New PMP Question & Answers with explanation

You are a senior project management practitioner. You have been given a chemical manufacturing project that could potentially contaminate the groundwater in the neighboring residential community. After detailed analysis, you learn that the impact could be severe in the long run. If the sponsor of the project wants to complete this project as soon as possible, you must:
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You have found you do not yet have an accurate estimate of the number and skill levels of resources needed for the scheduled activity Build Racks for Data Center. You need this estimate for presentation to your Human Resources department later in the week. You have decided to decompose the Build Racks for Data Center activity into smaller components such as take equipment out of box, review equipment for completeness, build frame, and install rails. Then you plan to estimate the resources for each smaller component and combine those estimates into an aggregate. This is an example of:
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A functional manager in your organization has recently filed a complaint against a junior project manager regarding his project management certification. The functional manager claims that the PMP certification claimed by the junior project manager is invalid and needs to be checked. What should be your response as a senior project manager?
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In a software development project, you are having joint application development (JAD) sessions to collect product requirements from stakeholders. Which of the following mandatory standards in the PMI Code of Ethics and Professional Conduct is met by having JAD sessions while gathering requirements?
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You have recently taken over a project from a PMP-certified project manager who was removed from the project due to incompetence and lack of skills. When you happen to meet him outside your building, he starts rebuking you for taking his project. He even goes so far as to suggest that your religion played a part in your selection by the management. What should you do first?
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