merge activity.

Question 9

Use the values in the table to calculate activity durations and variances for the project.What is the likelihood that the project takes between 60 and 55 days to complete?

Accepted Answer

The answer of Use the values in the table to...

Question 10

Ray's shipment of materials hit every red light and traffic jam on the way to the site.Upon arrival,half of the material was judged defective,necessitating a trip back to the supplier,and then the same arduous journey back to the site once the new materials were loaded.Traffic was a little better on the second round but the flat tire and subsequent repair caused as much if not more delay than the first trip.In the final analysis:

Accepted Answer

A)  The project activity of Material Delivery was pretty close to the optimistic estimate. 
B)  The project activity of Material Delivery was pretty close to the most likely estimate. 
C)  The project activity of Material Delivery had a much higher variance than anticipated. 
D)  The project activity of Material Delivery was pretty close to the pessimistic estimate.

Question 11

-Based on the activity network pictured,what is the BEST statement?

Accepted Answer

A)  Before starting Activity C, Activity A and Activity B must be completed. 
B)  Before starting Activity D, Activity A and Activity B need to be completed. 
C)  Before starting Activity E, Activity A and Activity B need to be completed. 
D)  Before starting Activity C, Activity A and Activity D must be completed.

Question 12

The late start time should be calculated using a forward pass through the network.

Accepted Answer

A) True 
 B)False

Question 13

An activity has an expected duration and an expected cost.Another name for an activity is a(n):

Accepted Answer

A)  Work package. 
B)  Node. 
C)  Critical path. 
D)  Event.

Question 14

What is the early start time for Activity G given the activity times and precedence requirements shown in the table? $$\begin{array} { | l | l | l | } 
\hline \text { Activity } & \text { Time } & \text { Predecessor } \
\hline \text { A } & 5 & - \
\hline \text { B } & 7 & - \
\hline \mathrm { C } & 8 & \text { A } \
\hline \mathrm { D } & 7 & \text { A } \
\hline E & 4 & \text { B } \
\hline \text { F } & 8 & \text { C, D } \
\hline G & 9 & \text { E, F } \
\hline \mathrm { H } & 7 & \mathrm { G } \
\hline
\end{array}$$

Accepted Answer

A)  22 
B)  21 
C)  20 
D)  19

Question 15

Concurrent activities are:

Accepted Answer

A)  Activities that must be done one after the other. 
B)  Activities that can be performed at the same time. 
C)  Activities that use labor from the same group of workers. 
D)  Activities that use resources from the same resource pool.

Question 16

What does a network diagram illustrate and why are they important in project management?

Accepted Answer

The answer of What does a network diagram illustrate and...

Question 17

An activity has an optimistic time estimate of 25 days,a most likely estimate of 29 days,and a pessimistic estimate of 34 days.What is the expected duration of the activity?

Accepted Answer

A)  Less than 31 days but greater than or equal to 29 days 
B)  Less than 29 days but greater than or equal to 27 days 
C)  Less than 27 days but greater than or equal to 25 days 
D)  Less than 25 days

Question 18

What is the slack time for Activity B given the activity times and precedence requirements shown in the table? $$\begin{array} { | l | l | l | } 
\hline \text { Activity } & \text { Time } & \text { Predecessor } \
\hline \text { A } & 5 & - - \
\hline \text { B } & 7 & - - \
\hline \text { C } & 8 & \text { A } \
\hline \text { D } & 7 & \text { A } \
\hline \text { E } & 4 & \text { B } \
\hline \text { G } & 8 & \text { C, D } \
\hline \text { H } & 9 & \text { E, F } \
\hline
\end{array}$$

Accepted Answer

A)  10 
B)  9 
C)  8 
D)  7

Question 19

These can be located by doing a backward pass through a network.

Accepted Answer

A)  Critical paths 
B)  Merge activities 
C)  Successors 
D)  Burst activities

Question 20

A gentleman farmer maniacally works on academic projects to raise funds for his true passion,farming.He has identified seven tasks and developed three time estimates (all in days)of the next big project on the farm,replacing the fence at the comedy pasture.Tasks,precedence requirements,and time estimates are shown in the table.What is the standard deviation of the project's critical path? $$\begin{array} { | l | l | l | l | l | } 
\hline \text { Activity } & \begin{array} { l } 
\text { Optimistic }
\end{array} & \begin{array} { l } 
\text { Most Likely }
\end{array} & \begin{array} { l } 
\text { Pessimistic }
\end{array} & \
\hline \text { time } & \text { time } & \text { time } & \text { Predecessor } \
\hline \text { Sorner Posts } & 4 & 5 & 6 & - \
\hline \text { Dig Holes } & 10 & 12 & 14 & \text { Corner Posts } \
\hline \text { Plant Posts } & 11 & 14 & 17 & \text { String Line } \
\hline \text { Weld Top Bar } & 8 & 11 & 14 & \text { String Line } \
\hline & & & & \text { Dig Holes, Plant } \
\hline \text { Paint } & 9 & 11 & 13 & \text { Posts } \
\hline \text { Tack Wire } & 9 & 12 & 16 & \text { Weld Top Bar } \
\hline
\end{array}$$

Accepted Answer

A)  1.33 days 
B)  1.56 days 
C)  1.25 days 
D)  1.75 days

Exam 9: Project Scheduling: Networks,Duration Estimation,and Critical Path