2. ___ water is suitable for drinking, culinary, and hygienic purposes.

3. A water meter is a mechanical device used to measure water ___.

4. A ___ engineering innovation is the large-scale inverted siphon, which enabled aqueducts to cross valleys without the use of arched structures.

5. The aqueduct system in ___ is the longest in the world.

6. ___ was the first major city to have a centralized and piped water delivery system.

7. A(n) ___ is a pipe connection in which the plain end of one pipe is inserted into the enlarged-diameter end of another pipe.

8. In 1850, Dr. John Snow discovered that the cause of the London cholera epidemic was ___.

9. The ___ could clarify turbid raw water with no pre-sedimentation and was less expensive to use than the slow sand filter.

10. ___ pipe is a piping material that contains organic, polymeric substances, is solid in its finished state, and can be shaped by flow.

1. ___ develops voluntary standards that enhance public safety, health, and quality of life as well as facilitate innovation, trade, and competitiveness.

2. The ___ publishes the 2021 Uniform Plumbing Code (UPC).

3. The Reduction of Lead in Drinking Water Act (RLDWA) redefined the maximum limit of the amount of lead in the component that is in contact with potable water (wetted surface) to the weighted average of ___%.

4. The color used to identify drawn copper tube is ___ for Type K.

5. Pipe 1" and larger should be supported horizontally every ___'.

6. A(n) ___ is used to provide an area for tubing to expand and contract without stressing pipe or fittings.

7. Schedule 40 PVC pipe and fittings are ___.

8. Two-step solvent cement is ___ in color.

9. PE-AL-PE pipe 1/2" (13 mm) to 1" (25 mm) should have horizontal above-ground supports at ___" intervals.

10. The silane method of manufacturing PEX tubing involves grafting a reactive silane molecule to the backbone of the polyethylene molecule and is referred to as the ___ process.

11. A ___ is a coupling that connects two different types of pipe or tube, such as ductile-iron pipe to PVC pipe.

12. A(n) ___ is a device used to regulate fluid (liquid or gas) flow within a system.

13. A ___-wedge disc gate valve is a gate valve that contains two halves of a split disc that are separated by a spud.

14. A ___ valve is used to control fluid flow and consists of a rotating disc that seats against a resilient material within the valve body.

15. A ___ check valve is a check valve in which backflow is prevented through the use of a disc that moves vertically within the valve body.

16. Most codes require that a pressure reducing valve be installed if the supplied static water pressure is at or above ___ psi.

17. The purpose of an automatic compensating mixing valve is to prevent ___ due to the reduction of cold water pressure or lowered temperature at the fixture fitting.

18. A ___ is a plastic pipe hanger with an integral lug that assists in retaining the pipe in the hanger.

19. In concrete or masonry construction, ___ provide an attachment point for pipe hangers and supports.

20. In areas where compaction is required, there must be at least ___' above the pipe before compaction with mechanical means.

1. ___ is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

2. A ___ is a considerable inland body of standing water.

3. Reclaimed water is most commonly used as ___ water.

4. ___ water is wastewater from fixtures that comes in contact with or contains fecal matter or food solids.

5. ___ storm water harvesting uses earthworks, land shaping, or other earth-related techniques and structures to direct, concentrate, and infiltrate storm water into the soil for beneficial uses such as plant uptake and groundwater recharge.

6. A ___ water system is a public water system that provides water for at least 25 people per day and only uses water occasionally and for short periods of time.

7. A ___ well is a well that is made by excavating a circular hole several feet in diameter to a rather shallow depth.

8. Building sewers and private sewage disposal systems should be kept at least ___' from water wells.

9. A ___ is an atom with an unstable nucleus, which emits energy in the form of rays or high-speed particles to become more stable.

10. A(n) ___ is a measurement of weight equal to 0.002285 oz (0.064779 g).

11. ___ is a mechanical water treatment process that removes particulate matter by separating water from solid material by passing it through a filter such as sand.

12. Two benefits of ___ are that no chemicals are used and it has no harmful effect on the water.

13. The storage size of a basin or reservoir should be based on the maximum consumption expected during an average storage time of ___ hours.

14. ___ are individual or groups of atoms that carry an electrical charge.

15. A(n) ___ is provided on water softener piping so that maintenance can be performed on the water softener without interrupting the water supply to the remainder of the residence.

16. Consumer confidence reports (CCRs) are required to be sent by ___ every year.