BOMI Desin & Oper Ch. 3 Flashcards
Chapter 3
Degree of heat transfer depends on 2 factors
Temperature and heat flow. Temperature is the amount of thermal energy available, and heat flow is the movement of thermal energy from place to place (outside in)
Conduction
Mechanism of heat transfer in opaque, solid media, such as walls and roofs (warm temperature of coffee felt through a mug)
Radiation
Heat felt from an asphalt roof on a hot day. Form of heat transfer that occurs between two separated bodies as a result of electromagnetic radiation.
Cement
Burned mixture of clay and limestone pulverized and mixed with water and aggregate. Prime ingredient in creation of mortar, grout and concrete.
Steel
Excellent heat conductor and a poor heat insulator. Excellent sound reflector. Cast in concrete to protect steel during a fire.
Copper
Copper & its alloys of brasses (copper & zinc) & bronzes (copper & tin) are used in various ways in construction. Excellent outdoor metal because of its corrosion resistance.
Aluminimum
Soft, nonmagnetic, & corrosion-resistant silvery metal, has a low melting point, high thermal & electrical conductivity, & light weight. Not an effective sound absorber & isn’t used in wall, floor, or ceiling applications as a sound reflector.
Lead
Soft, malleable metal that h as a number of applications in construction. Pliable & poor conductor of electricity w/great resistance to corrosion. Not a radiation hazard & is an excellent radiation shield.
Plaster
Mixture of portland cement, lime, gypsum, and other material, such as wood fiber. Similar to mortar or cement.
Stucco
Type of plaster made with portland cement and applied to exterior surfaces to form a finish coating. Finish treatments can be given to produce desired textures.
Wood
Free from rust and corrosion, lightweight and adaptable to a variety of uses. Steel framing is replacing wood in commercial buildings. More dense woods are better sound reflectors, and less dense woods are better sound absorbers.
Wood Seasoning
Process of drying lumber to make it ready for use.
Green Lumber
Unseasoned lumber.
1) On the first cold day of the year, Ron turns on the electric heat in his building. As the fans begin to blow warm air into t he offices, heat is transferred through a process called: a-conduction; b-convection; c-radiation; d-emission
b-convection
2) Mary is overseeing the retrofit of an older building. She recommends the use of _____ insulation, because the shape and location of certain interior walls are a challenge to insulate. a-blanket; b-corrugated; c-sprayed-on; d-reflective
c-sprayed-on
3) Mark makes sure that the ______ used in his building is constructed w/steel reinforcement bars. This is because, though it has great compressive strength, it has little tensile strength. a-brick; b-concrete; c-cement; d-stone
b-concrete
Tensile strength
Ability to w/stand being pulled apart.
4) Emily is helping to design a building that will be located in a part of the country prone to earthquakes. Which type of mortar, known for its compression and tensile strength, is she likely to recommend using. a-Type M; b-Type O; c-Type N; d-Type S
d-Type S
Type M Mortar
High-Compression Strength; highest proportion of portland cement, & is recommended for walls bearing heavy loads, foundations, retaining walls, sidewalks, & driveways
Type S Mortar
Compression and Tensile Strength; Yields maximum flexural strength to fight wind, soil pressure, or earthquakes.
Type N Mortar
For exterior, above-grade walls; Recommended for most exterior, above-grade walls exposed to severe weather, including chimneys
Type O Mortar
For interior or non-loadbearing Use; recommended for interior and limited exterior use in non-loadbearing walls
5) David disagrees w/his colleague’s suggestion to incorporate ______ in the ornamental ceiling applications to be installed in his building, because this metal is not an effective sound absorber. a-aluminum; b-lead; c-copper; d-bronze
a-aluminum
6) Knowing stainless steel’s susceptibility to galvanic action, Kristina decides against adding ornamentation that is comprised of steel and ______ to the outside of her building. a-magnesium; b-zinc; c-copper; d-aluminium
c-copper
7) One reason Michael uses gypsum wallboard (drywall) is that it is ______. a-fire-resistant; b-easily formed into curves and shapes; c-only applied to exterior surfaces; d-water-resistant
a-fire-resistant
Gypsum
Soft, hydrous calcium sulfate. Fire resistant due to a slow release of water from crystallization contained in gypsum
8) Ashley is eager to complete a spatter dash finish treatment to the ______ walls in her building. a-plaster; b-brick; c-stucco; d-slate
c-stucco
9) In accordance w/NIST, ______ refers to a system that identifies the placement of wood defects and possible strength of the lumber. a-wood seasoning; b-wood grading; c-wood coating; d-wood pressure
b-wood grading
10) Although knots won’t reduce the usefulness of wood, holes and cracks are defects that might impact wood’s ______. a-fire-resistance; b-sound reflectance; c-strength; d-color
c-strength
