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NSSCO Woodwork 6190 practice questions

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Question 1Materials: timber, manufactured boards, adhesives and finishes

Which property makes kiln-dried timber preferable to air-dried timber for interior furniture that must not shrink after assembly?

  1. It retains a higher moisture content so it stays flexible
  2. It is dried to a lower and more uniform moisture content under controlled conditions Correct answer.
  3. It has all its sapwood removed during drying
  4. It develops a natural preservative coating during the kiln cycle

Explanation

A kiln allows temperature, humidity and airflow to be controlled, so the stack reaches a specified moisture content that is lower and more even than timber stacked in open air. Lower, uniform moisture means less subsequent movement and shrinkage in service. Air drying alone typically stops at a higher equilibrium level and varies between boards.

Question 2Materials: timber, manufactured boards, adhesives and finishes

A cabinetmaker needs a board that will not warp badly and that shows an attractive pattern on its face. Which conversion method from the log gives quarter-sawn timber with these characteristics?

  1. Sawing the log into four quarters first, then cutting each quarter at right angles to the growth rings Correct answer.
  2. Sawing the log into a series of parallel planks through and through
  3. Cutting the log into short billets and splitting them along the rays
  4. Slicing the log into thin veneers on a rotary lathe

Explanation

Quarter sawing first divides the log into quarters and then cuts so that the board faces run roughly at right angles to the annual rings. This produces the striped figure and reduces shrinkage across the width, giving more stable boards. Plain through-and-through sawing gives wider boards but more cupping and movement.

Question 3Materials: timber, manufactured boards, adhesives and finishes

Which manufactured board is made from wood strands glued and pressed into a dense sheet and is commonly used for structural sheathing and flooring?

  1. Chipboard
  2. Oriented strand board Correct answer.
  3. Blockboard
  4. Medium density fibreboard

Explanation

Oriented strand board is built from long thin strands laid in crossed layers and pressed with resin, which gives it good structural strength for sheathing and flooring. Medium density fibreboard and chipboard are made from fibres and small chips respectively and are weaker in structural use. Blockboard has a core of solid strips rather than strands.

Question 4Materials: timber, manufactured boards, adhesives and finishes

A woodworker wants to glue two boards edge to edge to make a wider panel and needs a joint line that resists creep under load. Which adhesive type is most suitable?

  1. A solvent-based contact adhesive
  2. A cross-linking polyvinyl acetate adhesive Correct answer.
  3. A starch paste
  4. Animal glue applied hot

Explanation

Cross-linking polyvinyl acetate adhesives set to a rigid, water-resistant bond that resists creep, which suits edge-to-edge panel joints. Hot animal glue is strong but is not water-resistant and softens with heat and moisture. Contact adhesive is designed for instant tack on laminates and is not a structural wood joint adhesive.

Question 5Materials: timber, manufactured boards, adhesives and finishes

Which finish is most appropriate for a school workbench top that must resist knocks and water rings while allowing the timber grain to remain visible?

  1. A polyurethane varnish Correct answer.
  2. Clear cellulose sanding sealer only
  3. A water-based stain
  4. Raw linseed oil

Explanation

Polyurethane varnish forms a tough, water-resistant film that withstands knocks and spills while remaining transparent so the grain shows. Sanding sealer is a soft preparatory coat that offers little protection on its own. Oil and stain do not build a hard protective film.

Question 6Materials: timber, manufactured boards, adhesives and finishes

Why is a hardwood such as meranti described as a hardwood?

  1. Because it is always more difficult to saw and plane
  2. Because its timber is always denser than that of any softwood
  3. Because the tree is an angiosperm whose wood contains vessels Correct answer.
  4. Because it grows only in tropical climates

Explanation

The terms hardwood and softwood describe botanical classification, not physical hardness. Hardwoods come from angiosperms, which have vessel elements in their wood, while softwoods come from conifers. Some softwoods such as yew are physically harder than some light hardwoods.

Question 7Materials: timber, manufactured boards, adhesives and finishes

A veneered panel has been glued with a urea formaldehyde adhesive. Which workshop practice best reduces the risk of the veneer blistering?

