Section II model answers (Q11–15)

2025

Q11 (2 marks) Outline ONE critical step necessary when taking measurements from the carcase to produce the drawer. [T15]

Measure the internal width, height and depth of the carcase opening at several points. Then subtract the clearance required for the drawer runners (from the runner specification) from the width, so the drawer fits the carcase and slides freely without binding.

Q12 (2 marks) Outline ONE key characteristic of carcase joints in woodworking. [T8]

Carcase joints join wide boards or panels at right angles to form a box or cabinet: sides, top, bottom and shelves. A key characteristic is that they support load across the full width of the panel and resist racking, so the carcase stays strong and square. Examples are housing, rebate and dovetail joints.

Q13 (2 marks) What are the differences between the use of a band saw and a table saw? [T15]

A band saw is used for cutting curves and irregular shapes and for resawing thick stock. A table saw is used for straight, precise cuts, such as ripping boards along the grain to width and cutting sheet material to size.

Q14 (4 marks) Describe a suitable bending process that could be used to create the curved feature legs for the table shown. [T6]

Laminating is suitable. First make a former to the curve of the leg from layers of MDF, allowing a little extra curve for springback. Rip thin strips of straight-grained timber that bend easily, keeping them in order, and dry-clamp them to check the fit. Spread urea-formaldehyde or epoxy glue on the mating faces, stack the strips and clamp them to the former from the centre outwards (or use a vacuum bag). Wipe off squeeze-out. When the glue has fully cured, remove the leg, clean the edges with a jointer or router and template, then cut to length and sand.

Q15 (5 marks) Recommend set-up, startup and maintenance procedures for operating high-risk machinery. [T12]

Set-up: only trained, authorised operators should use the machine. Check that the area is clear and well lit, dust extraction is connected, and the correct sharp blade is fitted with all guards in place and adjusted. Start-up: wear safety glasses, hearing protection and a dust mask, remove loose clothing and jewellery, test the emergency stop, let the machine reach full speed before cutting, and use push sticks and fences. Maintenance: isolate the power and lock out and tag out before any adjustment or blade change. Regularly inspect and replace worn blades and belts, lubricate moving parts and clean away dust, and record all work in a maintenance log. Report and tag out faulty machines immediately.

2024

Q11 (1 mark) Identify a robust and versatile adhesive that also acts as a feature on a finished project. [T5/notes 3.4]

Epoxy resin (it can be tinted and used to fill voids as a decorative feature).

Q12 (2 marks) Outline ONE strategy to minimise wastage and ensure economical usage of materials in woodworking projects. [T14]

Prepare an accurate cutting list and draw an economical layout of all parts on the boards or sheets before cutting, so parts are nested together and offcuts are kept for small components. This reduces the number of boards or sheets bought and the waste sent to landfill.

Q13 (3 marks) Describe the difference between a mitre saw and a compound mitre saw in their function and use. [T15]

A mitre saw cuts across a board at an angle by pivoting horizontally, such as a 45° mitre for a picture frame. A compound mitre saw can also tilt the blade (bevel) while it is pivoted, so it cuts a mitre and a bevel in one cut. This is used for compound angles such as crown mouldings, splayed legs or angled frames.

Q14 (4 marks) Explain ONE crucial feature that woodworkers should consider when selecting a router for their woodworking projects. [T15]

Variable speed is a crucial feature. Large-diameter bits, such as panel-raising or large round-over bits, have a much higher rim speed, so they must run at lower rpm to cut safely without burning the timber or overheating the bit. Small bits need high speed to give a clean cut. A router with variable speed can therefore be matched to each bit and timber, giving a better-quality edge and safer operation across a wider range of projects.

Q15 (5 marks) Explain TWO work health and safety (WHS) risks that should be assessed prior to preparing and using recycled timber in a project. [T13]

First, recycled timber often contains hidden nails, screws and bolts. If a saw, planer or thicknesser blade strikes metal, the blade can chip or shatter and throw fragments, or the timber can kick back, causing eye, face and hand injuries. The timber must therefore be inspected, scanned with a metal detector and de-nailed before machining, and eye and face protection worn. Second, old timber may be coated in lead-based paint or treated with CCA (copper chrome arsenate) preservative. Sanding or machining it releases toxic dust that can be inhaled. Its history should be checked and paint tested for lead; CCA-treated timber should not be machined or burnt, and dust extraction and a P2 respirator should be used.

