Florida Certified Sheet Metal Contractor Exam

Per Florida statute, a certified sheet metal contractor's services are limited to ferrous or nonferrous metal work of which maximum gauge?

• AU.S. No. 10 gauge or its equivalent or lighter
• BU.S. No. 8 gauge or its equivalent or lighter
• CU.S. No. 12 gauge or its equivalent or lighter
• DU.S. No. 14 gauge or its equivalent or lighter

On a sheet metal layout, which pattern development method is correct for a rectangular-to-round transition fitting?

• ATriangulation
• BParallel line development
• CRadial line development
• DSingle-line projection

What is the circumference of a round duct with an inside diameter of 24 inches?

• A75.40 in
• B62.83 in
• C452.39 in
• D37.70 in

In standard sheet steel gauge numbering, how does increasing the gauge number affect thickness?

• AHigher gauge number means thinner metal
• BHigher gauge number means thicker metal
• CGauge number has no relation to thickness
• DGauge number doubles thickness each step

When hand-snipping or shearing a layout line, what allowance must be made so the finished part is not undersized?

• AKerf (material lost to the cut) must be added outside the layout line
• BKerf is subtracted from the layout line
• CKerf is ignored because it is too small to matter
• DKerf is added only on inside cuts

On a mechanical drawing, a rectangular duct labeled 24 x 12 with an arrow indicates what?

• ADuct cross-section is 24 in wide by 12 in deep, with airflow in the arrow direction
• BDuct length is 24 ft by 12 ft
• CDuct is 24 in deep by 12 in wide
• DDuct runs 24 in above the floor with a 12 in branch

Before fabricating duct runs, what must the sheet metal contractor verify in the field that contract drawings cannot guarantee?

• AActual clearances, offsets, and structural interferences
• BThe designer's pressure class selection
• CThe SMACNA seal class requirement
• DThe contractor's license number

What is the primary purpose of shop drawings submitted by the sheet metal contractor?

• ATo show how the contractor will fabricate and install ductwork in actual field dimensions
• BTo replace the contract drawings as the design document
• CTo restate the project specifications verbatim
• DTo serve as the building permit application

What is the most common material used for general HVAC supply and return ductwork in commercial construction?

• AGalvanized steel sheet
• BAluminum sheet
• CStainless steel sheet
• DBlack steel sheet

In sheet metal bending, what does the term 'bend allowance' represent?

• AThe length of material consumed along the neutral axis through the bend
• BThe angle the brake opens after forming
• CThe springback correction added to the bend angle
• DThe clearance between male and female die

What is the recommended first step before fabricating a duct run from contract drawings?

• AField-verify routing, dimensions, and clearances against actual conditions
• BImmediately begin cutting full sheets to save time
• CSubmit a change order before any measurement
• DOrder material by the contract drawing linear footage only

Which layout tool is best for striking long, true arcs at a fixed radius for radial line development of a cone?

• ATrammel
• BCombination square
• CScratch awl
• DDividers

On a Florida project, when contract drawings and specifications conflict on a duct dimension, which document governs by default?

• ASpecifications govern over drawings
• BDrawings govern over specifications
• CThe contractor picks whichever is cheaper
• DThe contractor's shop drawing governs

For galvanized duct fabrication, what dimensional tolerance is generally accepted on transverse joint lengths?

• APlus or minus 1/16 inch
• BPlus or minus 1/2 inch
• CPlus or minus 1 inch
• DPlus or minus 1/4 inch

For galvanized sheet metal ductwork, what does the G90 coating designation indicate?

• A0.90 oz of zinc per square foot of sheet (total both sides)
• B90 percent zinc purity
• C0.090 in minimum thickness
• DA 90-day corrosion warranty

Per SMACNA HVAC Duct Construction Standards, which seal class requires sealing all transverse joints, longitudinal seams, AND duct wall penetrations?

• ASeal Class A
• BSeal Class B
• CSeal Class C
• DSeal Class D

A duct operates at a 3 in. w.g. static pressure class. Per SMACNA, what is the minimum seal class required?

• ASeal Class B
• BSeal Class A
• CSeal Class C
• DNo sealing required

What is the cross-sectional area of a 20-in diameter round duct?

• A314.16 sq in
• B125.66 sq in
• C62.83 sq in
• D400.00 sq in

Which SMACNA transverse joint is a drive cleat (S-cleat) most appropriate for?

• ALow-pressure rectangular duct joints 2 in. w.g. and below
• BHigh-pressure round duct joints over 6 in. w.g.
• CLongitudinal seams on 10 in. w.g. ducts
• DIndustrial exhaust carrying corrosive fumes

Which seam is formed by folding one edge into a female pocket and hooking a male flange into it, then flattening, to make a strong longitudinal seam?

• APittsburgh lock seam
• BButton punch snap lock
• CGroove seam
• DStanding seam

Per SMACNA, what minimum galvanized steel gauge is generally required for a 24 x 12 rectangular duct at 2 in. w.g. pressure class?

• A26 gauge
• B24 gauge
• C22 gauge
• D20 gauge

What does the abbreviation 'TDC' refer to in modern rectangular duct construction?

