Construction exam 2

In the light gauge designation "250U050-54":

U designates this as a channel

You would be most likely to find leveling nuts near which item?

a column base plate

What supports the overhanging bricks in the accompanying image?

a hidden lintel (like a steel angle)

Reshoring is:

a set of supports for lower floors while upper floors get poured.

The waffle slab is:

the two-way concrete joist framing system.

Which statement is correct? Cavity masonry walls are beneficial because:

their two wythes of brick masonry provide added insulation

Which of these is true (select all that apply) (in cold weather, fresh mortar water must not freeze; in hot weather, fresh mortar must not dry out; in hot weather, masonry may have to be wetted before laying)

(all)

Which of the following is not a common material used in a lintel in a CMU wall?

2x6 dimensional lumber

What is the actual size of the face of the 6" CMU block sown in the accompanying image?

7-5/8" x 15-5/8"

The highest hydraulic pressure on vertical formwork occurs

at the bottom of a wall

Dry-stacked masonry is bonded together:

By adding structural cement plaster to it's surfaces

Which block would you use when constructing a vertical control joint in a wall? (top row from left to right: A, B, C. Bottom row from left to right: D, E.)

C

Exterior sheathing for noncombustible light gauge steel walls is typically:

gypsum board

Which of the following is not a decorative CMU?

Channel bond-beam block

w]Which of these is a true statement?

Concrete left in air after 7 days will have approximately 90 percent of its full strength at 28 days.

Which of these masonry insulating techniques affects the exterior appearance of the wall? (hollow-core insulation; internal CMU polystyrene insulation; EIFS; wall cavity insulation; interior insulation)

EIFS

Leads are constructed in brick and block wall construction to accomplish all of the following except:

accommodate lintel installation at openings in the wall

Posttensioning a concrete element (e.g., a beam, girder, or slab) helps the concrete element to:

achieve a longer span than would otherwise be possible

The amount of Portland cement in concrete can be reduced by(select all that apply): (adding blast-furnace slag; adding silica fume; adding fly ash)

adding blast-furnace slag; adding silica fume; adding fly ash

Light gauge steel buildings must be stiffened by (select all that apply) (adding stiffeners at ends of joists; none of these are necessary; diagonally bracing walls; bracing studs at 4' intervals)

adding stiffeners at end of joists; diagonally bracing walls; bracing studs at 4' intervals

Concrete slab shrinkage cracks are primarily reduced by:

adding wire-mesh rebar

Which of the following is not acceptable means of making a steel column fire resistant?

all of the options are acceptable means of making steel column fire resistant

A member on a steel drawing is identified as L5 x 4 x 3/8. This member is:

an angle

A composite masonry wall is so named because it features:

an outer wythe of stone or brick and a backup wythe of CMUs

Flashings used in masonry cavity wall construction can be made of each of the following except:

ashlar

Which of the following terms is not associated with achieving longer spans in steel? (plate girder; rigid frame members; backup bar; castellated beam; joist girder)

backup bar

On a drawing, a building element is referred to as "W10 x 33". This element could be a:

beam

Shear studs are often welded to the top of a steel beam (see the accompanying sketch). These studs serve to:

bond the beam to the concrete and cause the beam and concrete to act as a single structural unit.

Concrete is sometimes pretensioned. This is usually performed offsite, at the manufacturer s plant. Which of the following elements is the least likely to be pretensioned?

cast-in-place elevated slab parking garage

The steel used for light gauge steel framing differs from the steel discussed in Chapter 11 ("Steel Frame Construction") in that light gauge steel is:

cold-rolled

Which of these can provide two-way structural action (select all that apply)? (concrete slab; cross-laminated timber; concrete beam)

concrete slab; cross-laminated timber

Steel production does not include:

continuous casting of molten steel into W-shapes

The tooled joint lines that you can see on a typical concrete sidewalk are:

control joints

Quoins are associated with

corners of masonry walls

Which of the following is not affected by the addition of water to a concrete mix? (the ease of placing the concrete by the masons and laborers; the concrete's future strength; the concrete's slump; cost of the concrete to the customer; the concrete's propensity to develop shrinkage cracks)

cost of the concrete to the customer

Higher brick kiln temperature leads to___ bricks

darker

Admixtures are used in concrete to:

delay hardening

Which of the following has the principal function of providing lateral stability to a steel frame?

diagonal bracing

Segregation will likely occur during concrete placement if the concrete is:

dropped from a substantial height

Which brick manufacturing process produces a molded brick?

dry press

After two precast concrete elements are joined, the exposed metal connectors (e.g., bolts, nuts, shim plates, etc.) that are not covered by a slab topping are usually:

dry-packed with portland cement grout

Which of the mortar joint profiles shown in the accompanying sketch is appropriate to use in outdoor walls that will be exposed to freeze/thaw conditions?

e

Which of these steel framing features provides earthquake safety?

eccentrically braced frames

Slip forming would be most beneficial when constructing:

elevator shafts or storage silos

The terms vitrification, oxidation, water smoking, and flashing are all associated with:

firing bricks in a kiln

If you see a jet burner or a diamond wire cutting stone at a quarry, which stone is most likely being cut?

