Tec 120 FINAL EXAM
Three types of rock are commonly quarried to produce building stone. Match the type of building stone to its rock source.
1. Granite 2. Limestone 3. Marble
According to material presented in class, the Eiffel Tower can expand and contract up to ______________ as a result of weather temperature extremes.
15 cm (about 6 inches)
The "Design Strength" of a concrete mix is typically measured at:
28 days
The typical thickness of a mortar joint is
3/8 inch
A structural steel shape with the designation W12 x 50 would weigh
50 lbs/linear foot
How many square feet of concrete poured to 4 inches depth will be covered by ONE cubic yard of concrete?
81 SF
The light transmittance of clear single-strength glass is approximately
85%
What is the overall height of an eleven (11) course concrete block (CMU) foundation wall?
88 inches
Which of the following is NOT a function of mortar
Allow movement between the courses of masonry
Building codes require residential occupancies to have an emergency escape/rescue window in each bedroom. What are the minimum dimensions of an emergency egress window?
At least 5.7 SF with a clear wide >= 20 inches and clear height >= 24 inches
Ice dams usually occur:
At the eave edge where the rafters or trusses meet the exterior wall.
The one distinguishing characteristic of a welded moment connection is:
Beam web and flanges are attached with full-depth welds
Beginning in the mid-1850s, the ______________ process was introduced, which lead to the production of plentiful and inexpensive steel for the first time
Bessemer
Where is "safing" inserted in curtain wall systems?
Between a curtain wall panel and the edge of the floor slab
One of the challenges of masonry cavity wall construction is that clay brick and concrete block behave differently in thermal expansion and contraction. Which of the following is TRUE of brick and block movement?
Brick expands and block shrinks
What type of slab finish is required for a sidewalk?
Broom finish
Which of the following is NOT an accepted method for securing a single-ply roof membrane to the roof deck:
Built up applications of coal tar
The ASTM E108 is used to test and classify the fire resistance of roofing systems. The roof coverings most effective against severe fire exposure are:
Class A
The test specimen used for determining the compressive strength of concrete in the United States is a
Cylinder measuring 6 in. diameter × 12 in. high
What admixture is used to reduce potential damage to the concrete from exposure to repeated freezing and thawing cycles?
Entrained Air
EIFS is an acronym for:
Exterior Insulation and Finish System
A gable roof is built using a combination of opposing common rafters and hip rafters attached to a ridge board.
False
A slip-forming system would most likely be used for molding concrete into an unusual shape with a highly customized surface.
False
Everything else being the same, a concrete with a larger coarse aggregate requires less Portland cement and water paste to give the same concrete strength
False
Fire-protection of structural steel framing member is mandated by building codes for all buildings
False
Polymer-based EIFS are thicker and more resistant to punctures and dents than polymer-modified portland cement EIFS
False
Precast slabs must always be topped with site-cast concrete
False
Solar reflectance (or albedo) is measured on a scale from 0 to 1, where 1 represents a material that reflects ALL solar radiation and 0 represents a material that absorbs ALL solar radiation. Therefore, "cool roofs" are associated with lower reflectance values
False
Walers are vertical supports for modular or site-built forms
False
Dissimilar metals should not be used in a roof primarily because:
Galvanic corrosion is likely to result
The term GFRC is an acronym for:
Glass fiber-reinforced concrete
A shelf angle in a brick veneer assembly must provide:
Gravity load support to the veneer
Structural steel shapes, such as W, C, and L, are made by:
Hot rolling of steel blooms
What is the ingredient in mortar that makes it workable? i.e. the mortar will stick to the trowel to allow bricks/blocks to be buttered.
Hydrated Lime
The chemical process by which concrete and mortar harden is called
Hydration
What causes honeycombing in finished concrete?
Improper consolidation
The stirrups in a reinforced concrete beam are used to
Increase the strength of the beam in shear
Green roofs or vegetated roofs have many benefits to the environment. Which of the following is NOT an advantage of green roofs:
Increased heating and cooling costs to keep the plants roots at a near constant temperature
Which of the following does not represent a open web steel joist series?
J-series
Which is the most expensive element of site-cast concrete construction?
Labor and materials for the form work
Which of the following is NOT an advantage of low-slope roofs?
Less prone to standing water and progressive collapse from snow loads.
Which of the following is NOT an advantage of a built-up roofing system
Lower labor and material installation costs
A stick system glass curtain wall is anchored to the buildings structure through:
Mullions (vertical)
A stick system glass curtain wall is comprised of:
Mullions, spandrel materials, and glass
Which of the following is the correct term for the region of an exterior wall that projects above the level of the roof. The purpose of the projecting wall may be architectural or to screen rooftop mechanical equipment and limit the spread of fire.
Parapet
Epoxy-coated bars are generally used in:
Parking garages built in cold climates
The most important reason for using column ties in a concrete column is to
Prevent the buckling of longitudinal column bars
A fire-resistant material inserted into a space between a curtain wall and a spandrel beam or column to retard the passage of fire through the space is called
Safing
Which of the following is the correct term for an opening in an exterior wall or parapet through which water can drain off of a flat roof.
Scupper
Steel structures can gain lateral stability by connecting them to a rigid core, such as reinforced concrete elevator shafts or utility cores. The walls that comprise the ridge core are typically referred to as:
Shear walls
A fully adhered EPDM membrane would most likely be used for a
Single ply low-slope roof with or without ballast
What type of slab finish is required for a factory floor?
