Sheet Metal Journeyman Practice Test

These questions are part of the practice quiz. Start practicing

• Which statement is true about a circular take-off in ductwork?
• The relief opening of a draft hood must be kept not less than how many inches from any surface other than the appliance it serves?
• What is the primary purpose of a flange in sheet metal parts?
• What is beading?
• What device is installed to prevent a back draft occurring in an appliance?
• Gypsum ducts are for return air only and limited to what maximum temperature in °F?
• What finishes protect sheet metal in humid environments?
• Intake openings in occupancies other than residential shall have a maximum screen opening size of how many inches?
• What is the primary advantage of lock seams in ductwork?
• Aluminum has to be approximately what percent thicker than steel?
• At what temperature does duct work need to be insulated?
• What is the maximum required length for a typical slot diffuser connection to the maximum flex length?
• In ductwork assembly, what does a sliding fit in a slip joint primarily facilitate?
• Which option is not a finish used to protect sheet metal in humid environments?
• What can deviations from project drawings cause in ductwork?
• Where must the exhaust from a spray booth be discharged?
• Given you are running a gas line and need to bore a hole in a joist. What is the clearance from the top to the bottom of the joist?
• What is the role of punches and dies in sheet metal fabrication?
• The purpose of a flame safeguard on a boiler is to:
• What is pattern development in sheet metal work?
• Testing of a gas line with air, carbon dioxide or which gas?
• In pattern development, what is the centerline used for?
• What process involves folding the edge to produce a smooth edge and add strength?
• What type of cut is produced by a nibbler that is different from a shear cut?
• The ceiling height used to determine the room-to-furnace volume ratio is what maximum?
• For rapid assembly with limited access or when disassembly is not required, which rivet type is preferred?
• A type B or type L vent shall terminate at least ______ feet in vertical height above the highest connected appliance draft hood or flue collar
• Which statement best describes the purpose of pattern development in sheet metal work?
• What is a burr and why must it be removed?
• A joint that allows disassembly and alignment during installation most commonly uses which feature?
• What is a pilot hole and why is it used before rivet holes?
• Any variable air volume system duct upstream of the VAV boxes shall meet seal class ______.
• A fuel fired furnace, measuring 22 cubic feet, must be placed in a room greater than how many cubic feet if it is not approved for closet installation?
• What is bend allowance?
• If kitchen exhaust interferes with appliance operation, which of the following must be provided?
• Which instrument is commonly used to measure duct pressure during an airtightness test?
• A listed gas water heater with a draft hood and a single wall metal vent connector needs to have how much clearance to combustible material?
• When selecting a bend radius for thin sheet metal, what must be verified to prevent cracking?
• What is a relief near the corner used for in sheet metal patterns?
• 26 inch round duct, positive pressure, un-reinforced long seam 4 inches W.G. can be made of which gauge?
• Using 22 ga. Paint grip, duct horizontally mounted to a wall, the allowable load per fastener is how many pounds?
• Type I hood seams are made with a continuous exterior liquid-tight joint by which method?
• What is the function of a flange in sheet metal parts?
• What minimum pitch per foot is required for the horizontal run of a vent connector?
• Refrigerant safety is determined by toxicity and which property?
• Non-metallic ducts shall have a flame spread index of 25 or less and a smoke-developed index of 50 or less.
• What test is commonly used to verify duct system airtightness?
• What is the minimum size screw for a duct riser supported from a wall?
• Which statement about leakage is true?
• For a strap hanger installation at 2.2 m spacing for a 1000 x 1000 mm duct, the hanger size should be which of the following?
• Which statement correctly reflects permit extensions?
• In gas piping, which metallic piping should not be used?
• Bend allowance is used to determine what parameter in sheet metal layout?
• Refrigerant is rated for safety by toxicity and:
• What is the purpose of a gap or seal at a seam?
• Why is material grain direction often considered in metal forming?
• What is the formula for circumference of a circle?
• If gas piping is found defective, what action should be taken?
• A wall mounted canopy hood used with a heavy duty cooking appliance shall have a minimum CFM per linear foot of hood of
• A furnace rated at 75,500 BTUH requires how many square inches of free air?
• What is the purpose of a relief cut near a bend line?