  1. Using the minimum pressure so that the glue line stays thick
  2. Applying the adhesive only to the veneer and pressing immediately
  3. Spreading adhesive evenly on both surfaces and applying uniform pressure over the whole area Correct answer.
  4. Warming the veneer strongly before pressing to make it pliable

Explanation

Even adhesive spread on both faces plus uniform pressure excludes air pockets and ensures a thin, continuous glue line, which prevents blisters. Uneven or one-sided spread leaves dry patches where the veneer lifts. Excessive heat can also soften or pre-cure the adhesive.

Question 8Materials: timber, manufactured boards, adhesives and finishes

Which defect in sawn timber appears as a separation between annual rings caused by stresses during drying?

  1. Wane
  2. Blue stain
  3. Knot
  4. Shake Correct answer.

Explanation

Shake is a separation of the wood fibres, often between growth rings, and commonly develops from drying stresses or handling shock. A knot is embedded branch wood, blue stain is fungal discolouration, and wane is missing bark edge on a sawn board. Each of these has a different cause and appearance.

Question 9Materials: timber, manufactured boards, adhesives and finishes

A workshop wishes to reduce the amount of solid timber used in drawer bottoms while keeping the panels flat and light. Which material is best suited to this purpose?

  1. Laminated veneer lumber
  2. Plywood Correct answer.
  3. Solid oak boards
  4. Glulam sections

Explanation

Plywood is a thin sheet material with crossed plies that give it good dimensional stability and strength in a light panel, making it ideal for drawer bottoms. Laminated veneer lumber and glulam are thick structural products, and solid oak is heavier and moves with moisture.

Question 10Materials: timber, manufactured boards, adhesives and finishes

Which statement correctly describes the difference between a stain and a varnish in a finishing schedule?

  1. A stain seals the surface while a varnish only colours it
  2. A stain changes the colour of the timber while a varnish forms a protective film on the surface Correct answer.
  3. A stain and a varnish are both film-forming coatings applied in the same way
  4. A varnish is applied only to hide defects while a stain protects the timber

Explanation

A stain alters the colour of the wood, usually by penetrating the fibres, but it gives little protection. A varnish is a film-forming finish that builds a protective layer against moisture, dirt and abrasion. A complete schedule often uses a stain first and a varnish on top.

Question 11Materials: timber, manufactured boards, adhesives and finishes

A carpenter is gluing a joint that will be exposed to occasional damp conditions outdoors. Which adhesive gives the most durable water-resistant bond?

  1. A resorcinol formaldehyde adhesive Correct answer.
  2. Polyvinyl acetate white glue
  3. Rubber cement
  4. Hide glue

Explanation

Resorcinol formaldehyde is a two-part adhesive that cures to a highly water-resistant thermoset bond suitable for exterior joinery. White PVA and hide glue are not durable in wet conditions, and rubber cement is a temporary contact adhesive. The resorcinol glue line also withstands prolonged damp exposure.

Question 12Materials: timber, manufactured boards, adhesives and finishes

Why is the moisture content of timber important when selecting stock for a piece of furniture that will be used indoors?

  1. Because timber will shrink or swell as it reaches equilibrium with the surrounding air Correct answer.
  2. Because timber with high moisture content is always stronger
  3. Because moisture content determines the colour of the finished timber
  4. Because dry timber cannot be glued successfully

Explanation

Wood is hygroscopic, so it exchanges moisture with the air until it reaches equilibrium. If the stock is drier or wetter than the service environment, the finished piece will shrink or swell and may split or open at joints. Timber should therefore be conditioned close to the expected in-service moisture content.

Question 13Materials: timber, manufactured boards, adhesives and finishes

Which manufactured board has a core of solid timber strips glued edge to edge between two veneer faces?

  1. Blockboard Correct answer.
  2. Plywood
  3. Particleboard
  4. Hardboard

Explanation

Blockboard is made by gluing parallel timber strips into a core and then facing both sides with veneer, giving a light but stiff panel. Hardboard is pressed wood fibre, particleboard is bonded chips, and plywood has crossed veneer plies throughout. Only blockboard has the strip core described.

