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BTEB Diploma in Textile Engineering Examination study materials
BTEB Diploma in Textile Engineering Examination study resources

BTEB Diploma in Textile Engineering Examination practice questions

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Question 1Textile Raw Materials and Fibre Science

Which natural fibre is obtained from the seed hair of a plant and is composed mainly of cellulose?

  1. Jute
  2. Cotton Correct answer.
  3. Wool
  4. Silk

Explanation

Cotton fibre grows as a single elongated cell attached to the seed of the cotton plant. Its dry composition is about ninety percent cellulose, which makes it a seed-hair cellulose fibre. Jute, wool and silk come from different sources and have different chemical structures.

Question 2Textile Raw Materials and Fibre Science

The unit used to express the linear density of textile fibres in the SI metric system is the:

  1. hank
  2. grain
  3. denier
  4. tex Correct answer.

Explanation

Tex is defined as the mass in grams of one thousand metres of yarn or fibre, and it belongs to the direct metric system. Denier is also a direct system but is based on nine thousand metres. Grain and hank are older units used in specific trades rather than the SI metric expression.

Question 3Textile Raw Materials and Fibre Science

Which property of a textile fibre is described by its ability to absorb moisture from the surrounding air?

  1. Lustre
  2. Tenacity
  3. Crimp
  4. Regain Correct answer.

Explanation

Moisture regain is the percentage of moisture a dry fibre absorbs from standard atmosphere and holds under equilibrium. It reflects the number of accessible hydrophilic groups in the polymer. Tenacity, crimp and lustre describe strength, waviness and light reflection respectively.

Question 4Textile Raw Materials and Fibre Science

Which of the following fibres is a regenerated cellulosic fibre?

  1. Polyester
  2. Viscose rayon Correct answer.
  3. Nylon 6,6
  4. Acrylic

Explanation

Viscose rayon is made by dissolving cellulose pulp and extruding it into filaments, so the polymer backbone remains cellulose but is regenerated. Nylon, polyester and acrylic are fully synthetic polymers built from petrochemical monomers. The distinction lies in whether the starting material is a natural polymer.

Question 5Textile Raw Materials and Fibre Science

The natural colour of raw cotton fibre is best described as:

  1. Deep brown
  2. Creamy white to yellowish Correct answer.
  3. Bright golden yellow
  4. Greyish blue

Explanation

Raw cotton lint ranges from creamy white to a light yellowish tint depending on variety and growing conditions. Some speciality cottons are naturally brown or green, but these are exceptions. The usual commercial grade is off-white rather than a strong colour.

Question 6Textile Raw Materials and Fibre Science

Sericin is the gummy protein that binds the two filaments of a silk cocoon together. Its removal in silk processing is called:

  1. Scouring
  2. Mercerising
  3. Bleaching
  4. Degumming Correct answer.

Explanation

Raw silk contains fibroin filaments coated with sericin, which makes the fibre harsh and stiff. Degumming dissolves the sericin with soap or alkaline solution so that the soft lustrous fibroin is exposed. Scouring removes oils and waxes, bleaching removes colour, and mercerising is an alkali treatment applied to cotton.

Question 7Textile Raw Materials and Fibre Science

Wool fibre has a natural crimp and bulk mainly because of which structural feature?

  1. Flat ribbon-like cross-section
  2. Presence of a thick secondary wall
  3. Hollow lumen running along the fibre
  4. Helical arrangement of cortical cells and bilateral structure Correct answer.

Explanation

Wool has two types of cortical cells arranged on opposite sides of the fibre, and one type tends to absorb moisture and swell more than the other. This bilateral structure, combined with the helical packing of the cells, forces the fibre to bend and crimp. Flat ribbons, thick walls and lumens belong to cotton rather than wool.

Question 8Textile Raw Materials and Fibre Science

A yarn is found to have a linear density of 20 tex. What is its equivalent in decitex?

  1. 2 dtex
  2. 200 dtex Correct answer.
  3. 20 dtex
  4. 2000 dtex

Explanation

One tex equals ten decitex because decitex is the mass in grams of ten thousand metres, ten times the thousand-metre basis of tex. Multiplying 20 tex by ten gives 200 dtex. The conversion is a simple factor of ten, so the other values do not match.

Question 9Textile Raw Materials and Fibre Science

Which of the following best explains why cotton fibre is stronger when wet than when dry?

  1. Water molecules form hydrogen bonds between adjacent cellulose chains Correct answer.
  2. Water removes the lumen and creates a solid structure
  3. Water causes the fibre to shrink and become denser
  4. Water dissolves the waxes and increases surface friction

Explanation

Cellulose chains carry many hydroxyl groups, and water molecules can bridge between them, adding secondary bonding across the amorphous regions. This extra hydrogen bonding raises the load needed to break the fibre, giving cotton about twenty percent higher wet strength. The effect is chemical rather than a friction or shrinkage artefact.

