Arizona ROC C-1/C-10 Drywall and Acoustical Systems Examination

According to Gypsum Association GA-216 standards, what is the minimum required penetration depth for drywall screws attached into wood framing members?

• A5/8 inch
• B3/8 inch
• C1/4 inch
• D1 inch

When attaching 5/8-inch gypsum wallboard to 25-gauge non-structural steel studs, what is the minimum penetration required for Type S drywall screws into the metal member?

• A1/2 inch
• B3/8 inch
• C5/8 inch
• D3/4 inch

What is the maximum allowed fastener spacing when single-layer 1/2-inch gypsum board is attached to ceiling joists spaced 16 inches on center using Type W screws without adhesive?

• A7 inches on center
• B8 inches on center
• C12 inches on center
• D16 inches on center

Which type of fastener is specifically designed with sharp point threads for attaching gypsum board to 25-gauge light-steel studs?

• AType W screws
• BType G screws
• CType S-12 screws
• DType S screws

A drywall contractor is installing 5/8-inch Type X gypsum panels onto 14-gauge heavy structural steel framing studs. Which fastener must be used?

• AType S-12 self-drilling screws
• BType S sharp point screws
• CType W coarse thread screws
• DType G laminating screws

Which type of screw fastener features coarse, wide-spaced threads designed to grip wood fibers when attaching gypsum board to wood studs?

• AType S-12 screw
• BType W screw
• CType G screw
• DType S fine thread screw

When installing drywall on wall partitions, how should butt end joints in adjacent runs be arranged per GA-216 standards?

• AAligned directly inline on the same stud bay
• BStaggered by at least 12 inches on adjacent studs
• CStaggered by at least 24 inches on adjacent studs
• DOffset by no more than 6 inches between wall panels

When mechanically fastening standard metal corner bead to outside drywall corners prior to taping, what is the maximum recommended fastener spacing along each flange?

• A6 inches on center
• B12 inches on center
• C16 inches on center
• D9 inches on center

Per ASTM C840 and GA-216, what is the maximum continuous length of a drywall partition wall allowed before installing an expansion/control joint?

• A30 linear feet
• B50 linear feet
• C20 linear feet
• D100 linear feet

Under GA-216, what is the maximum area of a continuous gypsum board ceiling expanse permitted without providing perimeter relief or a control joint?

• A1,200 square feet
• B900 square feet
• C500 square feet
• D2,500 square feet

Why must drywall panels installed on wall framing be held up off the raw concrete floor slab by at least 3/8 to 1/2 inch?

• ATo allow room for baseboard backing strips
• BTo accommodate floor framing deflection only
• CTo prevent moisture wicking from the slab into the gypsum core
• DTo provide air circulation behind the partition cavity

When installing standard 1/2-inch regular gypsum board parallel to ceiling joists, what is the maximum permitted joist spacing per ASTM C840?

• A24 inches on center
• B19.2 inches on center
• C12 inches on center
• D16 inches on center

What are the minimum required fastener clearances from paper-bound factory edges and cut end edges of drywall panels per GA-216?

• A3/8 inch from bound edges and 1/2 inch from cut ends
• B1/2 inch from bound edges and 3/8 inch from cut ends
• C1/4 inch from all edges
• D3/4 inch from bound edges and 1 inch from cut ends

Which drywall product specification is required on single-layer wood-framed walls to achieve a standard UL-listed 1-hour fire-resistance rating?

• A1/2-inch moisture-resistant greenboard
• B5/8-inch Type X gypsum board
• C1/2-inch regular gypsum board
• D1/4-inch high-flex gypsum board

When installing light-gauge steel stud framing intended to receive drywall substrate for hard ceramic tile finishes, what is the maximum allowable stud deflection limit?

• AL/120
• BL/240
• CL/360
• DL/480

What is the standard minimum depth of metal furring channels (hat channels) used to attach drywall to interior masonry or concrete walls per ASTM C840?

• A1/2 inch
• B5/8 inch
• C1-1/2 inches
• D7/8 inch

Calculate the total number of 4x10 ft drywall sheets needed to cover the walls and ceiling of a rectangular room measuring 20 ft by 30 ft with 9 ft ceiling height, including a 10% waste factor. (Ignore door/window deductions under 30 sq ft).

• A42 sheets
• B38 sheets
• C48 sheets
• D35 sheets

When installing drywall on wall framing using drywall adhesive per ASTM C557, what is the maximum permitted supplemental screw spacing along the field of the board?