Question 14Materials: timber, manufactured boards, adhesives and finishes

A woodworker notices that a newly planed board has started to show a raised, fuzzy surface after a humid night. Which explanation is most likely?

  1. The fibres have absorbed moisture and swelled above the planed surface Correct answer.
  2. The board has been attacked by wood-boring insects
  3. The board has been exposed to direct sunlight
  4. The board has been finished with too much sanding sealer

Explanation

Planing cuts fibres and opens the surface, so in humid air the exposed fibres absorb moisture and swell, producing a raised grain. This is a surface effect rather than structural damage. Light sanding after the surface has stabilised removes the fuzz.

Question 15Materials: timber, manufactured boards, adhesives and finishes

What is the main reason for applying a sanding sealer before a final coat of varnish on open-grained timber?

  1. To darken the timber permanently
  2. To fill the open pores and stiffen the fibres so the top coat sits evenly Correct answer.
  3. To remove knots from the surface
  4. To make the timber waterproof without any further coating

Explanation

Sanding sealer is a thinned, fast-drying coating that penetrates open pores and stiffens fibres. It is then sanded back to give a smooth, sealed surface so the final varnish builds evenly without sinking into the grain. It is not a final protective coat and does not alter the wood's colour permanently.

Question 16Materials: timber, manufactured boards, adhesives and finishes

Which of the following is a softwood commonly used in construction because of its straight grain and availability in long lengths?

  1. Scots pine Correct answer.
  2. Mahogany
  3. Teak
  4. Meranti

Explanation

Scots pine is a conifer and therefore a softwood, widely used for construction and joinery because it grows straight and is readily available. Mahogany, teak and meranti are all broadleaved tropical trees and are classed as hardwoods. The distinction is botanical, not a matter of hardness.

Question 17Materials: timber, manufactured boards, adhesives and finishes

A woodworker is choosing between two adhesives for a joint that will be sanded shortly after clamping. Which property most directly determines how soon the joint can be machined?

  1. The smell of the adhesive
  2. The colour of the adhesive
  3. The rate at which the adhesive reaches handling strength Correct answer.
  4. The size of the adhesive container

Explanation

The time taken to reach handling strength governs how long the joint must stay clamped and when it can safely be sanded or machined. Adhesives vary widely, from fast-setting cyanoacrylates to slower two-part systems. Colour and packaging do not affect the working schedule.

Question 18Materials: timber, manufactured boards, adhesives and finishes

Which characteristic of plywood explains why it is more stable in width than a solid board of the same species?

  1. Its plies are arranged with the grain of each layer at right angles to the next Correct answer.
  2. It is always made from softwoods
  3. Its surface is always sealed with varnish at the factory
  4. It contains more moisture than solid timber

Explanation

In plywood the grain direction alternates by roughly ninety degrees from ply to ply. Movement along the grain is small, so the crossed plies restrain each other and the panel changes size much less than solid timber. This cross-lamination is the key to its dimensional stability.

Question 19Materials: timber, manufactured boards, adhesives and finishes

Which defect describes a board whose face has curved across its width so that the edges are no longer in the same plane?

  1. Bow
  2. Cupping Correct answer.
  3. Spring
  4. Twist

Explanation

Cupping is a curvature across the width of a board, usually caused by unequal shrinkage between the faces. Bow is a curve along the length, twist is a spiral distortion along the length, and spring is a lengthwise edge curvature in the plane of the face. Only cupping describes a cross-sectional curve.

Question 20Materials: timber, manufactured boards, adhesives and finishes

A workshop plans to use a two-part formaldehyde-based adhesive. Which precaution is most important for safe use?

  1. Applying the adhesive with bare hands to check the consistency
  2. Adding extra hardener to speed up the cure
  3. Storing the mixed adhesive in an open container
  4. Working in a well-ventilated area and avoiding skin contact Correct answer.

Explanation

Formaldehyde-based adhesives give off harmful vapours and can irritate or sensitise the skin, so good ventilation and gloves are essential. Adding extra hardener upsets the mix ratio and can produce a brittle or incompletely cured joint. Mixed adhesive should not be left open to the air.

