I85PREP
⌘ K
CTVET Ghana Certificate II - Carpentry study materials
CTVET Ghana Certificate II - Carpentry study resources

CTVET Ghana Certificate II - Carpentry practice questions

One question at a time. Build your CTVET Ghana Certificate II - Carpentry understanding.

First 50 of 190 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Construction planning, safe boundaries, inspections and controlled changes

What is the primary function of a riving knife installed behind the blade of a circular table saw?

  1. To cut the wood into thinner strips as it exits the blade
  2. To prevent the timber kerf from pinching the back of the blade and causing dangerous kickback Correct answer.
  3. To act as a guide for diagonal cuts
  4. To catch wood chips and redirect them to the extractor

Explanation

A suitable riving knife helps keep the kerf from closing on the back of the blade in the specified saw arrangement. It does not eliminate every kickback mechanism or replace guarding, workholding and manufacturer instructions. This conceptual identification does not authorize operating a saw.

Question 2Construction planning, safe boundaries, inspections and controlled changes

Why is a blunt wood chisel considered more dangerous to use than a sharp one?

  1. A blunt chisel is more likely to cut through metal nails.
  2. It requires excessive force to cut, which increases the likelihood of slipping and losing control. Correct answer.
  3. It produces static electricity that can cause explosions.
  4. A blunt edge is poisonous to raw timber.

Explanation

A sharp tool cuts wood fibers cleanly with minimal pressure. A blunt chisel requires the woodworker to apply excessive force, which reduces tool control and increases the risk of the chisel slipping off the workpiece and causing injury to the user.

Question 3Construction planning, safe boundaries, inspections and controlled changes

Why must sawdust and timber off-cuts be cleaned up from the workshop floor regularly?

  1. To prevent wood seasoning on the floor
  2. To eliminate slipping, tripping, and major fire hazards Correct answer.
  3. To allow the machines to run without power
  4. To make the concrete floor softer to walk on

Explanation

Appropriate housekeeping reduces trip, dust and fire hazards. It does not eliminate every risk or justify a method that disperses hazardous dust. Use the actual workshop’s suitable collection and waste procedures, compatible equipment and relevant task controls.

Question 4Wood behavior, joinery, framing and finishing decisions

What is the main difference between the teeth of a rip handsaw and a crosscut handsaw?

  1. Rip saw teeth are smaller and point backwards.
  2. Rip saw teeth are filed flat like chisels to cut along the grain; crosscut teeth are angled like knives to slice across fibers. Correct answer.
  3. Crosscut saw teeth have no set (bend) to either side.
  4. Rip saw teeth are designed only for cutting manufactured boards.

Explanation

Rip saw teeth have a flat, chisel-like cutting edge (typically 8° to 10° rake angle) designed to pare away wood fibers along the grain. Crosscut saw teeth are filed with a bevel (typically 15°) to form sharp points that slice across the wood fibers cleanly.

Question 5Wood behavior, joinery, framing and finishing decisions

On a handsaw blade, what does the 'TPI' specification stand for and what does it indicate?

  1. Timber Pressure Index; indicates the wood hardness the saw can cut
  2. Teeth Per Inch; indicates the fineness or coarseness of the cut Correct answer.
  3. Tension Path Interval; indicates the blade thickness
  4. Total Pitch Inclination; indicates the angle of the handle

Explanation

TPI stands for Teeth Per Inch. A higher TPI (e.g., 12 TPI) has smaller teeth and produces a fine, clean cut (ideal for crosscutting), while a lower TPI (e.g., 5 TPI) has larger teeth and cuts rapidly but roughly (ideal for ripping).

Question 6Wood behavior, joinery, framing and finishing decisions

What is the function of the cap iron (chipbreaker) fitted on top of the cutting iron of a bench plane?

  1. To protect the blade from getting rusty
  2. To curl and break the wood shavings just after they are cut, preventing tear-out of the grain Correct answer.
  3. To adjust the lateral alignment of the blade
  4. To lock the blade to the plane body without screws

Explanation

A correctly set chipbreaker can influence shaving formation and help reduce tear-out in an appropriate plane setup. Actual blade sharpness, mouth, grain and cutting conditions matter; it does not guarantee a tear-free surface for every timber. This is component-function recognition, not a complete machine procedure.

Question 7Wood behavior, joinery, framing and finishing decisions

How should the frog of a hand plane be adjusted when planing wood with wild, interlocking, or difficult grain?

