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Assam ASSEB HSLC Wood Craft study materials
Assam ASSEB HSLC Wood Craft study resources

Assam ASSEB HSLC Wood Craft practice questions

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Question 1Wood as a Material: Structure, Species and Properties

In a dicotyledonous hardwood such as sal or teak, which tissue mainly conducts water and dissolved minerals upward through the stem?

  1. Phloem
  2. Cambium
  3. Xylem Correct answer.
  4. Cortex

Explanation

Xylem is the principal water-conducting tissue in woody plants; its vessels and tracheids carry sap from the roots to the leaves. Phloem moves food downward, cambium produces new cells, and cortex is outer storage tissue.

Question 2Wood as a Material: Structure, Species and Properties

The darker, inner wood of a mature tree trunk, which is no longer active in sap conduction and is more resistant to decay, is called:

  1. Earlywood
  2. Pith
  3. Sapwood
  4. Heartwood Correct answer.

Explanation

Heartwood forms as the inner layers of sapwood become blocked with extractives such as resins and tannins, darkening the timber and increasing durability. Sapwood remains light and conducts sap, earlywood is the spring growth band, and pith is the central core.

Question 3Wood as a Material: Structure, Species and Properties

A wood sample shows distinct bands of lighter, wider cells alternating with darker, denser bands. These bands are best described as:

  1. Tyloses
  2. Resin canals
  3. Annual growth rings Correct answer.
  4. Medullary rays

Explanation

Each year a tree adds a ring of growth, with wide thin-walled earlywood formed in spring and narrow thick-walled latewood formed later. The contrast between these bands produces the visible annual rings used to estimate tree age.

Question 4Wood as a Material: Structure, Species and Properties

Which structural feature is typical of softwoods such as pine and deodar but generally absent in hardwoods?

  1. Fibres
  2. Resin canals Correct answer.
  3. Vessels
  4. Tracheids

Explanation

Many softwoods contain resin canals in their wood, whereas hardwoods generally lack true resin canals. Both groups have tracheids and fibres, but vessels are the distinctive hardwood element.

Question 5Wood as a Material: Structure, Species and Properties

Moisture content of timber is usually expressed as a percentage of:

  1. The green weight of the log
  2. The volume of the plank
  3. The oven-dry weight of the wood Correct answer.
  4. The weight of the bark

Explanation

Moisture content is calculated by dividing the mass of water present by the oven-dry mass of the wood and multiplying by 100. Using the dry weight as the base gives a consistent reference for comparing samples.

Question 6Wood as a Material: Structure, Species and Properties

Which of the following is the main reason freshly felled timber is seasoned before use in furniture?

  1. To reduce shrinkage and movement in service Correct answer.
  2. To increase its weight for transport
  3. To darken the colour uniformly
  4. To make it conduct electricity

Explanation

Seasoning lowers the moisture content so that the timber reaches equilibrium with its surroundings and subsequent drying in service causes little shrinkage. This limits warping, splitting, and joint failure in finished work.

Question 7Wood as a Material: Structure, Species and Properties

The term 'grain' in timber refers to:

  1. The percentage of resin present
  2. The colour of the heartwood extractives
  3. The thickness of the bark
  4. The direction of the fibres relative to the axis of the piece Correct answer.

Explanation

Grain describes the alignment of wood fibres along the length of a piece; straight grain runs parallel to the axis, while sloping or spiral grain runs at an angle. Working qualities and strength depend strongly on grain direction.

Question 8Wood as a Material: Structure, Species and Properties

Timber cut so that the growth rings meet the wide face at a steep angle, giving straight lines and less tendency to cup, is described as:

  1. Quarter-sawn Correct answer.
  2. Boxed heart
  3. Flat-sawn
  4. Live sawn

Explanation

Quarter-sawn timber is cut radially so the annual rings meet the face at a high angle, producing straight figure and reducing cupping and movement across the width. Flat-sawn timber shows cathedral figure but moves more.