Question 21Materials: timber, manufactured boards, adhesives and finishes

Why would a furniture maker choose medium density fibreboard rather than solid timber for a shaped, painted cabinet door?

  1. It has a uniform, fine texture that machines to a smooth profile without grain tear-out Correct answer.
  2. It has a decorative grain that shows through paint
  3. It is stronger than solid timber in bending
  4. It is naturally more resistant to fire than solid timber

Explanation

Medium density fibreboard has a homogeneous fine fibre structure with no grain direction, so it can be routed into shaped profiles and painted without tear-out or grain showing through. Its bending strength is lower than solid timber, and it offers no special fire resistance. The absence of grain is a finishing advantage for painted work.

Question 22Materials: timber, manufactured boards, adhesives and finishes

Which finish would be most suitable for a wooden salad bowl that must be food-safe and resist water without forming a brittle film?

  1. A food-safe oil such as a mineral or tung oil blend Correct answer.
  2. A two-pack polyurethane lacquer
  3. A cellulose sanding sealer
  4. A water-based wood stain

Explanation

A food-safe penetrating oil protects the wood from water and is safe for contact with food, and it does not crack or flake if the bowl is washed. A brittle lacquer film can chip and is unsuitable for a working bowl. Sanding sealer and stain are not protective food-contact finishes.

Question 23Materials: timber, manufactured boards, adhesives and finishes

Which statement about the sapwood and heartwood of a tree is correct?

  1. Heartwood is always softer than sapwood
  2. Sapwood is the living outer wood that conducts sap, while heartwood is the darker inner wood that no longer conducts Correct answer.
  3. Sapwood is the dead inner wood and heartwood is the living outer ring
  4. Sapwood and heartwood are identical in colour and durability

Explanation

Sapwood lies just under the bark, is living and conducts water and nutrients, and is usually paler and less durable. Heartwood is the older inner wood that has stopped conducting and often becomes darker and more durable through extractive deposits. The two zones differ in both function and properties.

Question 24Materials: timber, manufactured boards, adhesives and finishes

A cabinetmaker is matching a finish to a timber that will be handled frequently, such as a chair arm. Which combination gives the best balance of durability and easy repair?

  1. A penetrating oil that can be refreshed locally without stripping Correct answer.
  2. A water-based stain with no top coat
  3. A thick polyester resin coating
  4. A single coat of sanding sealer

Explanation

A penetrating oil soaks into the surface and can be renewed on worn areas without stripping the whole piece, which suits frequently handled parts. Thick polyester is hard but difficult to repair locally, and a sealer or stain alone gives no wear protection. Ease of repair is a practical finishing consideration.

Question 25Materials: timber, manufactured boards, adhesives and finishes

Which adhesive is a one-part moisture-curing type commonly used for rapid assembly of small joints in the workshop?

  1. Polyurethane adhesive Correct answer.
  2. Urea formaldehyde adhesive
  3. Casein glue
  4. Contact adhesive

Explanation

One-part polyurethane adhesives cure by reacting with moisture from the air and the wood surface, giving a strong bond and a working time that suits small assemblies. Urea formaldehyde is a two-part system, casein is a powder glue mixed with water, and contact adhesive requires immediate joining of dry films. The moisture-curing mechanism is the distinguishing feature.

Question 26Materials: timber, manufactured boards, adhesives and finishes

Which property of heartwood makes it generally more suitable than sapwood for exterior joinery?

  1. It is always lighter in colour and easier to sand
  2. It has a higher moisture content when freshly sawn
  3. It contains extractives that make it more durable and resistant to decay Correct answer.
  4. It conducts sap more freely through its vessels

Explanation

Heartwood is the inner, older wood of the tree; as cells die, extractives such as resins, tannins and oils are deposited in them, which greatly reduces susceptibility to fungal decay and insect attack. Sapwood is the living, sap-conducting outer layer, so it is usually wetter, paler and much less durable. This is why durable species are specified by heartwood content for exterior work.

