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Exam 22: Air Distribution and Balance

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Question 1

True/False

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Branch ducts deliver the proper amount of air to remote locations in the structures

A) True
B) False

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Question 2

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The friction chart is used to properly size duct systems

A) True
B) False

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True

Question 3

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Pressure in the ductwork is measured in inches of water column (in. W.C)

Forced air systems deliver the correct quantity of conditioned air to the occupied space

Static pressure plus velocity pressure equals total pressure

Different spaces require the same air quantities

The supply duct system can be configured as a ____________________, ___________________________________, ___________________________________ or ___________________________________ system

Air pressure in cfm can be calculated by multiplying the air velocity by the cross-sectional area of the duct in square feet

Typically, 400 cfm of air must be moved per minute per ton of air conditioning

Duct systems can be made of galvanized metal, aluminum, fiberglass duct board, spiral metal, flexible duct or a combination of different materials

Forced air systems are made up of the _________________________, _________________________ system, _________________________ system and supply registers or grilles

Motor drives can be _________________________ or _________________________ assemblies

Fresh air enters the structure by ____________________.

Forced air systems use different air every cycle

____________________ in the duct slows the air flowing in it