Question 9Wood as a Material: Structure, Species and Properties

Why does a board cut with the pith running along its centre tend to split during drying?

  1. The pith contains more resin canals
  2. The pith is denser than the surrounding wood
  3. Tangential shrinkage exceeds radial shrinkage around the pith Correct answer.
  4. The pith is always wetter than sapwood

Explanation

Wood shrinks more along the growth rings than across them, so the unequal movement around the pith sets up high stresses. These stresses open a split along the pith line, which is why boxed-heart sections are avoided.

Question 10Wood as a Material: Structure, Species and Properties

A furniture maker needs a local timber that is light, easy to work, and suitable for carved panels. Which species is best known in Assam for these qualities?

  1. Sal
  2. Gamari
  3. Simul Correct answer.
  4. Teak

Explanation

Simul, the Indian silk cotton tree, yields a very light, soft timber that is easy to carve and is widely used for panels and toys. Sal and teak are heavier and more durable, and gamari is used where a medium-weight, workable timber is wanted.

Question 11Wood as a Material: Structure, Species and Properties

Which property of teak explains its wide use for outdoor furniture and boat work?

  1. High water absorption
  2. Very low density
  3. Strong tendency to warp
  4. High natural durability from oily extractives Correct answer.

Explanation

Teak contains oily extractives that repel water and resist fungi and insects, giving it high natural durability outdoors. Its density is moderate to high, and it is dimensionally stable rather than warp-prone.

Question 12Wood as a Material: Structure, Species and Properties

A woodworker notices that a plank has shrunk much more across its width than in its thickness. The best explanation is that:

  1. Shrinkage is equal in all directions
  2. Shrinkage is greatest along the length
  3. Shrinkage is greatest in the tangential direction Correct answer.
  4. Shrinkage depends only on the species colour

Explanation

Wood shrinks most along the growth rings (tangential), less in the radial direction, and least along the grain. In a flat-sawn plank the width follows the tangential direction, so it moves most across the face.

Question 13Wood as a Material: Structure, Species and Properties

Which defect appears as a separation between growth rings caused by stresses during rapid drying?

  1. Shake Correct answer.
  2. Wane
  3. Knot
  4. Stain

Explanation

A shake is a split or separation running between growth rings or along the grain, often opened by drying stresses. Knots are embedded branch bases, wane is missing wood at an edge, and stain is a discolouration.

Question 14Wood as a Material: Structure, Species and Properties

A timber sample has an oven-dry mass of 400 g and contains 80 g of water. Its moisture content is:

  1. 80 percent
  2. 16 percent
  3. 20 percent Correct answer.
  4. 25 percent

Explanation

Moisture content equals water mass divided by oven-dry mass, multiplied by 100, so 80 divided by 400 gives 0.20, or 20 percent. Dividing by total wet mass instead would give a different and incorrect figure.

Question 15Wood as a Material: Structure, Species and Properties

Air seasoning of timber is best described as:

  1. Coating the timber with wax to seal in moisture
  2. Drying the timber in a heated kiln under controlled humidity
  3. Soaking the timber in water before use
  4. Stacking timber with spacers so that air circulates and dries it slowly Correct answer.

Explanation

Air seasoning stacks sawn timber in the open with stickers between layers so that air passes over the surfaces and carries moisture away slowly. It is cheaper than kiln drying but slower and dependent on weather.

Question 16Wood as a Material: Structure, Species and Properties

Which statement about the cell wall of wood is correct?

  1. Lignin is the main source of flexibility and cellulose is the stiffener
  2. The cell wall is composed mainly of water
  3. Hemicellulose forms the outer bark layer
  4. Cellulose microfibrils provide tensile strength within a lignin matrix Correct answer.

Explanation

The wood cell wall is a composite in which long cellulose microfibrils, held in a matrix of hemicellulose and lignin, resist tension while lignin stiffens and binds the structure. This composite arrangement gives timber its strength-to-weight ratio.