Question 27Materials: timber, manufactured boards, adhesives and finishes

A cabinetmaker needs a flat panel for a large wardrobe back where cost and stability matter more than strength or a decorative face. Which manufactured board is the most economical choice?

  1. Blockboard
  2. Plywood
  3. Medium density fibreboard
  4. Hardboard Correct answer.

Explanation

Hardboard is made by wet-processing wood fibres into a dense sheet under heat and pressure; it is cheap, thin and dimensionally stable, and is widely used for backs and drawer bottoms where appearance and structural strength are not critical. Plywood and blockboard cost more because of their veneers and cores, and MDF is denser and dearer than hardboard for the same thin panel.

Question 28Materials: timber, manufactured boards, adhesives and finishes

A workshop is gluing up an internal table frame with a PVA adhesive in an unheated room at about 8 degrees Celsius. Why is this a problem?

  1. PVA becomes waterproof when it is cold and cannot be sanded
  2. PVA sets too quickly in the cold and traps air bubbles
  3. PVA reacts with cold air to release formaldehyde vapour
  4. PVA needs a minimum working temperature to form a proper bond, so the joint may fail or creep Correct answer.

Explanation

Polyvinyl acetate adhesives cure by loss of water and coalescence of the polymer, and this process is very slow or incomplete below roughly 10 degrees Celsius. The result is a weak, chalky glue line that may creep under load. The workshop should warm the room or use an adhesive suited to low temperature.

Question 29Materials: timber, manufactured boards, adhesives and finishes

A finish is described as having a high solids content. What does this mean for the person applying it?

  1. Each coat leaves more film-forming material, so fewer coats may be needed to build a protective layer Correct answer.
  2. The liquid contains more solvent and therefore flows out into a thinner film
  3. The finish dries only by chemical reaction and never by solvent loss
  4. The finish must be thinned before use because it cannot be brushed

Explanation

Solids content is the proportion of a finish that remains as film after the solvent or water has evaporated. A high-solids product deposits more material per coat, giving faster film build and often better protection with fewer applications, although it may be thicker to brush. Solvent content and solids content are complementary, not the same thing.

Question 30Materials: timber, manufactured boards, adhesives and finishes

A veneered table top is being laid with a cross-banded construction on a particleboard core. Which combination of core and balancing veneer will best keep the top flat over time?

  1. A thicker, heavier veneer on the underside to weight the panel down
  2. A veneer of similar thickness and absorption on the underside, so both faces respond equally to moisture Correct answer.
  3. A coat of varnish on the underside only, leaving the top face raw
  4. No veneer on the underside, so the core can dry out freely from below

Explanation

A veneered panel behaves like a balanced laminate: if one face absorbs or loses moisture differently from the other, the two faces swell or shrink unequally and the panel cups. Applying a balancing veneer of similar thickness and species on the reverse face equalises the movement. Sealing both faces also helps, but a one-sided skin or one-sided finish creates the imbalance that causes warping.

Question 31Hand tools and portable power tools: use, maintenance and safety

A learner is about to cut a tenon on a piece of hardwood using a tenon saw. Which safety precaution is most important before the first stroke is made?

  1. Clamp the workpiece firmly so it cannot move during the cut Correct answer.
  2. Hold the workpiece steady with the free hand instead of clamping it
  3. Remove the bench hook so the saw has more room to travel
  4. Start the cut with the saw tilted at a steep angle to bite quickly

Explanation

A tenon saw cuts on the push stroke and will grab and jump if the timber shifts, so the workpiece must be secured with a vice or clamp before cutting begins. Holding timber by hand gives no reliable resistance and puts the fingers in the saw's path. A steep starting angle causes the teeth to catch rather than track a line.

Question 32Hand tools and portable power tools: use, maintenance and safety

Which maintenance routine keeps a bench plane sole flat and the cutter performing correctly over a long period?

  1. Wipe the sole dry, sharpen the cutter when blunt, and store the plane on its side Correct answer.
  2. Leave shavings in the mouth to cushion the cutter during storage
  3. Oil the sole heavily after every session and store it face down
  4. Grind the sole on a belt sander each time the cutter is sharpened

Explanation

A plane works accurately only when the sole is clean and true and the cutter is sharp, so routine care means cleaning off resin and dust, honing the cutter, and resting the plane on its side so the blade is not damaged. Excessive oil attracts grit that wears the sole. Shavings left in the mouth jam the cutting action. Sanding the sole removes metal unevenly.

