Deck 22: Air Distribution and Balance

Question 1

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

Answer 1

False

Question 2

Static pressure plus velocity pressure equals total pressure

Answer 2

True

Question 3

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

Answer 3

plenum, extended plenum, reducing extended plenum, perimeter loop system

Question 4

Fresh air enters the structure by ____________________.

Question 5

____________________ in the duct slows the air flowing in it

Question 6

Motor drives can be _________________________ or _________________________ assemblies

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

Forced air systems use different air every cycle

Question 12

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

Question 13

The friction chart is used to properly size duct systems

Question 14

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

Question 15

Different spaces require the same air quantities