Question 17Wood as a Material: Structure, Species and Properties

A cabinet door made of flat-sawn timber is found to have cupped after some months in a humid room. The most likely cause is:

  1. The use of quarter-sawn stock
  2. Attack by powder-post beetles
  3. Excessive grain figure on the face
  4. Unequal moisture movement between the two faces of the board Correct answer.

Explanation

When one face takes up or loses moisture faster than the other, the two faces swell or shrink differently and the board cups. This is common in flat-sawn timber, where the growth-ring orientation encourages unequal movement.

Question 18Wood as a Material: Structure, Species and Properties

Which timber species is a hardwood despite having soft, light wood?

  1. Deodar
  2. Balsa Correct answer.
  3. Fir
  4. Chir pine

Explanation

Balsa is a broad-leaved flowering tree, so botanically it is a hardwood even though its wood is extremely light and soft. Chir pine, deodar, and fir are conifers and therefore softwoods.

Question 19Wood as a Material: Structure, Species and Properties

A craftsman wants a timber for tool handles that will absorb shock without splintering. Which property is most important?

  1. High porosity
  2. Low density
  3. High water absorption
  4. High toughness Correct answer.

Explanation

Toughness is the ability to absorb impact energy without fracture, which is exactly what a handle needs. Porosity and water absorption are unrelated or harmful, and low density usually reduces strength.

Question 20Wood as a Material: Structure, Species and Properties

Which of these is the correct sequence of events when a living tree is converted into seasoned timber?

  1. Felling, conversion, seasoning, surfacing Correct answer.
  2. Seasoning, felling, conversion, surfacing
  3. Felling, seasoning, conversion, surfacing
  4. Conversion, felling, surfacing, seasoning

Explanation

The log is felled, sawn into sections during conversion, dried during seasoning, and only then planed or surfaced to final size. Surfacing before drying would be wasted effort because the timber would move afterwards.

Question 21Wood as a Material: Structure, Species and Properties

Two boards of the same species and size are dried, one slowly and one rapidly. The rapidly dried board is more likely to show:

  1. Higher density
  2. Surface checking and internal stresses Correct answer.
  3. Improved natural durability
  4. Straight grain

Explanation

Rapid drying makes the surface dry and shrink before the core, setting up tension that causes surface checks and case-hardening. Slow drying keeps the moisture gradient gentle and reduces such defects.

Question 22Wood as a Material: Structure, Species and Properties

A sample of wood has a volume of 200 cubic centimetres and an oven-dry mass of 120 grams. Its oven-dry density is:

  1. 1.2 grams per cubic centimetre
  2. 60 grams per cubic centimetre
  3. 0.6 grams per cubic centimetre Correct answer.
  4. 1.67 grams per cubic centimetre

Explanation

Density is mass divided by volume, so 120 grams divided by 200 cubic centimetres gives 0.6 grams per cubic centimetre. This places the sample among the lighter timbers.

Question 23Wood as a Material: Structure, Species and Properties

Why is the tangential shrinkage of wood greater than its radial shrinkage?

  1. The pith pushes outward during drying
  2. Lignin is absent from the radial walls
  3. Latewood bands restrict radial movement more than tangential movement Correct answer.
  4. Vessels run only in the radial direction

Explanation

The alternating earlywood and latewood bands and the radial rays restrain movement in the radial direction more than in the tangential direction. As a result, boards move most across their width, along the rings.

Question 24Wood as a Material: Structure, Species and Properties

A workshop stores planed boards flat on a damp floor and finds their lower faces swollen while the upper faces remain dry. The expected result is:

  1. The boards will become more resistant to decay
  2. The boards will shrink uniformly along the grain
  3. The boards will cup with the concave face upward Correct answer.
  4. The boards will bow upward at the ends

Explanation

The damp lower face absorbs moisture and swells while the drier upper face stays put, so the board cups with the swollen face convex and the concave side upward. Keeping timber clear of damp floors and evenly ventilated prevents this.