• Air exhausted from spraying operations shall be permitted to be recirculated as makeup air for unmanned spray operations provided that the vapor concentration is less than ______% of the lower flammable limit
• The maximum flame spread distance applies to which components when exposed within a plenum?
• The flame spread distance for wires and cables in a plenum is 5 feet; which of the following is true?
• For a 40x20 oval duct with a longitudinal seam, what is the duct gage?
• Rungs on a ladder SHALL NOT BE more than how many inches apart?
• What is the minimum clearance to combustible construction for exhaust serving a Type 1 hood?
• What is the primary purpose of wearing eye protection and face shields when cutting sheet metal?
• A duct that penetrates up to three floors without a fire damper must have a maximum nominal diameter of how many inches?
• Each spray booth and spray room shall have an independent exhaust duct system discharging to the
• When hanging a 36-inch round duct at 12-foot intervals, what is the minimum strap size?
• Disregarding exceptions, all boilers need a shut-off valve in the
• In area-based duct sizing, what is determined from cross-sectional area?
• A chimney for residential type or low-heat appliances shall exceed at least how many feet above the highest point where it passes through a roof?
• What is galvanizing?
• A furnace rated at 12,000 BTUH requires how many square inches of free air?
• How can you verify that a bend angle matches the drawing after forming?
• Which gas, in addition to air and carbon dioxide, is used for testing gas lines?
• Name three hand tools commonly used to cut sheet metal.
• The process by which a gas converts to a liquid when the temperature decreases is called?
• The termination point for a duct intended to exhaust flammable vapors shall be located a minimum of how many feet from any property line?
• How do you check a bend angle for accuracy?
• In a shower room scenario, the intermittent exhaust capacity should be what value?
• Which pipe material cannot be used on the exterior of a building or underground?
• How does K-factor influence bend allowances in layout?
• What is the area formula for a rectangle?
• A draft hood is located so the relief opening is not less than _____ inches from any surface except that of the appliance it serves.
• A furnace rated at 24,000 BTUH requires how many square inches of free air?
• What is the difference between a rivet and a bolt in sheet metal joints?
• What is the maximum gas pressure allowed inside a building?
• What is the overall objective of pattern development in sheet metal work?
• What is the minimum distance a floor furnace register can be from a wall?
• What is the maximum distance that 1 1/4 inch copper tubing should be supported?
• Air transferred from occupied spaces may serve as makeup air for required exhaust systems in kitchens.
• Maximum flame spread distance for combustible electrical wires and cables and optical fiber cables exposed within a plenum is how many feet?
• What are the maximum flame spread and smoke-developed indices allowed for non-metallic ducts?
• When burrs are not removed after cutting, what hazards or issues can occur?
• A pre-fab double wall vertical vent for a gas furnace is commonly known as which vent type?
• A Type L vent requires how many inches of clearance to combustibles?
• An intake ventilator measuring 14 square feet should be made of ______ ga. material.
• What is hemming?
• What minimum passage-way width is required around a boiler?
• If gas piping is found to be defective, what must be done?
• A pre-fab double wall vertical vent for a gas furnace is called which vent type?
• For intakes in non-residential occupancies, the maximum screen opening size is which of the following?
• What is a take-off elbow used for in duct routes?
• Which component is primarily monitored by a flame safeguard on a boiler?
• Why is material grain direction often considered in metal forming?
• A duct system having all transverse joints and longitudinal seams sealed is a:
• Why are gaskets and sealants used on duct joints?
• What is the primary purpose of a slip joint in ductwork?
• Which standard do Type HT requirements for factory built chimneys in dwellings with solid fuel-burning appliances fall under?
• What is the neutral axis concept used for in bending?
• When would you choose to use a pop rivet instead of a solid rivet?
• When using aluminum duct avoid which seam type?
• How would you lay out a circle of holes on a panel to ensure exact spacing?
• Why would you use a tighter radius on thin sheet metal bends?
• Supply and return air ducts in non-hazardous locations shall be supported at intervals of no greater than ______.
• Why is edge conditioning important before forming a bend?
• Which of the following statements about finishes is true for humid environments?
• A furnace rated at 7,500 BTUH requires how many square inches of free air?
• In bending, what does the neutral axis represent?