2023

Q11 (1 mark) Name the category of the cabinet fittings shown. [notes 3.5]

Name the category exactly from the diagram (for example hinges, drawer runners, catches or knock-down fittings). The diagram is not reproduced here; check the paper and marking guidelines.

Q12 (2 marks) Outline an environmental benefit of using manufactured boards. [T5]

Particleboard and MDF are made from sawmill residues, chips, thinnings and small-diameter plantation logs that would otherwise be wasted. Using them makes fuller use of each tree, so fewer large logs need to be harvested.

Q13 (3 marks) A 2.5 m × 1.5 m table top requires TWO coats of polyurethane. 1 L costs $45 and covers 15 m². Calculate the cost. [T16]

Area = 2.5 × 1.5 = 3.75 m². Two coats = 3.75 × 2 = 7.5 m². Litres = 7.5 ÷ 15 = 0.5 L. Cost = 0.5 × $45 = $22.50.

Q14 (4 marks) Describe the process of cutting veneers to produce plywood. [T4]

Logs are debarked, cross-cut into billets and softened by soaking or steaming so the timber cuts cleanly. Each billet is mounted in a rotary lathe and spun against a long knife, peeling off a continuous ribbon of veneer of even thickness. A pressure bar stops the veneer splitting. The ribbon is then clipped into sheets of the required width, removing defects, and the sheets are dried and graded ready for lay-up. (Decorative face veneers may instead be sliced: flat/crown, quarter or rift slicing.)

Q15 (5 marks) Explain the process of seasoning timber through natural air drying. [T1]

Air seasoning removes moisture from green timber until it is close to the outdoor equilibrium moisture content, reducing later shrinkage and warping. The converted boards are stacked on a level, well-drained site on bearers raised off the ground, so air circulates underneath and ground moisture and termites are avoided. Each layer is separated by stickers of equal thickness, lined up vertically, so air flows over every board and the stack stays flat. A roof protects the stack from rain and direct sun, weights hold the top layers flat, and the board ends are sealed to prevent end splits. Over months, or years for thick hardwoods, moisture slowly evaporates. The process is cheap and causes little stress, but it is slow and cannot get below outdoor EMC.

2022

Q11 (1 mark) Identify a machine used in industry to dress timber. [T15]

Four-sided moulder (or a planer/jointer and thicknesser).

Q12 (2 marks) Why is equilibrium moisture content (EMC) important when selecting timber? [T2]

EMC is the moisture content at which timber neither gains nor loses moisture to the surrounding air. Timber should be close to the EMC of where it will be used; otherwise it will shrink (causing gaps and loose joints) or swell (causing cupping and buckling) after the product is made.

Q13 (3 marks) Calculate the cost of constructing the stool (top 2 × 300, legs 4 × 200, rails 4 × 200; $/m given). [T16]

Top: 2 × 0.3 m × $13.00 = $7.80. Legs: 4 × 0.2 m × $7.25 = $5.80. Rails: 4 × 0.2 m × $1.95 = $1.56. Total = $15.16.

Q14 (4 marks) Explain how recycling and reusing can be used to address timber shortages. [T14]

Reusing salvages whole timber members, such as old beams, floorboards, wharf and bridge timbers, and re-machines them for furniture and flooring. This supplies well-seasoned, often rare hardwood without felling new trees. Recycling reprocesses waste such as offcuts, sawdust and chips into particleboard and MDF, so material that would go to landfill replaces solid timber in carcases and panels. Both stretch the limited supply of new logs, which became tight after plantations burnt in the 2019–20 bushfires and demand rose during the 2021 housing boom, therefore easing shortages and prices.

Q15 (5 marks) Explain the benefits of using knock-down fittings. [T7]

Knock-down fittings such as cam locks, cross dowels and connector bolts let furniture be assembled and dismantled. Because parts can be shipped flat, the packed volume is much smaller, so freight and storage costs fall and products are cheaper (e.g. IKEA flat-pack). Customers can assemble the product with basic tools, and it can be taken apart to move house or replace a part. The holes are drilled quickly and accurately by CNC or multi-boring machines, so parts are interchangeable, which suits mass production and lowers labour costs. KD fittings also work well in particleboard and MDF, where traditional joints are weak, although they are generally less strong and less refined than glued joints.

2021

Q11 (1 mark) Identify the tool shown. [notes 3.11]

Sliding bevel (2021 marking feedback).