Question 25Wood as a Material: Structure, Species and Properties

Which combination best explains why a thin veneer can be bent around a curve while a thick board of the same species cannot?

  1. Thin sections have fewer fibres across the thickness to resist stretching and compression Correct answer.
  2. Thin wood contains no lignin
  3. Bending depends only on the colour of the timber
  4. Veneer has a different cell structure from solid wood

Explanation

Bending strains the outer and inner faces; with a thin section the strain at the surface is small because it lies close to the neutral axis, so fewer fibres are stretched beyond their limit. A thick board develops much larger surface strain and fails.

Question 26Wood as a Material: Structure, Species and Properties

In a cross-section of a hardwood such as sal or teak, water and dissolved minerals are conducted mainly through which structure?

  1. Medullary rays, which run radially from the pith
  2. Vessels, which appear as pores in the cross-section Correct answer.
  3. Tracheids, which form most of the latewood
  4. Resin canals, which appear as pale streaks

Explanation

Hardwoods are distinguished from softwoods by the presence of vessels: open-ended tube elements stacked end to end that carry water and appear as visible pores on a cleanly cut transverse surface. Softwoods lack vessels and rely mainly on tracheids. Resin canals occur in some softwoods and are not the water-conducting tissue of hardwoods.

Question 27Wood as a Material: Structure, Species and Properties

A workshop needs a timber for a mallet head that must resist sudden impact without breaking. Which combination of properties matters most?

  1. High stiffness with low elasticity
  2. High density with a very close, hard grain
  3. High toughness with moderate hardness Correct answer.
  4. Low density with high porosity

Explanation

Toughness is the ability of a wood to absorb shock energy without fracturing, and a mallet head also needs enough hardness to resist denting, so toughness with moderate hardness is the right pair. Very hard, dense timbers resist wear but may be brittle under impact. Low density and high porosity give lightness, not shock resistance, and high stiffness with low elasticity describes a brittle response.

Question 28Wood as a Material: Structure, Species and Properties

A turner selects a piece of wood and finds it has a dull, dead sound when tapped and feels distinctly colder to the touch than a dry offcut of the same species. What is the most reasonable conclusion?

  1. The piece has a high extractive content and will finish poorly
  2. The piece has abnormal grain and should be rejected
  3. The piece has been kiln dried at too high a temperature
  4. The piece is likely to have a high moisture content and needs further drying Correct answer.

Explanation

A dull note on tapping and a cold feel are traditional workshop indicators of wet timber, because water raises the density and conducts heat away from the hand faster. Such stock should be checked with a moisture meter and dried further before gluing or finishing. Neither extractives nor kiln damage nor grain direction produces this combination of signs.

Question 29Wood as a Material: Structure, Species and Properties

Why does a wood sample taken from near the pith differ in density and strength from a sample taken near the bark of the same tree?

  1. The outer wood has more knots, which raises its density
  2. The inner wood is juvenile, with thinner walls and wider growth, so it is weaker and less dense Correct answer.
  3. The outer wood contains more water and is therefore heavier
  4. The inner wood has a higher extractive content and is therefore stronger

Explanation

Wood formed close to the pith is juvenile wood: its cells are shorter, its walls thinner and its growth rings often wider, so it is less dense and weaker than mature wood further out. In many species the outer zone is also darker and denser heartwood, but the key structural reason is the juvenile nature of the inner core. Water content and knots are not consistent explanations across a stem.

Question 30Wood as a Material: Structure, Species and Properties

Two boards of the same species and thickness are planed and left in a room that is dry in winter and humid in summer. Which behaviour is expected over a full year?

  1. The boards will swell in summer and shrink in winter, and the movement will be greatest across the width Correct answer.
  2. The boards will not move at all once the surface has been planed and the pores closed
  3. The boards will expand along the grain more than across it, so the length will change noticeably
  4. The boards will swell in summer and shrink in winter, but the change will be small because planing has sealed the surface

Explanation

Wood is hygroscopic, so it takes up moisture when the air is humid and loses it when the air is dry, and the movement is greatest in the tangential direction and least along the grain. A planed surface does not seal the pores against moisture, so seasonal movement continues. Length change along the grain is very small, and no untreated board is dimensionally inert.

