Nevada C-4F Sheet Metal Studs Contractor Examination

Under NAC 624.220, what work does a Nevada C-4F Sheet Metal Studs license authorize?

• AErection and installation of sheet-metal studs for ceiling framing and nonstructural part…
• BInstallation of wood studs and structural steel beams
• CWelding of structural wide-flange columns
• DTaping and finishing of gypsum wallboard only

Which framing material is expressly outside the Nevada C-4F subclassification?

• A25-gauge drywall studs
• BCold-formed steel ceiling furring channels
• CWood studs or structural steel used for framing
• DNonstructural 3-5/8-inch steel studs

Under IBC 2018 Section 2211.2, the design and installation of cold-formed steel nonstructural members shall comply with which standard?

• AAISI S240
• BAISC 360
• CAISI S100 only, with no framing standard
• DAISI S220

IBC 2018 Section 2211.1 requires which standard for cold-formed steel structural light-frame systems such as load-bearing walls?

• AAISI S220
• BASTM C645 only
• CAISI S240
• DGA-216

IBC 2018 Section 1607.15 requires interior walls and partitions taller than 6 feet, including finishes, to resist a horizontal load of not less than which value?

• A5 psf
• B15 psf
• C20 psf
• D40 psf

Per IBC 2018 Table 1604.3, what is the deflection limit for an interior partition with other brittle finishes (not plaster or stucco)?

• AL/120
• BL/180
• CL/240
• DL/480

Per IBC 2018 Table 1604.3, an interior partition finished with plaster or stucco is limited to which deflection?

• AL/120
• BL/240
• CL/360
• DL/600

IBC 2018 Table 1604.3 allows which deflection for an interior partition that has a flexible finish?

• AL/120
• BL/240
• CL/360
• DNo deflection limit applies

IBC 2018 Section 718.2.2 requires fireblocking in concealed stud-wall spaces horizontally at intervals not exceeding what distance?

• A4 feet
• B8 feet
• C10 feet
• D25 feet

Besides the 10-foot horizontal interval, where else does IBC 2018 Section 718.2.2 require fireblocking in concealed stud-wall spaces?

• AVertically at the ceiling and floor levels
• BOnly at mid-height of every stud
• COnly where electrical boxes occur
• DOnly in load-bearing walls

In IBC 2018 Chapter 7, corridor walls and dwelling-unit separations are typically which kind of rated wall, as opposed to a fire barrier?

• AFire partition (Section 708)
• BSmoke barrier (Section 709) only, with no fire rating
• CFire wall (Section 706) that must be structurally independent
• DDraftstop only, with no wall rating

IBC 2018 Section 1206.2 requires walls separating dwelling units to have a laboratory sound transmission class (STC) of not less than which rating?

• ASTC 25
• BSTC 35
• CSTC 50 (or 45 if field tested)
• DSTC 70

IBC 2018 Table 2506.2 identifies which pair of standards for nonstructural steel framing used with gypsum board?

• AAISI S240 for the members and ASTM C1007 for installation
• BAISC 360 for the members and AWS D1.1 for installation
• CASTM A36 for the members and AISC 303 for installation
• DAISI S220 for the members and ASTM C754 for installation

IBC 2018 Section 2508 requires gypsum board and gypsum panel products to be installed in accordance with which documents?

• AASTM C840 or GA-216
• BASTM C645 only
• CAISC 360
• DNFPA 13 only

IBC 2018 Section 2509 requires which type of panel as the tile base on shower and public-toilet walls, rather than regular gypsum board?

• AStandard 1/2-inch gypsum wallboard
• BAsphalt-impregnated fiberboard
• CCement board, glass-mat gypsum backer, fiber-cement, or fiber-reinforced gypsum complying…
• DUnfaced mineral-wool board only

The joint at the top of a fire-resistance-rated metal-stud partition, where the wall meets the structure and a deflection track is used, must be protected in accordance with which IBC 2018 provision?