Question 33Hand tools and portable power tools: use, maintenance and safety

When using a portable circular saw, what is the correct procedure for the guard during a normal straight cut?

  1. Tie the lower guard back so it cannot foul the timber
  2. Hold the lower guard up with the free hand while cutting
  3. Remove the lower guard and rely on careful hand placement
  4. Let the lower guard retract automatically as the saw enters the wood Correct answer.

Explanation

The spring-loaded lower guard is designed to retract as the saw is fed into the workpiece and to spring back over the blade as the saw is withdrawn. It must never be tied back, removed, or held by hand, because then the exposed blade can contact the operator or snag clothing. The automatic action is the safety feature.

Question 34Hand tools and portable power tools: use, maintenance and safety

Which tool is the correct choice for cutting a smooth curve in a 6 mm plywood panel when the curve must be finished accurately?

  1. Rip saw
  2. Mortise chisel
  3. Coping saw Correct answer.
  4. Marking gauge

Explanation

A coping saw has a thin, narrow blade held in a deep frame, allowing it to turn tightly within a curved layout line in thin sheet material. A rip saw is designed for straight cuts along the grain. A mortise chisel removes waste from rectangular joints. A marking gauge scores parallel lines rather than cutting curves.

Question 35Hand tools and portable power tools: use, maintenance and safety

Why should a wood chisel never be used to lever open a paint tin or prise apart nailed timber?

  1. The chisel will cut too quickly and spoil the timber
  2. The handle will absorb too much paint and swell
  3. The bevel angle changes automatically under load
  4. The brittle cutting edge can chip or bend under sideways loading Correct answer.

Explanation

A chisel edge is hardened and honed for paring wood along its length; side or levering loads concentrate force on a thin brittle edge and cause chipping or bending. A chisel is not a pry bar. Paint contamination is a nuisance but not the reason. Edge geometry does not self-adjust.

Question 36Hand tools and portable power tools: use, maintenance and safety

What is the main purpose of the riving knife on a portable circular saw?

  1. To sharpen the blade teeth as they pass through the timber
  2. To measure the depth of cut before sawing
  3. To keep the kerf open behind the blade and reduce the risk of kickback Correct answer.
  4. To hold the workpiece down against the bench top

Explanation

The riving knife sits behind the blade and is slightly thinner than the kerf, so it keeps the cut from closing on the blade. If the kerf closes, the rising teeth can lift the saw and cause kickback. It does not sharpen teeth, clamp the work, or measure depth.

Question 37Hand tools and portable power tools: use, maintenance and safety

A woodworker needs to bore a 25 mm diameter hole through a hardwood rail for a bolt. Which portable tool and bit combination is most suitable?

  1. Hand drill with a brad-point bit
  2. Electric drill with an auger or Forstner bit Correct answer.
  3. Screwdriver with a countersink bit
  4. Bradawl and mallet

Explanation

A hole of 25 mm in hardwood needs power and a bit designed to clear chips, so an electric drill with an auger bit for deep boring or a Forstner bit for a clean flat-bottomed hole is appropriate. A hand drill lacks torque at that diameter. A bradawl makes pilot holes only. A screwdriver cannot bore.

Question 38Hand tools and portable power tools: use, maintenance and safety

Which practice best protects the teeth of a hand saw when it is placed in a tool cupboard?

  1. Store it inside a damp cloth to prevent rust
  2. Stack it under heavier tools to save shelf space
  3. Coat the teeth with grease and lay it flat on the bench
  4. Hang it by the handle with the blade covered by a guard or folded paper Correct answer.

Explanation

Saw teeth are fine and easily dulled by contact with other metal or hard objects, so the blade should be protected by a guard and hung or set aside so the teeth touch nothing. Stacking under heavy tools damages the set. Grease on teeth is unnecessary and messy. A damp cloth promotes rust.