Question 31Tools, Equipment and Their Safe Use

A student in the wood craft workshop needs to mark a line parallel to the edge of a plank before planing. Which tool is designed specifically for this task?

  1. A marking gauge Correct answer.
  2. A mortise chisel
  3. A try square
  4. A spokeshave

Explanation

A marking gauge carries an adjustable stock and a pin or knife that rides along the edge, so the scribed line stays a fixed distance from that edge along the whole length. A try square checks or marks right angles, not parallel offsets, and the chisels and spokeshave are cutting tools rather than marking tools.

Question 32Tools, Equipment and Their Safe Use

Before using a hand saw on a new piece of timber, why should the wood be clamped or held in a bench vice rather than steadied by hand?

  1. To prevent the saw blade from rusting during use
  2. To stop the saw from making any noise
  3. To make the saw teeth cut faster through the grain
  4. To keep the cut line straight and prevent the work from shifting or kicking back Correct answer.

Explanation

Secure holding is a fundamental safety rule: if the workpiece moves during a stroke, the blade can jump out of the kerf, the line wanders, and the hand steadying the wood is exposed to the teeth. Clamping also frees both hands for guiding and starting the cut accurately.

Question 33Tools, Equipment and Their Safe Use

Which personal protective equipment is most important when using a wood-turning lathe?

  1. Impact goggles and a face shield Correct answer.
  2. Open sandals with thick socks
  3. Loose cotton gloves
  4. A long-sleeved loose apron with dangling ties

Explanation

A lathe spins the work at high speed and throws chips, dust and, if a piece fails, large fragments toward the operator, so eye and face protection is the primary safeguard. Loose clothing, gloves and dangling ties can be caught by the rotating work and are specifically forbidden near a lathe.

Question 34Tools, Equipment and Their Safe Use

A chisel is being used to pare a joint. Which practice keeps the cutting edge in good condition?

  1. Striking the handle with a steel hammer
  2. Using the chisel as a lever to lift a nailed board
  3. Storing the chisel loose in a box with other tools
  4. Cutting with the bevel side facing the waste wood and never prying with the blade Correct answer.

Explanation

The bevel faces the waste so the flat back registers on the finished surface and the cut is controlled. A chisel edge is thin hardened steel and is easily chipped by prying, by hammer blows on a wooden handle, or by knocking against other tools in storage.

Question 35Tools, Equipment and Their Safe Use

What is the main purpose of a bench hook when cross-cutting a small board with a tenon saw?

  1. To hold the work against the bench edge and stop it sliding during the cut Correct answer.
  2. To measure the length of the cut
  3. To collect sawdust for disposal
  4. To guide the saw at an exact 45-degree angle

Explanation

A bench hook has a stop that bears against the bench edge and an upper stop that the work is pushed against, so the board is held without a vice while the saw cuts in the gap between the stops. It provides holding, not angle guidance or measurement.

Question 36Tools, Equipment and Their Safe Use

Which tool is used to check whether a planed face is flat along its length and across its width?

  1. A marking knife
  2. A steel rule Correct answer.
  3. A smoothing plane
  4. A try square

Explanation

A steel rule laid on edge along the face, and then across it, reveals hollows and high spots by showing where light passes under it. The other items either mark, check squareness, or cut, and none of them tests flatness directly.

Question 37Tools, Equipment and Their Safe Use

Why must a wood rasp be cleaned with a file card after use on resinous timber?

  1. The card straightens any bent teeth
  2. The card applies a protective oil film to the teeth
  3. Packed chips and resin reduce cutting action and cause the tool to skid Correct answer.
  4. The card sharpens the teeth to a keener edge

Explanation

Resin and compacted swarf clog the teeth so the rasp rubs instead of cutting and can slip sideways off the work. A file card, a stiff brush with short wire bristles, lifts the packed material out of the teeth; it neither sharpens nor straightens them.