  1. Moved backward to make the mouth opening wider
  2. Moved forward to make the mouth opening narrower Correct answer.
  3. Raised vertically to increase the blade angle
  4. Removed completely to allow the shaving to pass freely

Explanation

Moving the frog forward narrows the mouth of the plane. A narrow mouth holds the wood fibers down firmly immediately in front of the blade, preventing them from lifting and splitting ahead of the cut, which dramatically reduces tear-out on wild grain.

Question 8Wood behavior, joinery, framing and finishing decisions

Which type of wood chisel is designed with a thick, heavy cross-section and deep bolster to withstand heavy mallet blows for cutting deep mortise joints?

  1. Paring chisel
  2. Firmer chisel
  3. Mortise chisel Correct answer.
  4. Slick chisel

Explanation

A mortise chisel has a very thick, rigid blade that resists bending or breaking when levering out waste wood. It is specifically designed to be struck with a heavy mallet to chop deep, square joints.

Question 9Wood behavior, joinery, framing and finishing decisions

What is the function of the rip fence on a circular table saw?

  1. To push the wood through the blade automatically
  2. To guide the wood parallel to the blade for straight longitudinal (rip) cuts Correct answer.
  3. To hold the wood down against the table during bevel cuts
  4. To measure the height of the blade

Explanation

The rip fence is a straight metal guide clamped parallel to the saw blade. It ensures that the timber is cut at a uniform width along its entire length by keeping the timber straight as it passes the blade.

Question 10Wood behavior, joinery, framing and finishing decisions

On a mechanical thickness planer (thicknesser), what is the function of the corrugated infeed roller?

  1. To sand the surface of the timber before cutting
  2. To pull the timber into the machine and feed it under the cutter block at a controlled rate Correct answer.
  3. To spray oil onto the blades to prevent friction
  4. To push the timber backwards out of the machine

Explanation

The infeed roller has a corrugated surface that grips the rough timber and feeds it steadily into the rotating cutter block. It works in conjunction with the smooth outfeed roller to maintain a constant feed rate.

Question 11Wood behavior, joinery, framing and finishing decisions

What is the name of the active, growing cell layer located directly between the inner bark and the sapwood of a tree trunk?

  1. Medullary rays
  2. Heartwood
  3. Cambium layer Correct answer.
  4. Pith

Explanation

The cambium layer is a thin layer of living cells that produces new wood cells (sapwood) on the inside and new bark cells on the outside, facilitating the radial growth of the tree.

Question 12Wood behavior, joinery, framing and finishing decisions

What is the widely recognized international trade name for the durable Ghanaian timber species known locally as Odum?

  1. Obeche
  2. Iroko Correct answer.
  3. Mahogany
  4. Teak

Explanation

Odum (Milicia excelsa) is traded internationally under the name Iroko. It is a highly valued West African hardwood known for its strength, gold-brown color, and durability.

Question 13Wood behavior, joinery, framing and finishing decisions

What is the international trade name for the soft, lightweight hardwood known as Wawa in Ghana?

  1. Obeche Correct answer.
  2. Sapele
  3. Iroko
  4. Framire

Explanation

Wawa (Triplochiton scleroxylon) is exported under the trade name Obeche (or Ayous). It is a lightweight, pale straw-colored wood that is easy to machine.

Question 14Wood behavior, joinery, framing and finishing decisions

What is the primary objective of seasoning timber before using it to manufacture furniture or structural frames?

  1. To make the wood rot faster
  2. To reduce the moisture content of the wood to match the humidity of its final environment Correct answer.
  3. To increase the weight of the timber boards
  4. To wash out the natural resins and oils

Explanation

Seasoning removes excess moisture (free and bound water) from the wood. This minimizes subsequent shrinkage, swelling, warping, or splitting when the wood is in service, ensuring the stability of joints and shapes.

Question 15Wood behavior, joinery, framing and finishing decisions

What is meant by the term 'Equilibrium Moisture Content' (EMC) in woodworking?

  1. The maximum amount of water a piece of wood can hold when fully submerged
  2. The state where wood is neither gaining nor losing moisture because its moisture level is in balance with the surrounding air humidity and temperature Correct answer.
  3. The point at which wood fibers lose all structural strength
  4. The speed at which moisture evaporates in a kiln

Explanation

Wood is hygroscopic; it absorbs or releases moisture based on the relative humidity of the air. When wood reaches Equilibrium Moisture Content (EMC), its moisture content has stabilized to match the surrounding atmospheric conditions.