• A24 inches on center
• B16 inches on center
• C12 inches on center
• D32 inches on center

According to GA-216, when using the double-nailing method for drywall installation on ceilings, how are nails within each pair spaced, and what is the distance between pairs?

• ANails within a pair are 6 inches apart; pairs are spaced 16 inches on center
• BNails within a pair are 4 inches apart; pairs are spaced 8 inches on center
• CNails within a pair are 2 inches apart; pairs are spaced 12 inches on center
• DNails within a pair are 1 inch apart; pairs are spaced 24 inches on center

What is the minimum thickness requirement for cementitious backer units (CBU) installed over stud framing in wet locations such as tiled shower stalls per ASTM C1288?

• A1/4 inch
• B3/8 inch
• C5/8 inch
• D1/2 inch

Which specialized 1/2-inch gypsum ceiling board specification allows parallel installation across ceiling joists spaced 24 inches on center without sagging under water-based spray textures?

• A1/2-inch Sag-Resistant Gypsum Ceiling Board (ASTM C1396)
• B1/2-inch Moisture-Resistant Greenboard
• C1/2-inch Regular Type WB board
• D1/2-inch Exterior Soffit board

In non-bearing interior steel stud partitions, why is a deep-leg slotted deflection track (slip track) installed at the top of the wall?

• ATo prevent sound transmission through the ceiling plenum
• BTo allow upper floor structure vertical movement without crushing the drywall wall panels
• CTo lock studs rigidly against horizontal seismic shear loads
• DTo provide a continuous electrical grounding pathway

Where should drywall panel joints be positioned relative to door frame header corners according to GA-216?

• ADirectly aligned with the vertical door jamb line
• BAt least 1 to 2 inches away from the jamb edge
• CAt least 7 to 12 inches away from door header corners
• DDiagonal cut along the door corner radius

Estimate the minimum quantity of Type S drywall screws needed to attach 2,400 square feet of gypsum wallboard onto steel studs spaced 16 inches on center, based on standard trade estimating ratios (1,000 screws per 1,000 sq ft).

• A1,200 screws
• B1,600 screws
• C3,200 screws
• D2,400 screws

Per GA-216, what is the maximum stud spacing permitted for single-layer 3/8-inch gypsum wallboard applied directly over wall framing?

• A3/8-inch board is NOT permitted for single-layer framing application
• B16 inches on center
• C12 inches on center
• D24 inches on center

What is the correct depth setting when driving drywall screws into gypsum panel products?

• AFlush with the outer face paper surface without creating any indentation
• BSlightly dimpled below the paper surface without breaking the paper facing
• CCountersunk 1/8 inch below the face paper into the gypsum core
• DDriven until the screw head spins freely in the core

When installing resilient channels (RC-1) horizontally on vertical wood stud walls for acoustic isolation, how must the channel flanges be oriented?

• AMounting flange facing down, open leg pointing down
• BMounting flange facing sideways toward door openings
• CMounting flange facing down, attachment leg pointing UP
• DMounting flange facing up, attachment leg pointing DOWN

What restriction applies to standard water-resistant gypsum backing board (greenboard) installed on ceilings per GA-216?

• AGreenboard cannot be painted with latex primer
• BGreenboard is prohibited on ceilings in residential garage structures
• CGreenboard cannot be used in fire-rated wall assemblies
• DGreenboard must not be used on ceilings if framing spacing exceeds 12 inches o.c. for 1/2…

Which structural feature distinguishes high-impact abuse-resistant gypsum panels from standard Type X drywall panels?

• AA heavy duty face paper reinforced with embedded fiberglass mesh and high-density core
• BA solid aluminum backing sheet bonded to the rear gypsum paper
• CA core composed entirely of Portland cement and expanded shale aggregate
• DA factory-applied rubberized polyurethane exterior coating

What is the standard manufacturing width for architectural gypsum panel products manufactured under ASTM C1396?

• A36 inches (3 feet)
• B48 inches (4 feet)
• C60 inches (5 feet)
• D54 inches (4.5 feet)

Select the proper Type S screw length required to attach a single layer of 5/8-inch Type X drywall to 20-gauge steel studs.

• A1 inch
• B1-5/8 inches
• C1-1/4 inches
• D2 inches

What is the maximum allowable moisture content in wood framing members prior to drywall panel installation per GA-216 guidelines?