Question 38Tools, Equipment and Their Safe Use

A tenon saw is stored on a pegboard in the workshop. Which practice protects the teeth?

  1. Storing it in a drawer with chisels and files
  2. Hanging it by the tip of the blade
  3. Hanging it by the handle with the blade vertical and clear of other tools Correct answer.
  4. Laying it flat under a stack of boards

Explanation

Hanging by the handle keeps the blade vertical and away from contact with other hard objects, so the set and sharpness of the teeth survive. Stacking weight on the blade, hanging by the tip, or mixing it with metal tools all risk bending or dulling the teeth.

Question 39Tools, Equipment and Their Safe Use

A candidate is about to bore a 10 mm hole through a hardwood rail using a hand brace and bit. Which action best prevents the bit from splitting the wood as it breaks through the far side?

  1. Oil the bit heavily just before breakthrough
  2. Reduce feed pressure and speed as the point emerges, or clamp a scrap block behind the work Correct answer.
  3. Increase downward pressure sharply at the moment of breakthrough
  4. Withdraw the bit and finish the hole from the same side with a chisel

Explanation

Splintering happens when the lead screw and cutters burst through unsupported fibres, so slowing the feed or backing the exit face with scrap wood supports them. Extra pressure makes breakout worse, and oil does not change the mechanics of the cut.

Question 40Tools, Equipment and Their Safe Use

A plane iron is being honed on an oilstone. After several strokes the bevel looks rounded rather than flat. What is the most likely cause?

  1. The iron was honed on the bevel side only
  2. The stone was too heavily oiled
  3. The cap iron was left fitted during honing
  4. The iron was rocked instead of being held flat on the stone Correct answer.

Explanation

A flat bevel requires the iron to stay in continuous contact with the stone at a constant angle; rocking lifts and lowers the edge and produces a rounded, convex bevel. Oil quantity and the cap iron do not cause rounding, and honing only the bevel side is normal practice.

Question 41Tools, Equipment and Their Safe Use

Why is a wooden mallet preferred over a steel hammer when setting a chisel in a mortise?

  1. It allows the chisel to be used as a pry bar
  2. It keeps the chisel edge sharp by vibration
  3. It strikes with greater force than a steel hammer
  4. The softer face delivers a firm blow without splitting the chisel handle Correct answer.

Explanation

A mallet face deforms slightly on impact and spreads the load, so the blow is transmitted to the chisel without crushing or splitting the handle. A steel hammer concentrates force and damages the handle, and no mallet makes a chisel suitable for prying.

Question 42Tools, Equipment and Their Safe Use

A worker notices that a chisel handle is loose on the tang and wobbles during use. What is the correct response?

  1. Tap the handle firmly on the bench to reseat it
  2. Hold the handle lower, closer to the blade
  3. Wrap the ferrule with tape and continue
  4. Withdraw the tool from use and have the handle refitted or replaced Correct answer.

Explanation

A loose handle can fly off the tang under a mallet blow and the exposed tang can injure the hand, so the tool must be taken out of service until repaired. Tapping, taping or shifting the grip does not restore a secure connection between handle and tang.

Question 43Tools, Equipment and Their Safe Use

Which instrument would a student use to confirm that two adjacent faces of a prepared block are at exactly 90 degrees?

  1. A sliding bevel
  2. A try square Correct answer.
  3. A coping saw
  4. A mortise gauge

Explanation

A try square has a stock bearing on one face and a blade standing against the other, so any gap or interference reveals error from a right angle. A sliding bevel is adjustable and is used to transfer or set arbitrary angles, not to verify 90 degrees.

Question 44Tools, Equipment and Their Safe Use

Why should the blade of a cabinet scraper be burnished with a hardened rod after filing and honing its edge?

