Plumbing Exam 2 Questions With 100% Correct Answers | Updated 2026 | Graded A+

Plumbing Exam 2 Questions With 100% Correct Answers | Updated 2026 | Graded A+ Potable water - answer-_______ ______ is considered safe for human consumption and is often referred to as drinking water and domestic water. Ground - answer-_____ water (aquifer) is the natural water table below the surface and is the primary source of homes utilizing a well pump system water table - answer-A well is typically drilled or bored into the ground, so a pump can extract water from the _____ _____ purity - answer-The ______ of the water, regardless of the source, is typically inspected by local health administrations and regulated in each state or county. rural - answer-Development of ____ areas can change the quality of the ground water and slowly pollute a once clean source of water Safe Drinking Water Act - answer-The _____ ______ _______ ____ is a federal law regulating public water systems.It states that the EPA has the authority to dictate drinking water standards and can delegate its regulating authority to state or local agencies purification - answer-Removal of contaminants and the addition of chlorine, fluoride, or other necessary chemicals are achieved during a ________ process to disinfect the raw source of water. Nitrate, coliform - answer-______and ______ bacteria are two common threats for private water service system - answer-A _____ _____ ______ is the piping from a water meter or well to the building. Polyethylene, PVC - answer-_______ and _____ are two products allowable by code for a water service system, but they are not allowed to be installed in the building for water distribution systems. 60 - answer-Typically, the pressure switch on a well system is set to start the pump at 30 psi and turn off at __ psi. 80 - answer-Code dictates that a municipal or community water system must have a pressure-reducing valve if the incoming pressure exceeds __ psi. backflow - answer-If a water service is installed in the same trench as a drain or sewer, the possibility of _____ could occur. 5' - answer-Most codes dictate that a water service installed at the same elevation as a sewer must be separated from the sewer by at least ___ of undisturbed or compacted soil. higher - answer-To avoid excavating a separate trench, some codes allow the water service to be installed in the same trench, but it must be _____ than the sewer elevation. 1' - answer-The bottom of the water service must be at least ___ higher than the top of the sewer. perpendicular - answer-A water service that crosses a sewer trench at any angle is considered __________ sleeve - answer-To ensure that the water service pipe is protected against damage from possible excavation to access the sewer, most codes require the pipe crossing a sewer trench be installed in an oversized piece of pipe known as a _____.