Question 39Hand tools and portable power tools: use, maintenance and safety

A portable power planer is being used to reduce the thickness of a door edge. Which combination of actions best reduces the risk of kickback and poor finish?

  1. Take deep cuts in one pass and feed against the cutter rotation
  2. Start the cut with the rear shoe lifted off the timber
  3. Remove the dust extraction and feed as fast as possible
  4. Take shallow passes, feed with the cutter rotation, and support the work firmly Correct answer.

Explanation

A power planer cuts safely and cleanly when shallow passes are taken and the tool is fed in the direction the cutters rotate, with the work securely supported so it cannot shift. Deep single passes overload the motor and increase kickback. Removing extraction clogs the chips. Lifting the rear shoe misaligns the depth setting and causes a step.

Question 40Hand tools and portable power tools: use, maintenance and safety

Why is a router bit with a bearing guide preferred when trimming a laminate edge flush with a substrate?

  1. The bearing reduces the motor speed to a safer level
  2. The bearing allows the bit to cut without the router being switched on
  3. The bearing sharpens the cutter as it rotates
  4. The bearing follows the substrate edge and controls depth of cut automatically Correct answer.

Explanation

A bearing-guided bit uses the bearing as a depth stop running against the substrate, so the cutter trims the overhanging laminate exactly flush regardless of small variations in the edge. The bearing does not sharpen, change motor speed, or allow cutting without power.

Question 41Hand tools and portable power tools: use, maintenance and safety

When sharpening a bevel-edge chisel on an oilstone, which action produces a correct, repeatable edge?

  1. Sharpen only the flat back and leave the bevel untouched
  2. Press hard on one corner of the blade to speed up metal removal
  3. Hold the bevel flat on the stone and maintain the honing angle throughout the stroke Correct answer.
  4. Rock the blade through a wide arc to round the bevel

Explanation

A consistent honing angle is what produces a flat, keen bevel; the bevel is laid flat on the stone and the angle maintained through each stroke, then the back is flattened on the stone to remove the burr. Rocking rounds the bevel. Working only the back never restores the cutting angle. Concentrated pressure on a corner creates an uneven edge.

Question 42Hand tools and portable power tools: use, maintenance and safety

A jigsaw blade is being selected to cut a tight internal curve in 18 mm hardwood. Which blade feature matters most?

  1. A narrow blade with fine teeth suitable for hardwood Correct answer.
  2. A long blade designed for metal cutting
  3. A blade with no set to the teeth
  4. A wide blade with coarse teeth for fast straight cutting

Explanation

A narrow blade allows the jigsaw to turn within a small radius, while fine teeth suited to hardwood give a cleaner cut and reduce splintering. Wide coarse blades resist turning and cause the blade to bind. A blade with no set cannot clear the kerf. A metal-cutting blade has the wrong tooth geometry for timber.

Question 43Hand tools and portable power tools: use, maintenance and safety

What is the correct way to check and adjust the depth of cut on a portable circular saw before cutting 18 mm board?

  1. Set the blade flush with the top surface of the board
  2. Set the blade so about one full tooth protrudes below the underside of the board Correct answer.
  3. Set the blade so it protrudes 30 mm below the board for clearance
  4. Set the blade so half its diameter protrudes below the board

Explanation

The blade should protrude just enough that about one tooth clears the underside of the work; this minimises the exposed blade and reduces the chance of the teeth catching on the bench or on offcuts. Excessive protrusion increases injury risk and tear-out. A blade flush with the top cannot cut through.

Question 44Hand tools and portable power tools: use, maintenance and safety

Which sequence correctly describes fitting a bit into a portable router collet?

  1. Tighten the collet nut with pliers while the router is running
  2. Oil the bit shank heavily before inserting it into the collet
  3. Insert the bit fully to the bottom of the collet, then tighten the nut by hand only
  4. Insert the bit to the marked depth, tighten the collet nut firmly with the correct spanner, then check it is secure Correct answer.