  1. Burnishing turns the sharp edge into a fine burr that does the cutting Correct answer.
  2. Burnishing removes rust from the flat faces
  3. Burnishing flattens the blade so it sits in the holder
  4. Burnishing hardens the steel so it never needs resharpening

Explanation

A scraper cuts with a tiny hook, or burr, drawn on the edge by the burnisher; the burr acts as a very fine cutting edge that takes shavings from difficult grain. Burnishing does not harden the steel permanently, remove rust, or change the flatness of the blade.

Question 45Tools, Equipment and Their Safe Use

A workshop has a circular saw bench with the blade guard removed for a quick job. What should the student do?

  1. Use the saw slowly and keep hands well away from the blade
  2. Refuse to use the machine and report the missing guard to the instructor Correct answer.
  3. Wear extra gloves as a substitute for the guard
  4. Ask a classmate to hold a board over the blade area

Explanation

Guards on woodworking machines are mandatory safeguards; removing one defeats the machine's designed protection and no amount of care substitutes for it. The correct action is to isolate the machine and report the defect so the guard is refitted before use.

Question 46Tools, Equipment and Their Safe Use

Which property makes high-speed steel a suitable material for drill bits used on hardwood?

  1. It is non-magnetic and cannot attract chips
  2. It retains hardness at the elevated temperature produced by drilling Correct answer.
  3. It is softer than mild steel so it wears to fit the hole
  4. It conducts heat away faster than aluminium

Explanation

Friction at the drill point raises temperature, and high-speed steel keeps its hardness and cutting ability when hot, which is why it holds an edge longer than plain carbon steel. Softness, thermal conductivity and magnetism are not the reasons it is chosen.

Question 47Tools, Equipment and Their Safe Use

When using a hand drill with a twist bit on thin sheet material, why is a centre punch used first?

  1. It hardens the surface so the bit cuts faster
  2. It enlarges the hole before drilling
  3. It removes the need to clamp the work
  4. It creates a small depression that stops the bit wandering from the marked point Correct answer.

Explanation

A twist bit on a smooth, thin surface tends to skate before it bites, so a punched dimple gives the point a seat and keeps the hole on location. Punching does not harden the surface, enlarge the hole, or replace clamping.

Question 48Tools, Equipment and Their Safe Use

A plane is being set up for fine finishing cuts. Which adjustment gives a thinner shaving?

  1. Opening the mouth wider by sliding the frog back
  2. Loosening the cap iron screw
  3. Retracting the iron slightly so less of the cutting edge projects through the mouth Correct answer.
  4. Advancing the iron so more of the edge projects

Explanation

Shaving thickness is governed by how far the cutting edge projects beyond the sole, so withdrawing the iron reduces the depth of cut. Advancing the iron does the opposite, mouth width controls chip clearance rather than depth, and a loose cap iron causes chatter and clogging.

Question 49Tools, Equipment and Their Safe Use

Why is a wooden bench vice fitted with wooden jaw liners rather than bare metal jaws?

  1. The liners increase the clamping force of the screw
  2. The liners grip without bruising the workpiece and can be replaced when worn Correct answer.
  3. The liners make the vice close faster
  4. The liners prevent the vice from rusting internally

Explanation

Soft wooden liners conform slightly to the work, spread the clamping pressure and avoid marking finished surfaces, and they are cheap to renew when they become marked or worn. They do not change the mechanical advantage of the screw or its closing speed.

Question 50Tools, Equipment and Their Safe Use

A woodworker is about to sharpen a chisel on a grinding wheel. Which precaution matters most for the tool's edge?

  1. Pressing hard to remove metal quickly
  2. Grinding the bevel on the side of the wheel
  3. Cooling the blade in water frequently to avoid overheating the steel Correct answer.
  4. Holding the blade at a steep angle to the wheel face

Explanation

Grinding generates heat quickly at a thin edge, and overheated steel loses its temper and will no longer hold a sharp edge, so the blade is dipped in water often and ground in light passes. Heavy pressure, side grinding and steep angles all increase heat or damage the wheel.