Q12 (2 marks) What are the advantages of kiln seasoning compared to air seasoning? [T2]

Kiln seasoning is much faster (days or weeks rather than months or years) because heat, humidity and airflow are controlled. It can also dry timber to a precise, lower moisture content suited to indoor furniture, and the heat kills insects and fungi.

Q13 (3 marks) Complete the cutting list and costs for the Tasmanian oak coffee table (top 140 × 19 DAR, 40 mm overhang). [T16]

Work out the top size first: frame length + 80 mm and width + 80 mm (40 mm overhang on each side). Number of top boards = top width ÷ 140, rounded up. Cost = number of boards × top length (m) × $20.00. Add the given leg, long-rail and short-rail costs for the total. Exact figures depend on the diagram dimensions; check the 2021 marking guidelines.

Q14 (4 marks) Describe how plywood is manufactured from a log. [T4]

Logs are debarked, cut into billets and softened by soaking or steaming. Each billet is rotary-peeled on a lathe into a continuous veneer, which is clipped into sheets and dried to a low moisture content, then graded and patched. Glue is applied and the veneers are laid up with the grain of each layer at 90° to the next, using an odd number of plies. The lay-up is hot-pressed so heat and pressure cure the glue, then the sheets are trimmed, sanded to thickness and graded.

Q15 (5 marks) Describe the environmental factors that should be considered when creating timber furniture. [T14]

Timber selection: use plantation, recycled or certified (FSC/Responsible Wood) timber rather than illegally logged or rare exotic species, to protect native forests and biodiversity. Economical use: plan cutting lists and sheet layouts to minimise waste, and reuse offcuts. Manufactured boards make use of residues, but low-formaldehyde (E0/E1) boards should be chosen to limit emissions. Finishes: low-VOC water-based finishes reduce air pollution, and solvents and rags must go to approved waste facilities. Life cycle: durable, repairable designs and flat-pack transport reduce resource use and freight emissions, and designing for disassembly allows recycling at the end of the product's life.

2020

Q11 (1 mark) Identify a suitable Australian hardwood for making the outdoor bench seat. [notes 3.1]

Spotted gum (also blackbutt, jarrah, ironbark or tallowwood).

Q12 (2 marks) The edges of the bench seat are rounded. Outline reasons for this edge treatment. [notes 3.8]

Rounded edges are more comfortable to sit on and safer, as there are no sharp arrises to cut or bruise users. They are also less likely to splinter or chip, and the finish adheres better and lasts longer on a rounded edge than on a sharp one.

Q13 (3 marks) Complete the cutting list for the outdoor bench seat. [T16]

Count each part from the side view and front details (legs, rails, cleats, slats, cross support), take lengths from the drawing, and multiply quantity × length to give the total length for each part. The exact table depends on the diagram; check the 2020 marking guidelines.

Q14 (4 marks) Outline a method of production for a suitable joint to attach the cross support to the bottom rails. [T10]

Use a mortise and tenon joint. Mark the tenon (about one-third of the rail thickness) and the mortise with a mortise gauge set to the chisel width. Cut the mortise in the bottom rail with a mortise chisel or a hollow-chisel mortiser, slightly deeper than the tenon length. Saw the tenon cheeks and shoulders with a tenon saw (or a tenoning jig on the table saw), and pare it to a firm fit. Dry-assemble to check, then glue with an exterior adhesive (e.g. epoxy) and cramp, checking for square.

Q15 (5 marks) Name a suitable finish for the outdoor bench seat and describe the steps in preparing and applying it. [T11]

Use an exterior decking oil (a penetrating oil with UV and water repellents). Preparation: fill holes with exterior filler, then sand with the grain through the grits (e.g. 120 then 180). Raise the grain with a damp cloth, let it dry and sand lightly again, then remove all dust. Application: brush or wipe the oil on along the grain, let it soak in, and wipe off the excess after the recommended time. Apply two or three coats, allowing drying time between them, and re-oil regularly as the seat weathers.

2019

Q11 (1 mark) State ONE property of plywood, other than price, that makes it appropriate for this project. [T5]

Strength in all directions (cross-laminated veneers); also stable, available in large sheets, easy to cut and join.

Q12 (2 marks) Sketch and label a suitable carcase joint for the fixed horizontal shelf. [T8]

Sketch a housing (trench) joint: show the side panel with a trench about one-third of its thickness deep, and the shelf end fitting into it. Label the side, shelf, trench and depth; a stopped housing hides the joint at the front.