Question 16Wood behavior, joinery, framing and finishing decisions

Which seasoning defect is characterized by a curved distortion across the width of a flat-sawn timber board?

  1. Bowing
  2. Twisting
  3. Cupping Correct answer.
  4. Splitting

Explanation

Cupping occurs when the board curls across its width, forming a trough shape. This is caused by uneven shrinkage rates between the outer face (closer to the bark, which shrinks more) and the inner face of a flat-sawn board.

Question 17Wood behavior, joinery, framing and finishing decisions

What is the primary cause of a timber board developing a 'twist' defect during drying?

  1. Using a saw with too many teeth to cut the log
  2. Uneven shrinkage along the length of the board, often due to spiral grain structure in the original log Correct answer.
  3. Storing the wood in a dark room
  4. Applying too much varnish to the ends

Explanation

Twisting is a common seasoning defect where the board warps spirally. It occurs because wood shrinks along the direction of its grain, and logs with spiral or helical grain structures experience diagonal shrinkage forces that pull the board out of flat.

Question 18Wood behavior, joinery, framing and finishing decisions

What is the main advantage of kiln seasoning over natural air seasoning?

  1. It requires no electricity or equipment.
  2. It is much faster and can achieve a precisely controlled, lower moisture content suitable for indoor furniture. Correct answer.
  3. It increases the amount of sap in the wood.
  4. It makes the wood grow new leaves.

Explanation

Controlled kiln drying can be faster and reach specified conditions beyond ordinary air drying, depending on species, dimensions and schedule. It does not guarantee defect-free or perfectly uniform timber. Verify the actual target and evidence rather than equate the method name with acceptance.

Question 19Wood behavior, joinery, framing and finishing decisions

Why is plywood constructed with the wood grain of adjacent veneer layers oriented at 90-degree angles to each other?

  1. To make the plywood look more decorative
  2. To distribute strength in both directions and reduce moisture-related expansion and shrinkage Correct answer.
  3. To allow the plywood to bend into tight circles easily
  4. To reduce the amount of glue required

Explanation

This technique is called cross-banding. Since wood shrinks and expands primarily across its grain, gluing plies at right angles matches the stable longitudinal grain of one ply with the unstable transverse grain of the next, stabilizing the board and providing high structural strength in all directions.

Question 20Wood behavior, joinery, framing and finishing decisions

How is particleboard (chipboard) manufactured?

  1. By slicing thin sheets directly from a log
  2. By mixing wood chips and shavings with a synthetic resin adhesive and pressing them under heat Correct answer.
  3. By weaving wood fibers like fabric
  4. By melting sawdust into a liquid and casting it in molds

Explanation

Particleboard is an engineered wood product made by combining wood chips, shavings, and sawdust with a binder (like urea-formaldehyde resin) and consolidating the mixture under high heat and pressure to form large panels.

Question 21Wood behavior, joinery, framing and finishing decisions

How are trees classified that have broad leaves and produce seeds enclosed within a fruit or nut?

  1. Softwoods
  2. Gymnosperms
  3. Hardwoods (Angiosperms) Correct answer.
  4. Conifers

Explanation

Hardwoods are botanically classified as angiosperms. They are broad-leaved trees (like Odum, Mahogany, and Oak) whose seeds are enclosed within a flower, fruit, or nut shell. Note that botanical hardness does not always correlate with physical density.

Question 22Wood behavior, joinery, framing and finishing decisions

Which botanical group of trees is characterized by having narrow needle-like leaves and naked seeds carried in cones?

  1. Angiosperms
  2. Softwoods (Gymnosperms) Correct answer.
  3. Deciduous hardwoods
  4. Monocotyledons

Explanation

Softwoods belong to the gymnosperm group. They are cone-bearing trees (conifers) that typically retain their needle-like foliage year-round (e.g., Pine, Fir, Cypress).

Question 23Wood behavior, joinery, framing and finishing decisions

How should freshly sawn timber boards be stacked in a seasoning yard to ensure uniform drying and prevent warping?

  1. Stood vertically against a wall in a tight bundle
  2. Piled in a random heap directly on damp ground
  3. Stacked horizontally on level, elevated foundations with thin timber spacers (stickers) aligned vertically between each layer Correct answer.
  4. Weighted down inside a water tank

Explanation

Proper stacking requires raising the stack off the ground to avoid soil moisture. Using 'stickers' (spacers) of uniform thickness placed directly above one another ensures even airflow around all surfaces and distributes weight evenly, keeping the boards flat.