Question 10Textile Raw Materials and Fibre Science

Viscose rayon has a lower wet strength than dry strength because:

  1. The fibre dissolves partially in water at room temperature
  2. Water penetrates the amorphous regions and breaks inter-chain hydrogen bonds Correct answer.
  3. Water increases the crystallinity of the fibre
  4. Water reacts chemically with the cellulose to form a weaker compound

Explanation

Regenerated cellulose has a lower degree of crystallinity and orientation than cotton, so many hydroxyl groups are accessible. Water enters the amorphous regions and disrupts the hydrogen bonds holding chains together, allowing them to slide more easily. This is why viscose loses roughly half its strength when wet.

Question 11Textile Raw Materials and Fibre Science

Which fibre property is measured by the stelometer or Pressley tester?

  1. Fibre length uniformity
  2. Colour grade
  3. Moisture regain
  4. Bundle strength of cotton fibre Correct answer.

Explanation

The stelometer and Pressley instruments clamp a bundle of parallel fibres and record the force needed to break it, giving bundle strength. Fibre length is measured by comb sorter or fibrograph methods, moisture by oven or regain tests, and colour by comparison with grade standards. These instruments therefore address strength rather than the other properties.

Question 12Textile Raw Materials and Fibre Science

The main reason for blending polyester with cotton in a fabric is to:

  1. Increase the moisture regain of the blend above that of pure cotton
  2. Reduce the cost of cotton by replacing it with a cheaper fibre
  3. Combine polyester's durability and quick drying with cotton's moisture absorption and comfort Correct answer.
  4. Make the fabric fully biodegradable

Explanation

Polyester contributes strength, abrasion resistance and rapid drying, while cotton contributes absorbency and a pleasant handle against the skin. A blend aims to balance the weaknesses of each component. It does not raise regain above pure cotton, and adding polyester reduces rather than improves biodegradability.

Question 13Textile Raw Materials and Fibre Science

Mercerisation improves the lustre and tensile strength of cotton because the alkali treatment:

  1. Removes the primary wall completely, leaving only the lumen
  2. Converts cellulose into a regenerated cellulose derivative
  3. Coats the fibre surface with a smooth resin layer
  4. Swells the fibre, relieving internal strains and rounding the cross-section Correct answer.

Explanation

Concentrated sodium hydroxide swells the cotton cell, and the relief of internal strains on washing allows the chains to reorient into a rounder, smoother cross-section. The rounder surface reflects light more evenly, raising lustre, and the improved orientation raises strength. The treatment does not deposit resin, strip the whole primary wall, or regenerate the polymer.

Question 14Textile Raw Materials and Fibre Science

Which of the following is the correct order of cotton fibre development stages from the outermost to the innermost layer?

  1. Primary wall, cuticle, lumen, secondary wall
  2. Secondary wall, lumen, cuticle, primary wall
  3. Cuticle, primary wall, secondary wall, lumen Correct answer.
  4. Lumen, secondary wall, primary wall, cuticle

Explanation

A mature cotton fibre consists of a waxy cuticle on the outside, then the primary wall, then layers of secondary wall deposited inside, and finally the central lumen. This sequence reflects the order in which the layers are laid down during growth. Any other order contradicts the known anatomy.

Question 15Textile Raw Materials and Fibre Science

A fibre sample of 2.5 g oven-dry mass is conditioned and found to weigh 2.75 g. What is the moisture regain of the sample?

  1. 10 percent Correct answer.
  2. 9.1 percent
  3. 25 percent
  4. 1.1 percent

Explanation

Moisture regain is the mass of water expressed as a percentage of the oven-dry mass. The water present is 2.75 minus 2.5, which is 0.25 g, and 0.25 divided by 2.5 gives 0.10, or ten percent. Moisture content would instead use the total conditioned mass as the denominator, giving a different figure.

Question 16Textile Raw Materials and Fibre Science

Which feature distinguishes bast fibres such as jute and flax from seed fibres such as cotton?

  1. Bast fibres are protein fibres from animal hair
  2. Bast fibres are extruded from synthetic polymer
  3. Bast fibres are bundles of cells from the plant stem Correct answer.
  4. Bast fibres are single elongated seed hairs

Explanation

Bast fibres are extracted from the phloem region of the stem, where many long cells are cemented together into technical fibre bundles. Cotton, in contrast, is a single seed-hair cell. Both are cellulose, so the difference is botanical origin and cellular arrangement, not chemical class.

Question 17Textile Raw Materials and Fibre Science

In silk reeling, the purpose of the reeling process is to:

  1. Twist staple silk fibres into a spun yarn
  2. Remove the sericin from the cocoon before unwinding
  3. Dye the raw silk filament before weaving
  4. Unwind filaments from several cocoons and combine them into a single yarn Correct answer.