Q13 (3 marks) Each sheet is 2440 × 1220 × 16 mm. Calculate the minimum number of sheets for 150 units. [T16]

Each box needs 5 pieces of 590 × 390 mm. 12 pieces fit on one sheet. 150 × 5 = 750 pieces. 750 ÷ 12 = 62.5, so 63 sheets.

Q14 (4 marks) Describe the processes involved, from log to sheet, in manufacturing one of the plywood sheets. [T4]

Logs are soaked or steamed and debarked, then peeled into veneers on a rotary lathe. The veneers are clipped to size and dried, which also protects them from fungal decay. Glue is applied and the veneers are arranged with the grain alternating at 90° in an odd number of plies. Heat and pressure in a hot press cure the glue. Finally, the sheet is trimmed to size and sanded to the correct thickness.

Q15 (5 marks) Explain the processes needed to produce one of the corner rebate joints using hand tools and portable power tools. [T10]

Mark out the rebate with a marking gauge: the width equals the 16 mm thickness of the mating panel, and the depth is about half the board's thickness. Clamp the panel securely to the bench. Cut the rebate with a portable router fitted with a rebating bit (or a straight bit and fence), taking several shallow passes to prevent tear-out and maintain accuracy. Clean the corner with a shoulder plane or chisel if required. Dry-assemble to check the fit, then apply PVA, assemble, and nail or screw through the side into the rebate. Cramp, check for square by measuring the diagonals, and wipe off excess glue.

2018

Q11 (1 mark) Identify the portable power tool that would produce the most accurate rebate in a frame for glass. [T15]

Router (with a bearing-guided rebating bit).

Q12 (2 marks) Outline a method for checking a rectangular table frame for squareness without a right-angle square. [T15]

Measure both diagonals from corner to corner with a tape measure. If the diagonals are equal (and opposite sides are equal), the frame is square; if not, adjust the cramps until they are.

Q13 (3 marks) Justify the selection of a specific manufactured board for a bathroom cabinet carcase. [T5]

HMR (high moisture resistant) melamine-faced particleboard is suitable. It is made with moisture-resistant resin, so it resists swelling in the humid bathroom. It is dimensionally stable, and its melamine surface is waterproof and easy to clean. With the edges sealed by edge banding, it lasts well at low cost. (Marine or exterior plywood would also be justified because of its water-resistant glue.)

Q14 (4 marks) Describe ONE technique of inlaying timber, including the benefits of using this technique. [notes 3.8]

A strip inlay can be set using a router. Cut the inlay strip accurately to width and thickness on a saw. Set a router with a straight bit the same width as the inlay and a fence, and test the depth on scrap. Rout a trench parallel to the edge, square the ends of the trench with a chisel, and cut the inlay ends square. Glue the strip in, cramp, and when it is dry plane or scrape it flush. The technique is accurate and repeatable, and it adds a decorative contrasting feature that increases the value of the piece.

Q15 (5 marks) Describe the advantages of each of the drawer runners shown (full-extension metal; timber runners). [notes 3.5]

Full-extension metal runners carry heavy loads smoothly on ball bearings and let the drawer open fully, so the whole drawer is accessible. They are fast to install with templates in mass production, and the drawer can be removed without unscrewing the runner. Timber runners are cheap to make from offcuts and can be custom-made for any drawer size. With kickers and side guides they control sideways and tipping movement, and they are easy to replace when worn. They also suit traditional furniture.

2017

Q11 (1 mark) Identify a portable power tool used to cut an internal curved shape in plywood. [T15]

Jigsaw.

Q12 (2 marks) Outline the benefits of using recycled timber in furniture production. [T14]

Recycled timber is old, well-seasoned and stable, and has an attractive rustic character. Reusing it also reduces the need to fell new trees and keeps timber out of landfill, lowering environmental impact.

Q13 (3 marks) Describe the practices used to minimise the environmental issues associated with timber finishing. [T11]

Use low-VOC water-based finishes instead of solvent-based ones to reduce air pollution. Spray only in booths with filters that capture overspray and fumes. Never pour leftover finish or solvents down drains; take them, and used rags, brushes and newspaper, to approved chemical waste facilities. Buy and mix only the amount needed to reduce waste.

Q14 (4 marks) Describe TWO benefits of using dovetail joints in drawer construction. [T8]

First, mechanical strength: the flared tails and pins interlock, so the drawer front cannot be pulled off when the drawer is opened, even if the glue fails. This makes the drawer durable through years of use. Second, appearance: visible dovetails are attractive and signal quality craftsmanship, adding value to the furniture. They can be cut by hand or with a router jig for faster production.