Steel trowel finish
What admixture can be used to improve the placing of concrete in forms or slabs with extensive reinforcement steel?
Superplasticizer or high-range water reducer
How is the slope created for a low slope roof?
Tapered roof insulation and Roofing bar joists or trusses can be designed and installed.
Reinforcing steel is added to structural concrete members to increase the
Tensile Strength
A one-way concrete joist system can be thought of as a very thick one-way slab with the concrete between the joists left out because:
This additional concrete form a full depth slab that isn't doing much structurally work anyway
What is the name of the concrete delivery method when concrete ingredients are mix in the truck on the way to the construction site?
Transit-mix
A properly installed polymer-based EIFS system is comprised of extruded polystyrene foam insulation, metal or plastic reinforced mesh, and a relatively thin synthetic stucco finish coat.
True
A shear connection between a steel beam and a steel column can be made without connecting beam flange to the column.
True
A typical glass curtain wall is provided with weep holes to drain infiltrating water even though it is sealed from both the inside and the outside with gaskets or tapes:
True
Ceiling joists and collar ties are securely face-nailed to the rafters to resist the outward thrust of the roof structure.
True
Concrete columns may be cast in round paper tubes
True
In northern climates, a vapor retarder should be installed between the conditioned space (heated or cooled) and the roof or wall insulation
True
It is good practice to terminate the flashing over a shelf angle just beyond the face of the mortar joint
True
Light-gauge steel sheet can be "cold-worked" to produce C-shaped sections (studs) for interior partitions and exterior wall construction
True
Manufacturers specify a minimum slope for each type of roofing covering material
True
Mortar bed joint can be varied in thickness to align with architectural features such as the top of doors or windows
True
No mortar is "best," however it is essential to select the correct mortar for the application. The designation utilized to categorize mortar strength originated from selecting every second letter of "MaSoN wOrK." Therefore, Type M mortar is the strongest
True
Precast beams camber up from the casting bed as soon as the pretensioning force is released in the tendons
True
Precast hollow-core slabs may be produced by direct extrusion or by using inflatable tubes to form the voids
True
Steam curing of precast concrete elements develops the full strength of the concrete many times faster than curing at ambient temperature
True
The CSI MasterFormat categorizes masonry work in Division 04000
True
The center portions of form ties remain permanently embedded in a concrete wall
True
The primary purpose of longitudinal steel bars in a reinforced concrete beam is to overcome the weakness of concrete in tension
True
How may horizontal steel reinforcement be provided in a CMU wall?
Truss or ladder horizontal joint reinforcement can be embedded in the mortar joint
ASTM specifications classify Portland cement in five basic types, referred to as:
Types I, II, III, IV, and V
Which of the following is the BEST example of a working joint that allows for expansion and contraction of roofing materials?
Typical 3-tab or architectural strip fiberglass or asphalt shingle
When we determine the strength of concrete using the test specimens, we determine the concrete's
Ultimate compressive strength
In structural steel, camber refers to:
Upward deflection of a beam to counter downward deflection by a dead load
What is the name of the system in which concrete slab and wide-flange steel members work together as a single structural unit?
composite construction
Segregation of the aggregate and cement paste in a concrete mix occurs when:
concrete is not placed properly
What is the name of the white powdery deposit that sometimes appears on the face of a masonry structure caused by the leaching of chemical salts by water migrating from within the structure to the surface?
efflorescence
One of the earliest methods of fireproofing structural steel members was to:
encase the steel in concrete
The most common type of shingle used for light-frame roofing is:
fiberglass or asphalt shingles
What is the purpose of spraying a curing compound on a freshly-finished concrete slab?
forms a coating on the surface of a freshly-finished concrete slab that retains the moisture in the slab to promote full hydration of the concrete
Tempered glass is NOT required for which of the following uses:
glass in swinging or hinged windows
Which of the following is NOT a standard component of a masonry cavity wall?
lintel
What type of concrete masonry unit (CMU) would be used to create a bond beam?
lintel unit
A type of structural steel connection designed to stabilize a frame against lateral forces such as those generated by earthquakes is a:
moment connection
In site-cast concrete, column reinforcing steel are offset at the top to:
overlap the reinforcing steel for the column in the next story.
Aggregate for concrete is generally subdivided into coarse aggregate and fine aggregate. The distinction between the two types of aggregate is based on:
particle size
Which of the following finishes is NOT suitable for aluminum cladding components:
polyurethane varnish
What type of concrete framing systems may be favored where rapid erection, reduced dead weight, all-weather construction capability, quality control of concrete, superior surface quality, or slenderness of structure are important considerations?
precast
One approach to making buildings watertight is to create "barrier walls." Which of the following is NOT a concern of the barrier wall design?
rainscreens mitigate drainage and drying concerns
Ganged forms are used for:
repetitive placement of large wall sections
The major advantage of air-entrained concrete is:
resistance to freeze-thaw cycle damage
According to the textbook, which of the following BEST describes a low-slope roof:
slope < 2:12
As the carbon content of steel decreases from 3% in cast iron to 0.3% in mild structural steel, the metal becomes:
softer and more flexible
What framing materials provide a suitable back-up wall for brick veneer cladding in a non-combustible building?
steel studs with water-resistant gypsum sheathing
Portland cement sets and gains strength because of a chemical reaction with
water