• ATransverse Duct Connector, a rolled-on flange system
• BTop Duct Cover, a closure accessory
• CTightened Duct Connection, a bolted flange
• DThermal Duct Coating, an insulation wrap

A 90-degree bend is made in 18-gauge mild steel with an inside radius of 0.125 in. Using bend allowance BA = (0.01743 × IR + 0.0078 × T) × angle, what is the bend allowance? (18 ga = 0.0478 in)

• A0.2297 in
• B0.1148 in
• C0.0026 in
• D0.4594 in

What is the K-factor in sheet metal bending?

• AThe ratio of the neutral axis position to the material thickness
• BThe springback percentage
• CThe inside radius divided by the bend angle
• DThe die clearance ratio

What is the surface area of a 24 x 12 rectangular duct run that is 10 ft long (neglecting joints and seams)?

• A60 sq ft
• B40 sq ft
• C120 sq ft
• D2 sq ft

Approximately how much does a 4 ft x 10 ft sheet of 24-gauge (0.0239 in) mild steel weigh? (Steel density ≈ 0.2833 lb/in³)

• A39.0 lb
• B13.6 lb
• C54.5 lb
• D3.4 lb

Which longitudinal seam is formed by hooking two opposing edges and driving them together to interlock, then hammering flat?

• AGroove seam
• BPittsburgh lock
• CStanding seam
• DButton punch snap lock

Which transverse connection uses an 'S' shape slipped over both duct ends and is most common on small, low-pressure rectangular ductwork?

• ADrive (S) cleat
• BPittsburgh lock
• CTDC flange
• DAngle flange

When fabricating a rectangular elbow, what determines the throat radius and number of gore sections?

• AThe elbow's centerline radius and the desired pressure loss and air turbulence
• BThe gauge of the metal only
• CThe seam type used on the duct body
• DThe coating weight of the galvanized sheet

A branch takeoff is to be cut into the main duct. What is the correct sequence of operations?

• ALayout the opening, cut to the line, file burrs, install the takeoff collar, seal the joi…
• BCut the opening first, then layout the takeoff collar
• CInstall the takeoff collar before cutting the opening
• DSeal the joint before installing the takeoff collar

What is a transition fitting in ductwork?

• AA fitting that changes duct cross-section size or shape while keeping the same centerline
• BA fitting that changes airflow direction only
• CA fitting that adds a branch to the main duct
• DA fitting that connects two identical duct sections

For a round-to-rectangular transition, what layout method produces accurate patterns?

• ATriangulation, using true-length diagrams for each element
• BParallel line development
• CRadial line development
• DDirect scaling from the elevation view

What is the purpose of notching a sheet metal blank before bending?

• ATo prevent material from interfering or tearing at the bend corners
• BTo reduce the gauge of the metal
• CTo add decorative edges
• DTo increase the bend angle

What is the function of roof flashing in architectural sheet metal work?

• ATo direct water away from penetrations and joints where roof surfaces meet vertical walls…
• BTo add decorative trim at the roof edge
• CTo insulate the roof against heat loss
• DTo support the roof deck structurally

Which architectural sheet metal component is installed at the roof edge to terminate the roofing membrane and provide a drip edge?

• AGravel stop
• BRidge cap
• CValley flashing
• DCounter flashing

In architectural flashing, what is the difference between base flashing and counter flashing?

• ABase flashing bridges the roof-to-wall joint directly; counter flashing caps the top of b…
• BBase flashing is decorative; counter flashing is structural
• CBase flashing goes under the roofing; counter flashing goes under the insulation
• DCounter flashing is always copper; base flashing is always aluminum

What is the minimum recommended lap for step flashing courses on a sloped roof-to-wall intersection?

• A4 inches horizontal lap, with each course lapping the next by one shingle exposure
• B1 inch horizontal lap
• C12 inches horizontal lap
• DNo lap is needed if sealed with caulk

For a half-round gutter, what is the correct formula for the cross-sectional area of water the gutter can carry?

• AA = (π × r²) / 2
• BA = π × r²
• CA = 2 × π × r
• DA = r²

What is the purpose of a downspout (leader) strap?

• ATo secure the downspout to the wall at regular intervals
• BTo seal the downspout joints
• CTo connect the gutter to the downspout
• DTo cap the top of the downspout

Which metal is generally recommended for soldered gutter joints in architectural work due to its ease of soldering?

• ACopper
• BAluminum
• CStainless steel
• DGalvalume

What is a coping on a flat or low-slope roof parapet wall?

• AA metal cap that covers the top of the parapet to shed water off both sides
• BA decorative ornament at the building corner
• CThe horizontal beam below the parapet
• DThe sealant used at the roof-to-wall joint

On a standing seam metal roof panel, what does the standing seam primarily provide?

• AA raised, interlocking joint that sheds water and allows thermal movement
• BA decorative ridge along the panel
• CAdditional structural support for the roof deck
• DAn attachment point for insulation

What is the recommended minimum slope for a flat-lock soldered flat seam roof panel?

• A2:12 (about 9.5 degrees)
• B1/4:12 (about 1.2 degrees)
• C12:12 (45 degrees)
• DNo slope required if soldered

When installing a fascia wrap on existing wood fascia, what is the recommended practice at joints to allow thermal movement?

• AProvide a slip lap or expansion joint at long runs
• BSolder every joint rigidly
• CWeld the joints for maximum strength
• DGlue the joints with construction adhesive

What is a reglet in architectural sheet metal flashing?

• AA groove cut into a wall to receive and lock the top edge of counter flashing
• BA decorative band painted on the wall
• CA type of solder used for copper flashing
• DA fastener for fastening flashing to the deck