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Exam 13: Stacks

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Question 1

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

A) True
B) False

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Question 2

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

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Question 3

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

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

_______________ 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.

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

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

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

PVC stacks do not require support at their base.

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

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

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

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

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

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

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

Cast iron stacks do not require support at their base.