• A25%
• B12%
• C8%
• D19%

Which structural steel stud gauge is standard for erecting high-rise elevator shaftwall assemblies using C-T or C-H studs?

• A20-gauge steel
• B25-gauge steel
• C28-gauge steel
• D30-gauge steel

What is the primary architectural purpose of installing a metal Z-shadow bead (reveal trim) at drywall transitions?

• ATo splice two butt ends of gypsum board together without tape
• BTo create a clean recessed shadow line between drywall edges and adjacent door frames or…
• CTo seal expansion joints against water leakage in showers
• DTo provide a structural ledger for heavy wall cabinets

When laminating a face layer of drywall directly to a gypsum base layer in multi-layer construction, which fastener is specified for board-to-board attachment?

• AType S-12 self-drilling screw
• BType W coarse thread screw
• CType G laminating screw
• DType S fine thread screw

How many 4x12 foot sheets of 5/8-inch Type X drywall are needed to cover a ceiling measuring 16 feet wide by 24 feet long? (Assume exact fit without waste allowance).

• A10 sheets
• B6 sheets
• C12 sheets
• D8 sheets

Which procedure ensures proper installation of standard metal corner bead on outside 90-degree drywall corners prior to compound application?

• AAligning the bead nose tightly against corner, clinching or fastening flanges 9 inches o.…
• BGluing the flanges with silicone sealant only without mechanical fasteners
• CNailing flanges at 24 inches on center using roofing nails
• DEmbedding the bead directly in self-adhesive joint compound without fasteners or clinching

When installing drywall over insulated exterior frame walls in cold climates, where must the continuous vapor retarder (polyethylene membrane) be positioned?

• ABetween the exterior sheathing and insulation
• BOn the warm-in-winter side of insulation immediately behind the drywall
• CDirectly on top of the finished drywall face paper
• DIn the middle of the fiberglass insulation cavity

Which core additive gives Type X gypsum board superior fire resistance compared to standard regular gypsum wallboard?

• AExpanded polystyrene beads and polyurethane foam
• BSodium silicate glass crystals
• CGlass fibers and unexpanded vermiculite
• DCellulose fibers and Portland cement

What is the minimum fastener edge distance required along cut end edges of gypsum panels to prevent gypsum core blowout?

• A1/4 inch
• B3/8 inch
• C5/8 inch
• D1/2 inch

Per ASTM C636, what is the standard minimum steel wire gauge required for main runner hanger wires in suspended acoustical ceiling systems?

• A12-gauge galvanized soft-annealed steel wire
• B16-gauge copper wire
• C10-gauge aluminum wire
• D14-gauge high-tensile steel wire

What is the maximum allowable spacing along main runners for 12-gauge hanger wires supporting an intermediate-duty acoustical grid system?

• A36 inches (3 feet)
• B48 inches (4 feet)
• C60 inches (5 feet)
• D24 inches (2 feet)

How close must the first hanger wire be installed from the terminal end of a main runner where it meets the perimeter wall angle per ASTM C636?

• AWithin 12 inches of the wall
• BWithin 18 inches of the wall
• CWithin 7 inches of the wall
• DWithin 24 inches of the wall

What is the minimum number of tight 360-degree wraps required when tying off a 12-gauge hanger wire at structural attachments and main runners per ASTM C636?

• A1 full wrap
• B2 full wraps within 3 inches
• C4 loose wraps
• D3 tight wraps within 1.5 inches

What is the standard center-to-center spacing for main runners when installing a 2x4 foot acoustical tile ceiling grid module?

• A48 inches (4 feet)
• B24 inches (2 feet)
• C16 inches
• D36 inches (3 feet)

To convert a 2x4 foot suspended ceiling grid layout into a 2x2 foot grid module layout, which component must be added?

• A4-foot main runner splices
• B2-foot cross tees installed between 4-foot cross tees
• C12-gauge diagonal splay wires
• D1-foot wall channel adapters

According to CISCA suspended ceiling layout principles, how should border tile dimensions on opposite walls of a room be sized?

• ABorder tiles on one wall must be full size; opposite wall takes the remaining fraction
• BBorder tiles must be cut as narrow as possible, ideally under 4 inches
• CBorder tiles on opposite walls must be equal in width and greater than half a full tile w…
• DBorder tiles are placed only on north and west walls