Q15 (5 marks) Describe a process to produce a laminated curved component for a rocking chair. [T6]

Make a former of the rocker curve from layers of MDF. Rip thin strips of timber on the table saw and keep them in order. Dry-clamp the strips to the former to check the curve. Apply glue (urea-formaldehyde or epoxy) to one side of each strip, stack them, and clamp them around the former from the centre outwards, or press them in a vacuum bag. Remove excess glue and check the curve for twist. Leave the glue to cure, then remove the clamps, clean the edges, shape the ends and finish.

2016

Q11 (1 mark) What is the purpose of the symbol shown on the timber? [notes 3.6]

It identifies the face side (the face mark), the reference surface from which all other faces, edges and measurements are worked.

Q12 (3 marks) Describe a process for making a widening joint using a portable power tool. [T9]

Place the dressed boards edge to edge with the growth rings alternated, and mark the biscuit positions across each joint. Using a biscuit jointer referenced from the face side, cut matching slots in both edges. Glue the slots and edges, insert the biscuits, bring the boards together and cramp with sash cramps, alternating above and below. Check for flatness and wipe off excess glue.

Q13 (3 marks) Compare the use of oil-based and water-based finishes on timber. [T11]

Both protect and enhance timber and can be brushed or sprayed. Oil-based finishes give a warm amber depth, level well and are very hard-wearing with fewer coats, but they dry slowly, smell strongly, are flammable and yellow with age. Water-based finishes dry quickly so they can be recoated sooner, stay clear, have low odour and clean up with water. However, they need more coats and lack the rich glow of oil.

Q14 (3 marks) Describe the process needed to restore the edge of the chisel shown. [T15]

Grind the bevel on a bench grinder at about 25° to remove the damage, dipping the chisel in water often so it does not overheat and lose its temper. Then hone a secondary bevel at about 30° on an oilstone or waterstone using the correct lubricant. Finally, remove the burr from the back on the stone or a leather strop.

Q15 (5 marks) Explain the advantages of using manufactured boards rather than solid timber for a dining table top. [T5]

Manufactured boards are available in large sheets, such as 2400 × 1200 mm, so the top can be made in one piece without widening joints, saving time and avoiding joints opening. They are dimensionally stable because cross-laminated veneers or randomly arranged particles prevent shrinking, swelling, cupping and warping, so the top stays flat. They have uniform strength with no knots or splits, and plywood does not split when fixed near its edges. A veneer of figured timber gives the look of an expensive species economically. They are usually cheaper than solid timber, and they make use of residues and small plantation logs.

2015

Q11 (1 mark) What is a purpose of dry cramping? [notes 3.9]

To test that all joints fit accurately before gluing (and to set the cramps and rehearse the glue-up).

Q12 (3 marks) Explain why the growth rings on widening-jointed boards are alternated. [T9]

Timber moves as its moisture content changes, and back-sawn boards tend to cup. If all the boards are laid with their rings the same way, the cupping adds up across the whole top, causing a large curve. By alternating the growth rings, each board cups in the opposite direction to its neighbour, so the movement is balanced. The top stays flatter and can be fastened securely to the frame.

Q13 (3 marks) Name an alternative joining technique and outline TWO advantages it has over traditional techniques. [T7]

The Festool Domino loose-tenon joint. First, it is much faster than a hand-cut mortise and tenon: a machine cuts matching mortises and a ready-made domino is glued in. Second, it is accurate and repeatable, and the large gluing area gives strength similar to a traditional mortise and tenon, reducing production time and cost.

Q14 (3 marks) Why would a cabinet-maker use quarter-sawn timber when making fine-quality furniture? [T3]

Quarter-sawn timber has its growth rings close to 90° to the face, so it shrinks less in width and is much less likely to cup or warp. This keeps panels and joints stable. It also shows attractive ray figure and wears evenly, making it worth its higher cost for fine furniture.

Q15 (5 marks) Describe the steps used to produce the laminated veneer stool shown. [T6]

Select the veneers and a suitable adhesive (urea-formaldehyde) and make a mould or jig of the stool's shape. Cut the veneers to size, allowing for waste. Lay up the veneers with glue between each layer and press them over the mould, using cramps or a vacuum bag and press. Leave the glue to cure fully, then remove the moulding. Trim the edges to final shape and cut the handholds with a router and template. Sand all surfaces and apply a suitable finish.