Question 24Wood behavior, joinery, framing and finishing decisions

In roof construction, what is the horizontal timber member laid along the top of walls to distribute roof loads and provide an anchoring point for rafters?

  1. Purlin
  2. Ridge board
  3. Wall plate Correct answer.
  4. Fascia board

Explanation

The wall plate is bedded in mortar or bolted to the top of masonry walls. It provides a level base, distributes structural roof loads evenly, and allows rafters to be birdsmouth-jointed and nailed securely to the structure.

Question 25Wood behavior, joinery, framing and finishing decisions

What is the term for the inclined roof members that run from the wall plate up to the ridge board to form the main slope of a gable roof?

  1. Ceiling joists
  2. Common rafters Correct answer.
  3. Purlins
  4. Tie beams

Explanation

Common rafters are the primary sloping timbers that span from the eaves (wall plate) to the ridge. They support the roof deck, purlins, and cladding materials.

Question 26Wood behavior, joinery, framing and finishing decisions

What is the primary function of the ridge board in a traditional timber roof frame?

  1. To support the weight of the ceiling joists
  2. To act as a non-structural ridge alignment board where the upper ends of opposite rafters meet Correct answer.
  3. To keep water out of the attic
  4. To connect the wall plates together

Explanation

The stated traditional ridge board aligns rafter ends; it is distinct from a designed structural ridge beam carrying relevant roof loads. Actual roof type, ties, supports and load path matter. A label alone does not establish that a real roof has no outward thrust or needs no structural assessment.

Question 27Wood behavior, joinery, framing and finishing decisions

Which structural roof member forms the external sloping intersection where two adjacent sloping roof planes meet?

  1. Valley rafter
  2. Hip rafter Correct answer.
  3. Purlin
  4. Common rafter

Explanation

A hip rafter runs diagonally from the corner of the wall plates up to the ridge board, forming an external ridge (the hip) where two roof slopes meet. Rafters cut to fit against it are called hip jack rafters.

Question 28Wood behavior, joinery, framing and finishing decisions

What is a 'jack rafter' in roof framing?

  1. A mechanical jack used to lift heavy roof trusses into place
  2. Any rafter that does not span the full distance from the wall plate to the ridge board Correct answer.
  3. A rafter made of steel instead of timber
  4. The main vertical support post under the ridge

Explanation

A jack rafter is shorter than the corresponding common-rafter span in the specified roof arrangement, commonly meeting a hip or valley. Exact naming depends on the arrangement; do not assume every arbitrary short member is a rafter or that its description determines capacity.

Question 29Wood behavior, joinery, framing and finishing decisions

In a traditional king post roof truss, what is the primary structural role of the vertical king post?

  1. It supports the ridge board and pushes down on the tie beam.
  2. It acts as a tension member, hanging from the apex to support the center of the horizontal tie beam. Correct answer.
  3. It serves as a decorative column.
  4. It carries the roof sheets directly.

Explanation

Despite its appearance as a column, the king post in a truss is in tension. It is suspended from the apex where the principal rafters meet and holds up the center of the tie beam, preventing it from sagging under ceiling loads.

Question 30Wood behavior, joinery, framing and finishing decisions

What is the function of the horizontal tie beam located at the bottom of a roof truss?

  1. To support the roof ridge and act as a rafter
  2. To connect the rafter feet, preventing them from spreading outward and pushing the walls apart Correct answer.
  3. To hold the vertical purlins in place
  4. To act as a template for cutting shingles

Explanation

The tie beam forms the base of the structural triangle. Under roof load, rafters tend to push outward at their feet. The tie beam resists this outward thrust (tension), keeping the walls stable.

Question 31Wood behavior, joinery, framing and finishing decisions

What is the main function of ceiling joists in residential timber framing?

  1. To carry the ceiling lining and act as ties to resist outward thrust from rafters Correct answer.
  2. To form the waterproof barrier of the roof
  3. To support the fascia boards
  4. To act as braces for concrete columns

Explanation

Ceiling joists run horizontally across the room. They provide a flat framing framework to nail ceiling boards (like plasterboard) and act as ties to secure the lower ends of rafters, preventing them from spreading.

Question 32Wood behavior, joinery, framing and finishing decisions

In temporary formwork for concrete structures, what is the term for the timber boards that come in direct contact with wet concrete?

  1. Yokes
  2. Sheathing (or shutters) Correct answer.
  3. Walers
  4. Sole plates

Explanation

Sheathing or shutters form the face of the mold. They contain the wet concrete and shape its surface. In Ghana, plywood sheets or planed Wawa boards are commonly used for sheathing.