• ASection 803 interior-finish flame-spread tables only
• BSection 715 fire-resistant joint systems (typically a listed head-of-wall joint)
• CSection 1202 ventilation only
• DNo protection is required if the studs are 18 mil

IBC 2018 Section 2504.1.2 requires steel framing that supports gypsum board or gypsum panel products to comply with which chapter?

• AChapter 19 (concrete)
• BChapter 21 (masonry)
• CChapter 22 (steel)
• DChapter 31 (special construction only)

IBC 2018 Section 713.4 requires a shaft enclosure connecting four or more stories to have a fire-resistance rating of not less than which value?

• A30 minutes
• B1 hour
• C2 hours
• D4 hours

Cold-formed steel studs and track delivered to a C-4F job should be identifiable as to which of the following?

• AManufacturer identification, steel thickness (mils), and coating designation
• BOnly the job-site paint color chosen by the superintendent
• COnly the length of the bundle
• DNo marking is required on nonstructural members

IBC 2018 Section 1607.5 requires a uniformly distributed floor live-load allowance of not less than 15 psf for movable partitions in office buildings. How does that 15 psf value relate to C-4F stud design?

• AIt is the horizontal load used to size every interior metal stud
• BIt replaces Table 1604.3 deflection limits
• CIt is a vertical floor live-load allowance for partition weight, not the 5 psf horizontal…
• DIt is the required STC rating

In nonstructural metal framing, what is the floor or ceiling runner that receives the studs commonly called?

• ATrack (U-shaped runner)
• BKing stud
• CCarrying channel
• DResilient channel

What is the standard cross-section of a nonstructural sheet-metal wall stud?

• AA hot-rolled W-shape
• BA solid rectangular bar
• CA pipe section
• DA C-shaped member with a web, flanges, and return lips

If drawings say “steel studs at 16 inches o.c.,” what does “o.c.” mean?

• AOn center — the spacing from the center of one stud to the center of the next
• BOutside corner
• COver coating
• DOpen channel only at the ends

What is the most common web depth for interior nonstructural metal studs that replace a 2×4 wood wall?

• A7/8 inch
• B10 inches
• C14 inches
• D3-5/8 inches

Conventional (non-EQ) 25-gauge nonstructural studs have a minimum base-steel thickness of which value?

• A0.0147 inch (15 mil)
• B0.0428 inch (43 mil)
• C0.0179 inch (18 mil)
• D0.100 inch

ASTM C645 requires nonstructural steel framing to have a metallic coating of not less than which designation, or an equivalent corrosion resistance?

• AG40 (Z120)
• BG90 only; G40 is prohibited
• CNo coating; bare black steel is required
• DPainted primer with no zinc

Which screw type is used to attach gypsum board to 25-gauge (18-mil) steel studs?

• AType W coarse-thread wood screws
• BType G gypsum-to-gypsum screws as the only fastener into the stud
• CLag screws
• DType S fine-thread steel screws (ASTM C1002 self-piercing)

What is the primary purpose of the factory punchouts (knockouts) in a steel stud web?

• ATo reduce the stud to a structural load-bearing rating
• BTo mark the exact screw locations for gypsum board
• CTo identify the stud as hot-rolled steel
• DTo provide openings for bridging channels and for routing utilities

What is the correct first installation step when framing a straight nonstructural metal-stud partition?

• ASnap layout lines and fasten the floor and ceiling tracks, then set the studs
• BHang all gypsum board, then slip studs in from the end
• CStand all studs plumb with no tracks and toenail them to the slab
• DWeld each stud to a structural beam before placing track

Why are nonstructural steel studs cut slightly shorter than the floor-to-ceiling opening?

• ASo the stud can be inserted into the tracks and so minor slab or deck movement does not b…
• BTo make the wall a load-bearing wall
• CTo eliminate the need for any track
• DBecause ASTM C645 prohibits full-height studs

What cold-formed member is commonly used as furring on a soffit or to receive gypsum on a ceiling?