granite

The low lift method and the high lift method are different procedures for

grouting reinforced brick walls

Reinforcing steel and concrete are very compatible. Which of the following is untrue? (individually, each has a very high allowable tensile strength; concrete bonds well to reinforcing steel; the two have similar coefficients of thermal expansion; they are chemically compatible - steel is protected from corrosion by the alkaline chemistry of concrete)

individually, each has a very high allowable tensile strength

Trussed joint reinforcement:

is laid into the mortar bed

Structural steel:

is largely made from scrap automobiles

"Ordinary" construction:

is very similar to balloon framing

Lime is added to modern masonry mortars because:

it improves workability

You would be least likely to see a mason's apprentice (beginner) performing which of the following?

laying a lead (installing bricks in a building's corner)

Which of these is an incorrect statement? (limestone is lighter than granite; granite and marble show low water absorption; granite is less susceptible to freeze-thaw damage than limestone; granite has a higher bending strength than marble; limestone has a higher compressive strength than granite)

limestone has a higher compressive strength than granite

Over time, concrete deforms because of(select all that apply): (loads placed on it; creep deformation; drying shrinkage)

loads placed on it; creep deformation; drying, shrinkage

Brick walls can be reinforced by:

low-lift grouting

Which pair are the major metamorphic stones used in building construction?

marble and slate

When insulating light gauge steel walls, care must be taken to:

minimize thermal bridging

The accompanying sketch depicts which type of connection?

moment

In a CMU load bearing wall, the weakest component is the:

mortar

Which term does not belong with the others? (isolation joint; control joint; mortar joint; expansion joint)

mortar joint

Welded connections:

none of the options listed

The accompanying sketch depicts a:

one-way concrete joist system

The accompanying drawing shows a:

one-way solid slab system

Compostie steel decking reinforces the concrete slab in which direction?

perpendicular to beams and girders

Insulating concrete form (ICFs):

place the insulation at the core of the concrete wall

Which of the following is not associated with finishing a concrete slab on grade? (post tensioning tendons; floating; strike-off; troweling)

posttensioning tendons

Stirrups are:

pre-bent shear rebars

What is the stone pattern shown in this image called?

random rubble

In reinforced CMU walls:

rebar can be placed horizontally and vertically

Open-webbed steel joists are usually used in a commercial steel-framed building to support:

roof decks

Which of the following structural bonding patterns for bricks features a single wythe? (english bond; flemish bond, running bond, james bond, common bond)

running bond

Brownstone, bluestone, travertine, and limestone are

sedimentary rock

Which of these statements is false? (water absorption is important for paving brick; frogs permit a brick to cure more evenly; solid brick must not contain any holes; hollow bricks are used for adding reinforcement; firebricks are made from special clays)

solid brick must not contain any holes

Weathering and stainless steels are examples of:

steel alloys

Which of these is not an example of a cold-formed steel product? (light gauge C-channel; steel deck; concrete prestressing strands; steel angle; steel tubing)

steel angle

Which of the following is primarily responsible for preparing structural steel shop drawings, which show details of connections, exact spacing of bolt holes, anchor bolt sizes and locations, and so on, and for the site steel components that are ready to be assembled without further processing?

steel fabricator

Which word does not belong with the others? (stile, rowlock, stretcher, header, soldier)

stile

Which of these is not true for columns? (stirrups are added for shear reinforcement; column ties are usually cheaper than spiral rebar; spiral rebar is better for earthquake resistance; ties are added to prevent buckling of rebars; columns contain longitudinal rebars)

stirrups are added for shear reinforcement

In slab placement, what comes directly before concrete floating?

strike-off

Chairs and bolsters are used to

support reinforcing bars in beams and slabs, prior to concrete placement

The most important aspect of a high-strength bolt connection is:

tensioning the bolts

You studied many brick structural bonds. Some of these, like Flemish bond, common bond, and English bond, involve double wythes. But these structural bonds are not used much in new construction today because:

these are load-bearing bonds, but most brick used on buildings today is not load-bearing

Which is a false statement regarding hollow-core slabs?

they are two-way structural elements

The advantages of using light gauge steel framing members in lieu of wood framing members include all of the following except:

they provide better thermal insulation that do wood members of the same size

Fly ash, accelerators, superplasticizers, and air entrainment are added to a concrete mix to

to alter its properties in different ways

The process of raking and cutting out defective mortar and replacing it with fresh mortar is called:

tuck pointing

Which of these concrete systems typically has the smallest construction height (floors and beams)

two-way flat plate

You need to speed up concrete construction. Which cement type gives you the required strength the fastest?

type III

Which mortar type would you use for historic restoration work?

type O

Reducing embodied energy for bricks requires:

using fly-ash and steam curing

Water permeability of paving can be improved by (select all that apply) (using permeable pavers; spacing conventional paving units and filling gaps with sand; laying pavers in a herringbone pattern)

using permeable pavers, spacing conventional paving units and filling in gaps with sand

The effect of posttensioning a concrete masonry wall is to put the wall in

vertical compression

Self-consolidating concrete does not need:

vibrating

Concrete must be compacted in the forms to eliminate trapped air and to fill completely around the reinforcing steel and into all the corners of the formwork. What tool is used to accomplish this?

vibrator

Shear panels or shear walls are sometimes used in steel framed buildings. Which Component of wood light frame construction serves the same function as shear panel/wall

wall sheathing

Which of these is not part of a masonry cavity wall's drainage system?

wall tie

Form ties are associated with which concrete element?

walls

Efflorescence that appears on the surface of a wall of brick, stone, or concrete masonry can be caused by:

water-soluble salts present in the mortar, brick, stone or CMU

Which of the following is most closely associated with reinforcing steel? (welded wire fabric; Portland cement; concrete admixtures; concrete's slump; non-shrink grout)

welded wire fabric