Massachusetts Plumbers Journeyman Practice Exam

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Prepare for the Massachusetts Plumbers Journeyman Exam with confidence. Engage with interactive quizzes and challenging questions designed to enhance your knowledge and understanding. Equip yourself before the big day!

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What is the definition of the lowest horizontal piping of a draining system that extends from the base of the main stack to a terminating point outside a building foundation?

Main Vent
Building Drain
Stack Vent
Backwater Valve

The correct answer is: Building Drain

The correct answer is Building Drain because it refers to the lowest horizontal piping of a draining system that runs from the base of the main stack to a point outside the building's foundation. The Building Drain is responsible for carrying waste water from the building to the sewer or septic system. The other options are: - Main Vent: The main vent is a vertical piping component that provides ventilation to the drainage system to prevent airlock. It is not the correct term for the lowest horizontal piping described in the question. - Stack Vent: The stack vent is a vent pipe associated with the main soil or waste stack. While important in plumbing systems, it does not specifically encompass the lowest horizontal piping that is being asked about in this question. - Backwater Valve: A backwater valve is a device that prevents sewage from backing up into the building. It is not directly related to the lowest horizontal piping of a draining system that extends outside the building foundation as described in the question.