CMP 124 Exam 3 Questions With Revised
Answers
What is purpose of Insulation - answerStop heat transfer, stop sound transmission
What are 3 methods of heat transfer - answerConduction, convection, radiation
how does heat move through conduction - answermovement of heat through a solid or liquid
...
Controlling sound transmission to other rooms - answer✔✔STC (sound transmission class)
Sound absorption depends on: - answer✔✔thickness of the porous material
size and number of pores
frequency of the sound
What does the sound transmission class do: - answer✔✔Deals with the design and use of
construction materials to control the noise transmission through walls, floors, ceilings, doors,
window openings
STC has a number rating... - answer✔✔higher the number the better
how to improve STC of light weight assemblies by... - answer✔✔adding fibrous insulation in
stud cavities
use multiple gypsum board layers
decoupling gypsum board layer
qualities of Gypsum board - answer✔✔natural ability to control heat
releases moisture
fire protection
sound control and noise reduction
hard/dense wall
Gypsum board strips (dimensions) - answer✔✔12" to 16" wide x 48"
Types of Drywall Board - answer✔✔Regular (living room, dining room)
Type X - fire rated (kitchen, garage)
Pre-decorated
Moisture resistant (MR) (Green Board) (Bathrooms)
Blue Board (absorbs some impact)
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