1. You have received three estimates for your project activity. The optimistic estimate is 245 days, the pessimistic estimate is 269 days, and the most likely estimate is 257 days. This particular activity is critical to the project, and your project sponsor wants to know with 95 percent certainty how long it will take to complete this activity. Which of the following do you tell the project sponsor?
A. 265 days to 273 days
B. 253 days to 261 days
C. 261 days to 277 days
D. 249 days to 265 days
1. 你获得项目活动的三种估算。最乐观估算为245 天，最悲观估算为269 天，最可能估算为257 天。这个活动对项目非常关键，你的项目发起人希望获得关于活动历时95%的确定结果，你将向发起人汇报：
A. 265至273天
B. 253至261天
C. 261至277天
D. 249至265天

参考答案：D。平均值为257 天，标准差为4 天。计算方法参见《PMBOK 指南》第5 版第170-171 页

2．According to learning curve theory, when many items are produced repetitively
A. Production equipment that requires less operator training lowers unit costs
B. Unit costs decrease as production rates increase
C. Unit costs decrease in a regular pattern as more units are produced
D. Costs of training increase as the level of automation increases
2. 根据学习曲线理论（learningcurve theory），当很多项是重复生产时：
A．需要较少操作员培训的生产设备可以降低单位成本
B．随着生产率的提高，单位成本减少
C．随着生产更多的单位，单位成本有规律的降低
D．随着自动化程度的增加，培训成本也增加

参考答案：C。选项C 就是学习曲线的定义，学习曲线通俗的说法就是“熟能生巧”。

3．The flexibility of scheduling is by
A. Free float
B. Total float
C. ADM
D. Crashing
3. 进度安排的灵活性是由（）决定的？
A. 自由时差
B. 总时差
C. 箭线图法
D. 赶工

参考答案：B。参见《PMBOK 指南》第5 版第176-177 页

4. You have received estimates for one of your project tasks as follows: The pessimistic estimate is 24 days, the optimistic estimate is 18 days, and the most likely estimate is 20 days. What is the standard deviation?
A. 1
B. 0.33
C. 0.67
D. 1.5
4. 你收到项目任务的估算如下，最悲观24 天，最乐观18 天，最可能20 天，一个标准差是多少？
A. 1
B. 0.33
C. 0.67
D. 1.5

参考答案：A。计算方法参见《PMBOK 指南》第5 版第170-171

5. Which of the following choices include all the tools and techniques to the process of estimate activity duration?
A. Analogous estimating, parametric estimating and three-point estimating
B. Expert judgment, analogous estimating, parametric estimating and three-point estimating
C. Expert judgment, analogous estimating, parametric estimating three-point estimating durations and reserve analysis
D. Expert judgment, analogous estimating, parametric estimating three-point estimating durations and bottom-up estimating
5. 估算活动持续时间的工具方法包括：
A. 类比估算、参数估算、三点估算
B. 专家判断、类比估算、参数估算、三点估算
C. 专家判断、类比估算、参数估算、三点估算和储备分析
D. 专家判断、类比估算、参数估算、三点估算和自下而上估算

参考答案：C。参见《PMBOK 指南》第5 版第166 页

6．When is the project completion changed?
A. Compression of Critical Path
B .When the use of contingency reserve is not allowed
C. At the time of project resources are decreased
D. No float
6. 什么时候项目的完成会发生变动:
A．关键路径压缩时
B．当不允许使用应急储备时
C．当减少项目资源的时候
D．没有总时差的情况下

参考答案：A。关键路径决定项目的最短工期，当关键路径压缩，项目的工期就会缩短

7．Resource leveling generally
A. Increases the total project cost.
B. Delays project completion.
C. Requires less resources
D. Requires more resources
7. 资源平衡通常:
A．增加整个项目成本
B．拖延项目的完成
C．需要较少的资源
D．需要更多的资源

参考答案：B。资源平衡的前提是资源不足，资源平衡会导致工期延长。参见《PMBOK 指南》第5 版第179 页

8．During the duration compression you increased the resources to a critical path activity or activities. What must be further considered?
A. The delay of the other activity
B. New critical activities come out
C. The resources assigned to the other tasks on the critical path
D. The longest task which resides in the schedule
8.在历时压缩过程中，你为关键路径活动增加了资源。接下去必须考虑什么呢?
A．其他活动的拖延
B．产生新的关键活动
C．分配到关键路径其他任务的资源
D．进度计划中工时最长的任务

参考答案：B。进度压缩是压缩关键路径时间，次关键路径可能会成为新的关键路径

9．Once the durations of the activities are calculated for a completed network,
a forward pass and a backward pass will provide:
A. the float of the activities
B. the early start and late start only
C. the critical path
D.A and C
9.一旦为一个完整网络计算出活动历时，顺推法与逆推法就会提供，
A．活动的总时差
B．只有最早开始与最晚开始时间
C．关键路径
D. A和C

参考答案：D。参见《PMBOK 指南》第5 版第176-177 页

10．A project has three critical paths. What difference does this make to the project?
A. It makes it easier to manage
B. It increases the project risk
C. It requires more people
D. The situation is not possible
10. 项目有三条关键路径。这对项目有什么不同吗?
A. 它使项目更易于管理
B. 它增加了项目风险
C. 它需要更多的人员
D. 这种情况是不可能的
A task has an early start of day three, a late start of day 13, an early finish
of day nine, and a latefinish of day 19. What is the task’s float?
A. 10
B. 6
C. 3
D. 19

参考答案：B。有三条关键路径，意味着任何一条延误，都会导致项目延误，风险较高。参见《PMBOK 指南》第5 版第176-177 页