Plumbing Knowledge Quiz

What is the primary purpose of the P-trap?

• To prevent backflow of sewer gases.

• To regulate water pressure.

• To filter water before it enters the drain.

• To increase water flow velocity.

What is the minimum size of a DWV vent pipe for a residential kitchen sink?

• 1 ½"

• 2"

• 3"

• 4"

Which of the following is NOT a common type of pipe used in plumbing?

• Copper

• PVC

• Cast Iron

• Aluminum

What is the primary function of a water meter?

• To control water pressure.

• To measure water consumption.

• To filter impurities from water.

• To regulate water temperature.

What is the purpose of a water heater?

• To filter water.

• To increase water pressure.

• To heat water for domestic use.

• To regulate water flow.

What is the primary function of a water softener?

• To remove chlorine from water.

• To remove sediment from water.

• To remove hardness minerals from water.

• To increase water pressure.

What is the purpose of a vent stack?

• To prevent siphoning of water from traps.

• To increase water pressure.

• To filter water before it enters the drain.

• To regulate water temperature.

What is the minimum size of a water service line for a single-family residence?

• ½"

• ¾"

• 1"

• 1 ½"

What is the purpose of a backflow preventer?

• To prevent the flow of water from the building to the water main.

• To prevent the flow of contamination(material other than water) into the water supply.

• To increase water pressure.

• To regulate water temperature.

What is the purpose of a pressure reducing valve?

• To increase water pressure.

• To decrease water pressure.

• To filter water.

• To regulate water temperature.