Red Seal Plumbing Practice Exam

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What must a gear pump be installed with due to its nature as a positive displacement pump?

  1. Vacuum breaker

  2. Pressure relief valve

  3. Foot valve

  4. Check valve

The correct answer is: Pressure relief valve

A gear pump is a type of positive displacement pump, which means that it pumps a fixed amount of fluid with each rotation of its gears. Unlike centrifugal pumps, gear pumps require a backpressure in order to operate effectively. This means that they need to have something in place to control or regulate pressure levels in the system. Of the given choices, options A, C, and D are incorrect because they are not related to controlling or regulating pressure levels. A vacuum breaker is a safety device that prevents unwanted backflow of fluids, which is not necessary for a gear pump. A foot valve is a type of check valve used in pumping systems, but it is used to maintain water levels in a well and is not directly related to controlling pressure. A check valve is also not directly related to controlling pressure, as it is used to prevent backflow in a single direction. Therefore, the correct answer

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