• A furnace rated at 60,000 BTUH requires how many square inches of free air?
• Which statement best identifies a good quality edge after punching or shearing?
• Which dimension is commonly seen on a sheet metal pattern drawing?
• If a 14 square foot intake ventilator is to be constructed, which sheet metal gauge is specified?
• Boilers require a shut-off valve in which part of the piping, ignoring exceptions?
• What is a slip joint and what is it used for?
• A listed smoke damper designed to resist the passage of smoke shall be provided at each point a duct or air transfer opening penetrates which barrier?
• What is the BTU rating of a direct vent gas fireplace?
• How would you minimize material waste when cutting multiple parts from a sheet?
• What is the purpose of deburring after cutting?
• A liquid that condenses from a gas by a reduction in temperature is called
• The duct described for a 40x20 oval duct with longitudinal seam uses which gauge?
• A health club shower room measuring 10 feet by 10 feet with four shower heads requires an intermittent exhaust capacity of how many CFM?
• At least how many feet of clearance shall be available between the access opening and the edge of the roof?
• Ducts and plenums serving a Type II hood shall be constructed of ______ materials.
• What is meant by the neutral axis in bending?
• Which of the following is a correct pairing of common seam types in ductwork?
• In hood duct systems, which material should be used?
• Which seam type should be avoided when using aluminum duct?
• Flat oval duct construction shall be capable of withstanding a pressure ______% greater than that of the assigned pressure class without structural failure or permanent deformation.
• Which tool is commonly used to check whether a pattern piece is square?
• Which element may be found on a sheet metal pattern drawing to convey additional information?
• Longitudinal standing seams should be fastened every how many inches?
• Who must approve the location of the gas delivery point in gas installations?
• Why is it important to follow project drawings precisely?
• What is one major advantage of using a nibbler over a shear cut when making curved contours?
• Which of the following is commonly shown as a dimension on a sheet metal pattern drawing?
• Given a machinery room ventilation system that terminates on the roof and an outside grille serving an air conditioning system in the penthouse, what is the minimum clearance between the discharge outlet and the intake for the air conditioning system?
• What is a lock seam?
• Smoke detectors shall be located downstream of an air filter and ahead of any branch connectors in the return air stream with flow greater than how many cfm?
• Which duct shape generally has fewer joints per length and thus less leakage?
• A permit to accomplish work may be extended a MAXIMUM of how many times?
• Which practice best minimizes waste by arranging parts efficiently on the sheet?
• Gypsum ducts are limited to a maximum temperature of which value?
• Which statement best describes circular take-off and rectangular take-off in ductwork?
• The return air duct to a blower type warm air furnace requires how many square inches of free air per 1,000 BTUH of rated capacity?
• Which gauge is appropriate for a 26 inch round duct with positive pressure and a long seam?
• Which pipe material cannot be used on the exterior of a building or underground?
• Which statement best describes the difference between a punched hole and a drilled hole?
• Makeup air recirculation for unmanned spray operations is permitted when vapor concentration is less than what percent of LFL?
• Which statement correctly defines pattern development?
• A chimney for a low-heat appliance must withstand a continuous flue gas temperature not exceeding how many degrees Fahrenheit?
• The minimum required volume for indoor combustion air is how many ft³/1000 BTU/hr?
• A duct is permitted to penetrate three floors or less without a fire damper at each floor as long as the duct does not exceed _____ inches nominal diameter.
• The location of the point of delivery shall be acceptable to the
• Factory built chimneys installed in dwelling units with solid fuel-burning appliances shall comply with Type HT requirements of which standard?
• A chimney for a medium-heat appliance shall extend at least how many feet higher than any portion of any building within how many feet?
• How is duct sizing determined in the area method?
• The volume of a room compared to the volume of a furnace to be installed is based on what maximum ceiling height?
• Name two common rivet types used in sheet metal work and a basic use for each.
• A typical slot diffuser connection to the maximum flex length is how many feet?
• Outdoor air openings may be located less than 10 feet horizontally from a street, alley, parking lot or loading dock, provided they are at least how many feet above such locations?
• When an isolation transformer is provided, which safety devices prevent a boiler from operating once the ungrounded side becomes interrupted?
• How does temperature affect duct joints?