Explanation

The bit shank is inserted to its marked depth and the collet nut tightened firmly with the correct spanner so the collet grips the shank evenly. Bottoming the bit prevents the collet gripping and hand tightening is insufficient. Pliers damage the nut and the router must be unplugged. Oil on the shank lets the bit slip.

Question 45Hand tools and portable power tools: use, maintenance and safety

A cabinet scraper is being prepared for use. What does correct preparation involve?

  1. Coating the edge with wax to reduce friction
  2. Leaving the milled edge from the factory untouched
  3. Grinding the edge to a sharp point on a bench grinder
  4. Filing the edge square, honing it smooth, then turning a fine burr with a burnisher Correct answer.

Explanation

A scraper cuts with a fine burr turned along a truly square, polished edge; the edge is filed square, honed flat on the stone, and the burr is then rolled over with a burnisher. Grinding to a point removes the burr geometry. The factory edge must be prepared. Wax does not create a cutting edge.

Question 46Hand tools and portable power tools: use, maintenance and safety

Which factor most directly explains why a blunt drill bit overheats and smokes when boring hardwood?

  1. The timber has too low a moisture content for drilling
  2. The bit has too many flutes for hardwood
  3. The drill chuck is rotating in the wrong direction
  4. Increased friction and pressure are needed, generating heat instead of cutting Correct answer.

Explanation

A blunt bit rubs rather than cuts, so the operator applies more pressure and friction rises, producing heat and smoke while the hole quality falls. Chuck direction affects whether cutting occurs at all, but a correctly rotating blunt bit still overheats. Moisture content and flute count are secondary to edge sharpness.

Question 47Hand tools and portable power tools: use, maintenance and safety

A sliding compound mitre saw is used to crosscut a wide board. Which practice is correct?

  1. Let the blade reach full speed, then push the head down and away through the timber Correct answer.
  2. Lock the blade guard open to improve visibility
  3. Pull the saw head towards the operator before switching on, then push through the cut
  4. Hold the board with the free hand close to the blade line

Explanation

The blade must reach full speed before contacting the timber, and the head is then moved down and away from the operator so the cut is made on a controlled stroke. Pulling the head towards the operator before starting invites the blade to climb. Hands must stay clear of the blade line. The guard must operate freely.

Question 48Hand tools and portable power tools: use, maintenance and safety

Why must the blade of a portable power tool be allowed to stop completely before the tool is put down?

  1. The blade will lose its set if it cools while rotating
  2. The guard will not close until the tool is at rest
  3. A coasting blade can contact the bench, the workpiece, or the operator and cause injury Correct answer.
  4. The motor will burn out if it is set down while spinning

Explanation

A blade continues to spin after the trigger is released, and a moving blade set down on a bench can snag, climb, or throw the tool. Waiting for it to stop is a basic control measure. Motors are not damaged by being set down. Blade set is not affected by cooling in this way. The guard closes as the blade stops, not because of the tool being at rest.

Question 49Hand tools and portable power tools: use, maintenance and safety

A woodworker is planing a board and the plane keeps chattering and producing a ridged surface. Which is the most likely cause?

  1. The cutter is blunt or set too deep, or the sole is not flat Correct answer.
  2. The board is too short to plane
  3. The plane is being pushed with the grain
  4. The cutter is sharp and set for a fine shaving

Explanation

Chatter and ridged surfaces come from a cutter that is dull or projecting too far, or from a sole that is not true so the plane rocks. Sharpening and reducing the depth of cut, and checking the sole, correct the problem. Board length and working with the grain are normal conditions.

Question 50Hand tools and portable power tools: use, maintenance and safety

Which statement correctly describes the safe use of a hand-held belt sander on a vertical panel?

  1. Keep the sander moving, use light pressure, and secure the panel Correct answer.
  2. Tilt the sander on its edge to reach corners at full speed
  3. Apply heavy pressure in one spot until the surface is level
  4. Sand against the rotation of the belt for a smoother finish

Explanation

A belt sander removes material quickly, so it must be kept moving with light even pressure to avoid gouging, and the panel must be secured so it cannot move. Heavy pressure in one place cuts a hollow. Tilting on edge digs a groove. Sanding against the belt rotation gives a rougher, less controlled finish.