Deck 13: Stacks

Question 1

Always get instruction and/or permission before drilling into pre-cast concrete walls.

Answer 1

True

Question 2

PVC stacks do not require support at their base.

Answer 2

False

Question 3

In a properly designed venting system, the pressure variation at any trap outlet should be + or - __________ inch water column.

Answer 3

1
one

Question 4

_______________ stacks are special stacks that do not receive any liquid or solid wastes; they convey air so that the pressures within the DWV system remain equalized.

Question 5

Terminal velocity is a measure of how fast water will discharge from the fixture.

Question 6

The more branch intervals on a stack, the higher the DFU rating for each size pipe.

Question 7

A stack is a vertical waste, soil, vent, or storm pipe that extends either through the _______________ or for at least _______________ stories.

Question 8

Holes for pipe penetrations in wood floors should be as tight as possible to support the pipe.

Question 9

Stacks made of plastic pipe must be supported every 4 feet.

Question 10

Vent stacks should never be less than one-half the size of the drain they serve.

Question 11

Some codes require at least one stack to extend ____________________ from the base through the roof.

Question 12

A joist may not be notched in the middle _______________ of the span.

Question 13

Cast iron stacks do not require support at their base.

Question 14

Stacks should be supported at every ____________________ except for threaded pipe, which should be supported at ____________________ ____________________ ____________________.

Question 15

A ____________________ ____________________ is the distance along a stack corresponding to one story in height.

Question 16

The space between a pipe sleeve and a pipe should be left open to allow for better ventilation.

Question 17

At rated full load, a stack is about ____________________ full.