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B. 只能用来估算工作量水平 C. 只能用于PDM
D. 只使用历史估算数据来计算方差
11．Float, or slack, is a measure of A. Free time
B. Scheduling constraint C. Resource availability D. Scheduling flexibility 浮动或时差是用来衡量 A. 自由时间 B. 进度的限制 C. 拥有的资源 D. 进度的灵活性
12. 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
计算出已完工网络的活动历时后，前推法和逆推法可以提供： A 活动浮动时间
B 只有最早开始日期和最迟开始日期 C 关键路径 D A和C。
13. See the figure below, what is the critical path? a) A-B-G b) C-G c) C-D d) E-F
A 3 E 4 B 4 C 8 F 3 D 1 G 2 用下列图示数据，什么是关键路线 A. A-B-G B. C-G C. C-D D. E-F
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14. Assume that you have a network where an activity on the critical path can be crashed by two weeks. If that activity is actually crashed by two weeks, then: A. The project’s schedule will be reduced by 2 weeks
B. The available slack on the non-critical paths will increase C. Crashing this activity may change the critical path D. The project’s schedule will be increased by 2 weeks 假定你的项目网络中，关键路线上的某活动可能被加快两周完成。如果实际上该活动确实提前两周完成了，则:
A. 项目进度将被缩短2周
B. 非关键路线上的可用的时差将增加 C. 加快该项活动可能改变关键路线 D. 项目进度将增加2周
15. The critical path time needs to be reduced by 20%. You may take the following actions EXCEPT --
A. Adding resources
B. Crashing time schedule C. Eliminating float D. Paralleling activities
当需要减少20%关键路径时间时，你可以采取下列的行动，但?除外。 A. 增加资源 B. 进度上赶工 C. 消除浮动时间 D. 并行安排活动
16. Consider a project with a critical path that consists of four consecutive activities: A, B, C and D. The time estimates for these activities, in weeks, are shown below. Using PERT, the expected time for the critical path is: A. 15 weeks B. 17.5 weeks C. 18 weeks D. 20 weeks 活动
乐观估算
最可能估算
悲观估算
A 2 3 4 B 4 5 6 C 5 5.5 6 D 4 4 4
思考某项目的关键路线，该项目由四项相继活动A, B, C 和 D组成，这些活动的时间估算周如下图所示，用三点估算进行计算，关键路线的预期时间是 A. 15周
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B. 17.5周 C. 18周 D. 20周
17. During planning you sit down and estimate the time needed for each task and total them to come up with the project estimate. This duration is what you commit to complete the project. What is wrong with the scenario?
A. The team did not create the estimate and estimating takes too long using that method. B. The team did not create the estimate and a network diagram was not used. C. The estimate is too long and should be created by management
D. The project estimate should be the same as the customer’s required completion date 在进行计划编制时，你坐下来对每项任务所需的时间进行估算，这些时间的总和就是项目估算。这个历时就是你承诺完成项目的时间。以上描述有什么错误？ A. 项目小组没有参与估算，而且这种方法耗时太长。 B. 项目小组没有参与估算，而且没有使用网络图。 C. 估算时间太久，应该由管理层完成。
D. 项目估算应该和客户要求的完工日期吻合。
18. The term ―planning‖ and ―scheduling‖ are sometimes used interchangeably within a project, however, they are very different activities in a project. Which of the following are scheduling activities?
A. The project will be completed by a team of international specialists, co-located in six countries, using workgroup tools available over the internet
B. The vendors, for the widget component, must be selected by end of first quarter
C. Due to the high cost and lengthy timeframes of producing components in-house, several of the components will be contracted out to vendors D. Both B and C
计划和进度在项目中有时可以互换使用，但他们是两个不同的活动。以下哪个是进度活动？ A. 项目由分布在六个国家的国际专家团完成，通过应用互联网技术进行团队合作 B. 供应商的选择必须在第一季度完成
C. 由于高成本和较长的生产时间跨度，有几部分的组件将外包 D. B和C
19. The amount of time that an activity can be delayed from its early start without delaying the project end date is called: A. Free Float B. Total Float C. Float D. b and c
一项活动可以从其最早开始时间延期，而不影响项目结束时间的那一段时间被称为？ A. 自由浮动。 B. 总浮动。 C. 浮动。 D. b和c。
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20. In a project that has never been done before, the project manager must select one or more methods of estimating task duration. What is the more reliable method under this described situation?
A. Historical data B. Expert judgment
C. Parametric learning curves D. Estimating manuals
这是一个以前从来没有从事过的项目类型，项目经理必须选择一种或几种任务工期估算方法。在这种情况下，下列哪一种方法是最可靠的？ A. 历史数据 B. 专家判断 C. 参数学习曲线 D. 估算手册
Answers： 1. D 11. D
2. A 12. D 3. C 13. B 4. B 14. C 5. C 15. C 6. A 16. B 7. C 17. B 8. A 18. B 9. D 19. B 10. A 20. B Chapter 7 Cost
1. A project's payback period ends when: A. Profit maximum is realized. B. Unit profit is realized.
C. Monthly revenue exceeds monthly costs.
D. Cumulative cash inflow equals cumulative cash outflow. 项目的投资回收期应该在下列哪种情况下可认为结束： A．利润最大化的实现。 B．单位利润实现时。
C．月收入超过月成本开支。
D．累计现金流入等于累计现金流出。
2. It is argumentative whether project managers actually control costs. Which of the following is the most common element over which the project manager may have some degree of control? A. Direct labor dollars B. Direct labor hours C. Overhead rates D. Procurement costs
项目经理实际所能控制的成本是个争论点，以下哪一项是项目经理有控制权的内容? A. 直接人工费用 B. 直接人工工时 C. 管理费费率 D. 采购成本
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3. Which is the most conservative of the work completion rules: A. 0-50-100 Rule B. 0-100 Rule C. 0-20-100 Rule D. 100-0 Rule
以下哪项是最为保守的工作完工原则？ A. 0-50-100 原则 B. 0-100原则 C. 0-20-100原则 D. 100-0原则
4. One common way to compute estimate at completion (EAC) is to take the project budgeted-at-completion and:
A. Divide it by the schedule performance index. B. Multiply it by the schedule performance index. C. Multiply it by the cost performance. D. Divide it by the cost performance index. 正确计算EAC的方法是把BAC A. 除以SPI （进度绩效指数） B. 乘以SPI（进度绩效指数） C. 乘以CPI（成本绩效指数） D. 除以CPI（成本绩效指数）
5. A CPI of .80 means?
A. As of now we expect the total project cost of 80% more than planned B. When the project is completed we will have spent 80% more C. Your project is only progressing at 80% of that planned
D. Your project is only getting 80 cents out of every dollar invested 成本绩效指数（CPI）为 .80的意思是： A. 目前我们预期总成本超过计划的80%。 B. 项目完成是我们将超支80%。
C. 你的项目现在已经进行了计划的80%。
D. 你项目投入的每一美元只收到80美分的效果。
6. Using the PMBOK definition of contingency reserve, which of the following statements about contingency reserves is false?
A. A contingency reserve is a separately planned quantity used to allow for future situations
which may be planned for only in part.
B. Contingency reserves may be set aside for known unknowns. C. Contingency reserves may be set aside for unknown unknowns.
D. Contingency reserves are normally included in the project's cost and schedule baselines. 按项目管理知识体系对应急储备的定义，以下哪个关于应急储备的陈述是错误的？ A. 应急储备是单独计划的资金用于未来那些可能只计划了一部分的情况。 B. 应急储备为已知未知的境况而准备的资金。
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