Drainage Chapter 4 Review

A(n) ___ is a device that retains a quantity of liquid each time a plumbing fixture is used, thus producing a measured volume of liquid.

• water seal trap

• Trap seal

• Water vent

• Integral trap

 

The maximum length of an indirect waste pipe is 5' (1.5 m).

• False

• True

 A(n) ___ is the external water seal trap that is approved by all plumbing codes.

• Bell trap

• Drum trap

• P-trap

• S-trap

The outlet of a trap directs wastewater flow into the dip of the trap.

• False

• True

• Maybe

The maximum trap arm length is different for each size of pipe and differs among codes

• True

• Maybe

• False

The ____________________ is the lower part of the 90° radius bend and is also the top of the trap seal.

Pressure pushing against the outlet of the trap from inside the drainage system is called ___.

• siphonage

• trap seal

• backpressure

• aspiration

The 24" (610 mm) minimum standpipe is the height required to eliminate the possibility of pumped waste ____________________ the standpipe.

A lavatory is prone to self-siphonage to a greater degree than any other fixture.

• True

• False

A ___ is a device or system with a feeder line that releases a small amount of water to a trap when it runs dry to maintain the trap seal.

• capillary

• trap primer

• crown vented trap

• bottle trap