Question 33Wood behavior, joinery, framing and finishing decisions

What is the primary function of 'yokes' in timber formwork built for concrete columns?

  1. To make the concrete dry faster
  2. To resist the high lateral (hydrostatic) pressure exerted by wet concrete, preventing the formwork from bursting open Correct answer.
  3. To support the column vertically
  4. To insulate the concrete from tropical heat

Explanation

Wet concrete acts as a heavy fluid, exerting high lateral pressure at the bottom of forms. Yokes are heavy timber or metal frames clamped horizontally around the column box to reinforce the sheathing against bursting.

Question 34Wood behavior, joinery, framing and finishing decisions

Why is form oil (release agent) applied to the inside faces of timber formwork before pouring concrete?

  1. To strengthen the concrete chemically
  2. To prevent the concrete from bonding to the timber, allowing easy stripping (demolding) of formwork Correct answer.
  3. To keep the timber from getting dusty
  4. To prevent termites from eating the concrete

Explanation

Form oil creates a barrier between the porous timber and the concrete. This prevents the concrete from sticking to the wood fibers, ensuring clean removal (stripping) of the forms without damaging the cured concrete surface or the timber.

Question 35Wood behavior, joinery, framing and finishing decisions

In structural scaffolding, what is the horizontal member that runs parallel to the face of the building to support the transverse boards (transoms)?

  1. Standard
  2. Ledger Correct answer.
  3. Diagonal brace
  4. Sole board

Explanation

Ledgers are horizontal scaffold tubes or timber rails running longitudinally. They connect the vertical standards together and provide intermediate support platforms for transoms.

Question 36Wood behavior, joinery, framing and finishing decisions

What is the purpose of installing diagonal braces on a timber scaffold frame?

  1. To act as handrails for workers
  2. To prevent lateral sway and stabilize the scaffold against wind and working forces Correct answer.
  3. To support the weight of the scaffold boards
  4. To hold tools for the workers

Explanation

Scaffold structures are prone to racking (folding sideways) under wind or moving loads. Diagonal bracing forms triangles within the frame, which are structurally rigid, preventing the scaffold from buckling or swaying.

Question 37Wood behavior, joinery, framing and finishing decisions

What is the term for the vertical structural timber posts used to support beam formwork from the ground?

  1. Props (or shores) Correct answer.
  2. Joists
  3. Rafters
  4. Ledgers

Explanation

Props (shores) are temporary vertical columns that carry the heavy weight of wet concrete and formwork. They transfer the loads down to a solid foundation (usually resting on sole plates to prevent sinking).

Question 38Wood behavior, joinery, framing and finishing decisions

What are the horizontal timber members placed across rafters to provide a direct fixing surface for corrugated metal roofing sheets in Ghana?

  1. Wall plates
  2. Purlins Correct answer.
  3. Fascias
  4. Struts

Explanation

Purlins (often called battens when smaller for tiles) are installed horizontally across the sloping rafters. They provide intermediate support and nail-anchoring points for the roof sheeting.

Question 39Wood behavior, joinery, framing and finishing decisions

In platform-frame wall construction, what is the horizontal timber member nailed to the bottom of the wall studs?

  1. Top plate
  2. Sole plate (or bottom plate) Correct answer.
  3. Nogging
  4. Header

Explanation

The sole plate (bottom plate) rests on the floor platform. The wall studs are nailed vertically to this plate, which anchors the wall assembly to the subfloor.

Question 40Wood behavior, joinery, framing and finishing decisions

What is the structural function of a 'header' (lintel) installed in a timber stud wall frame?

  1. To align the top of the wall studs
  2. To span across openings like windows and doors, transferring vertical loads to the trimmer studs Correct answer.
  3. To carry electrical wiring
  4. To serve as a decorative trim

Explanation

When vertical studs are cut to make an opening for a door or window, the load must bypass the opening. The header is a thick timber beam that spans the opening, redirecting structural weight to the vertical studs at the sides.

Question 41Wood behavior, joinery, framing and finishing decisions

What is the main purpose of installing 'nogging' (also known as dwangs or blocking) between vertical studs in a timber wall frame?

  1. To provide channels for plumbing pipes
  2. To stiffen the wall studs, prevent them from buckling under load, and provide fixing edges for boards Correct answer.
  3. To hold insulation in place
  4. To act as decorative paneling

Explanation

Specified blocking can restrain relevant movement and provide attachment, but the exact function and capacity depend on the actual design. It does not automatically prevent every stud buckling failure or establish a universal spacing. Verify the intended load path and installation detail.

