New PMP Question & Answers with explanation

As part of a key project in a large organization, the manufacturing of valves is outsourced to a third party. The project manager learns that the valves will arrive earlier than expected and in greater quantities. What should the project manager do next?
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For a long-term infrastructure project, the project manager must acquire suppliers with the lowest possible risk due to the global business climate. What type of contract should the project manager use?
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A project manager requires laptops for the project team to start the project. The contracted vendor notifies the project manager that they will be two weeks late on delivery. The project manager selects a replacement vendor that immediately supplies the laptops. Now the original vendor receives their shipment and bills the project in accordance with their contract terms. What should the project manager do next?
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A project manager needs to outsource 1,200 resource hours. Due to internal policies, each provider must understand the requirements. What should the project manager do to ensure this?
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A supplier has been awarded a firm fixed price (FFP) contract to provide various materials for a construction project. The contractor has received all pertinent documents relating to material standards and specifications. By contract, the supplier must deliver all materials to the construction site on a specific date. When the materials arrive at the site on time, what should the project manager do?
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