• AHot-rolled W8 beam
• BConcrete masonry unit
• CWood 2×12 joist only
• DHat-shaped furring channel (typically 7/8 inch or 1-1/2 inches deep)

Which set lists common nonstructural steel-stud web depths used for interior partitions?

• A1-5/8, 2-1/2, 3-5/8, 4, and 6 inches
• B12, 16, 18, and 24 inches only
• C3/16 and 1/4 inch only
• DW12, W14, and W16

In the SSMA designation 362S125-18, what does the number 362 identify?

• AThe flange width in millimeters
• BThe yield strength in ksi
• CThe web depth in 1/100 inch (3.62 inches, called 3-5/8 inches)
• DThe coating weight in oz/ft²

In an SSMA designation, what do the letters S and T stand for?

• AS = stud (C-shape) and T = track (U-shape)
• BS = structural and T = temporary
• CS = screw and T = tie
• DS = stainless and T = tin

After a steel stud is set in the tracks, what alignment check is required before the wall is sheathed?

• AThe stud must be plumb and the flanges aligned so gypsum will lie flat
• BThe stud must lean 1 inch in 8 feet toward the finish side
• COnly the floor track needs to be straight; studs may wander
• DPlumb is never checked on nonstructural walls

How is a straight partition typically located on the slab before the floor track is fastened?

• ABy guessing from the nearest column
• BBy snapping a chalk line (or using a laser) on the approved wall layout
• CBy fastening track wherever leftover pieces fit
• DBy hanging gypsum first and tracing the board edge

What is a common, accepted way to fasten steel floor track to a concrete slab?

• APowder-actuated pins or concrete screws at the specified spacing
• BHot-melt glue only
• CDuct tape
• DFriction, with no fasteners

Besides 16 inches on center, what other stud spacing is commonly specified for interior metal-stud partitions when the gypsum and limiting-height tables allow it?

• A24 inches on center
• B48 inches on center
• C6 feet on center
• DRandom spacing as studs are leftover

Which gypsum panel is specifically formulated for fire-resistance-rated metal-stud assemblies and is typically 5/8 inch thick?

• AType X gypsum board
• BStandard 1/4-inch gypsum backing board only
• CCement board with no gypsum core
• DFoil-faced paper only, with no gypsum

What is the purpose of bridging or bracing on a metal-stud wall?

• ATo finish the gypsum joints
• BTo replace the floor track
• CTo increase the zinc coating to G90
• DTo provide lateral support to the stud flanges so the studs do not twist or buckle betwee…

What is a chase wall in metal-stud framing?

• AA single row of studs with no cavity
• BTwo parallel rows of studs that create a wide cavity for plumbing or ducts
• CA structural moment frame
• DA concrete shear wall

Why is resilient channel (RC-1) installed on metal studs?

• ATo improve sound isolation by decoupling the gypsum from the studs
• BTo make the wall load-bearing
• CTo replace G40 galvanizing
• DTo serve as the floor track

ASTM C645 requires a conventional nonstructural stud flange to be not less than which width?

• A1/2 inch
• B3/4 inch
• C1-1/4 inches
• D3 inches

Nonstructural steel studs are commonly stocked in which lengths for cutting to floor-to-ceiling height?

• AOnly 36-inch lengths
• B8-foot, 10-foot, and other standard cut lengths (often 9, 12, or custom)
• COnly 30-foot mill beams
• DOnly 4-inch pieces

A straight 20-foot partition is laid out at 16 inches on center with a stud at each end and no openings. How many studs are required?

• A12
• B15
• C16
• D20

A straight 12-foot wall is framed at 16 inches on center with studs at both ends and no openings. How many studs are required?

• A8
• B9
• C10
• D12

A straight 24-foot partition is framed at 24 inches on center with a stud at each end and no openings. How many studs are required?

• A12
• B16
• C25
• D13