Question 42Wood behavior, joinery, framing and finishing decisions

What is the term for the vertical board fixed to the ends of rafters at the eaves, to which gutters are typically mounted?

  1. Ridge board
  2. Fascia board Correct answer.
  3. Bargeboard
  4. Soffit

Explanation

The fascia board is fixed vertically to the lower ends of the roof rafters. It closes the roof eaves, protects the rafter tails from weather, and serves as a mounting surface for roof gutters.

Question 43Engineering models, drawings, evidence and project decisions

A carpenter needs 15 ceiling joists, each 4 meters long. What is the total linear meters of timber that must be ordered?

  1. 15 meters
  2. 30 meters
  3. 60 meters Correct answer.
  4. 120 meters

Explanation

To find the total linear meters, multiply the number of pieces by the length of each piece: 15 pieces * 4 meters = 60 linear meters.

Question 44Engineering models, drawings, evidence and project decisions

Calculate the board-foot volume of a piece of timber that is 2 inches thick, 8 inches wide, and 12 feet long.

  1. 8 board feet
  2. 12 board feet
  3. 16 board feet Correct answer.
  4. 24 board feet

Explanation

One board foot is defined as a volume of wood equivalent to 1 inch thick, 12 inches wide, and 1 foot long. The formula is: Board Feet = (Thickness in inches * Width in inches * Length in feet) / 12. Applying this: (2 * 8 * 12) / 12 = 16 board feet.

Question 45Engineering models, drawings, evidence and project decisions

A carpenter is building a simple platform deck measuring 3 meters by 4 meters. What is the floor area in square meters?

  1. 7 square meters
  2. 12 square meters Correct answer.
  3. 24 square meters
  4. 36 square meters

Explanation

Area of a rectangle is length multiplied by width: 3 meters * 4 meters = 12 square meters.

Question 46Engineering models, drawings, evidence and project decisions

If local Odum timber costs GHS 120 per linear meter, what is the material cost for 8 posts that are each 3 meters long?

  1. GHS 960
  2. GHS 2,880 Correct answer.
  3. GHS 3,840
  4. GHS 5,760

Explanation

First, find the total linear meters: 8 posts * 3 meters = 24 linear meters. Then, multiply by the unit cost: 24 meters * GHS 120/meter = GHS 2,880.

Question 47Wood behavior, joinery, framing and finishing decisions

Which wood joint is considered the industry standard for securing a table leg to an apron rail due to its high shear strength?

  1. Butt joint
  2. Lap joint
  3. Mortise and tenon joint Correct answer.
  4. Mitred joint

Explanation

The mortise and tenon joint consists of a projecting tongue (tenon) fitting into a corresponding rectangular pocket (mortise). When glued and pinned, it offers high resistance to bending and racking forces.

Question 48Wood behavior, joinery, framing and finishing decisions

What is 'drawboring' in traditional mortise and tenon joinery?

  1. Drilling a large hole to relieve moisture
  2. Drilling offset peg holes in the mortise and tenon so that driving a wood peg pulls the joint tightly together Correct answer.
  3. Boring a hole using a dull drill bit
  4. Drilling holes to allow air circulation

Explanation

Drawboring involves drilling a peg hole through the mortised piece, then marking the tenon, and drilling its hole slightly closer to the shoulder. When a tapered peg is driven through, it forces the tenon deeper, pulling the joint shoulder tight against the mortise face.

Question 49Wood behavior, joinery, framing and finishing decisions

Which woodworking joint features interlocking wedge-shaped fingers (pins and tails) that resist being pulled apart, commonly used in high-quality drawer construction?

  1. Dovetail joint Correct answer.
  2. Bridle joint
  3. Tongue and groove joint
  4. Halving joint

Explanation

Dovetail joints have trapezoidal 'tails' and 'pins' that interlock. The shape of the wedges prevents the joint from being pulled apart in one direction, providing high mechanical strength even without glue.

Question 50Wood behavior, joinery, framing and finishing decisions

What is a 'housing joint' (also known as a dado joint)?

  1. A joint used only to build houses
  2. A square groove cut across the grain of one board to receive the end of another board Correct answer.
  3. A joint made using metal brackets
  4. A method of stacking timber boards for storage

Explanation

A housing joint (dado) is a rectangular channel cut across the wood grain of a panel. The end of a shelf or divider fits into this slot, providing strong shear support for bookshelves and cabinets.