Chapter 11

The DWV system is _____.

• the public sewer and treatment center

• a system of piping used to remove waste from a building's fixtures and drains

• a system of piping used to deliver potable water into a building

• the building drain and sewer

Most jurisdictions do not allow irrigation of edible plants using _____.

• stream water

• brownwater

• graywater

• ground water

A basket strainer is an example of a _____.

• trap

• fixture drain

• catch basin

• cleanout

A trap should provide a liquid seal of 2 to _____.

• 5 inches

• 3 inches

• 4 inches

• 6 inches

To function properly, fixture traps must flush completely, be self-cleaning, have a smooth interior waterway, and be _____.

• easily removable

• made from copper or brass

• interchangeable with other fixtures

• accessible for cleanout

Built-in traps are included in _____.

• sinks

• lavatories

• bathtubs

• water closets

Grease interceptors are commonly installed in _____.

• beauty salons

• restaurants

• pet grooming shops

• factories

The point where wastewater leaves the trap and enters the drainage piping is called the _____.

• top dip

• bottom dip

• crown weir

• trap arm

A trap is likely to siphon if the horizontal leg is installed with a drop greater than _____.

• 1/2 inch per foot

• 1/4 inch per foot

• 3/4 inch per foot

• 1 inch per foot

For a trap to operate properly, the crown weir must be installed _____.

• higher than the top of where the fixture drain enters the vent line

• lower than the bottom of where the fixture drain enters the vent line

• higher than the bottom of where the fixture drain enters the vent line

• lower than the top of where the fixture drain enters the vent line