Explanation

Reeling draws the continuous filament from several softened cocoons and combines them into one uniform raw silk yarn of the required denier. Staple spinning is used for waste silk rather than for reeled filament. Degumming may be done before or after reeling, and dyeing is a later stage.

Question 18Textile Raw Materials and Fibre Science

Which property makes polyester fibre particularly suitable for durable-press garments?

  1. Low resistance to acids and alkalis
  2. High initial modulus and thermoplastic behaviour Correct answer.
  3. High biodegradability in soil
  4. High moisture regain and swelling in water

Explanation

Polyester has a stiff chain structure giving a high initial modulus, so it resists deformation, and being thermoplastic it can be heat-set into a permanent shape. These two features allow creases and pleats to survive repeated washing. High regain, poor chemical resistance and rapid biodegradation would all work against durable-press performance.

Question 19Textile Raw Materials and Fibre Science

The length of a fibre is important in yarn manufacture mainly because:

  1. Longer fibres give more inter-fibre friction and hence stronger, smoother yarns Correct answer.
  2. Longer fibres always produce finer yarn counts regardless of other factors
  3. Fibre length determines the chemical composition of the yarn
  4. Shorter fibres give better spinning performance on all systems

Explanation

Longer fibres present more surface area for contact and overlap within the yarn, so friction between fibres increases and the yarn can carry more load. They also allow fewer projecting ends, giving a smoother yarn. Length does not by itself set the count or the chemical nature of the fibre.

Question 20Textile Raw Materials and Fibre Science

Which of the following fibre identification tests would give a smell of burning hair and a crushable black ash?

  1. Burning test on viscose
  2. Burning test on cotton
  3. Burning test on wool Correct answer.
  4. Burning test on polyester

Explanation

Protein fibres such as wool and silk char to a crushable black bead and release a smell like burning hair or feathers because of their nitrogen and sulphur content. Cellulosic fibres smell of burning paper and leave a soft grey ash, while polyester melts and forms a hard bead. The odour and ash type therefore point to wool.

Question 21Textile Raw Materials and Fibre Science

Two yarns have the same tex value but one is made from finer fibres. Compared with the coarser-fibre yarn, the finer-fibre yarn will generally have:

  1. More fibres in the cross-section and better flexural rigidity for a softer handle Correct answer.
  2. Fewer fibres in the cross-section and a stiffer handle
  3. The same number of fibres and identical properties
  4. A higher linear density at the same tex

Explanation

For a fixed yarn linear density, finer fibres mean more fibres per cross-section, which improves evenness and gives a softer, more pliable yarn. Fibre stiffness falls sharply as diameter decreases, so the finer-fibre yarn bends more easily. The tex value is unchanged by definition, so the count cannot differ.

Question 22Textile Raw Materials and Fibre Science

A cotton fibre has a maturity ratio below the normal range. Which combination of effects is most likely in the resulting yarn?

  1. Greater fibre length and better spinning efficiency
  2. Fewer thick-walled fibres, lower yarn strength and more neps and immature spots Correct answer.
  3. Higher fibre wall thickness and increased yarn tenacity
  4. Improved dye uptake uniformity and higher elongation

Explanation

Immature cotton has thin secondary walls, so the fibre is weak, ribbon-like and prone to entanglement. Such fibres reduce yarn strength and produce neps, uneven dyeing and white specks after dyeing. Thick walls, better uniformity and higher tenacity are features of mature fibre, not immature fibre.

Question 23Textile Raw Materials and Fibre Science

The high tensile strength of nylon 6,6 compared with viscose rayon is best attributed to:

  1. A lower molecular orientation along the fibre axis
  2. Regular hydrogen bonding between amide groups in aligned crystalline regions Correct answer.
  3. A higher degree of polymerisation of glucose units
  4. The presence of a natural wax layer on the filament surface

Explanation

Nylon chains contain amide groups that form regular hydrogen bonds between neighbouring chains, and drawing aligns these chains into crystalline regions. The resulting intermolecular bonding and orientation give high tenacity. Viscose is built from glucose units and has lower orientation and fewer such regular bonds.

Question 24Textile Raw Materials and Fibre Science

In a fibre blend, the property that most directly controls the tendency of the two components to segregate during carding is:

  1. Difference in melting point between the components
  2. Difference in fibre length and linear density between the components Correct answer.
  3. Difference in chemical solubility between the components
  4. Difference in natural colour between the components

Explanation

Fibres that differ greatly in length and fineness behave differently in the carding action, so the shorter or finer component migrates and can separate into bands. Close matching of length and linear density keeps the blend intimate. Melting point, solubility and colour do not govern the mechanical segregation during carding.

Question 25Yarn Manufacturing (Spinning)

Which machine converts opened and cleaned cotton tufts into a continuous sliver in a blow room line?

  1. Scutcher Correct answer.
  2. Carding machine
  3. Comber
  4. Speed frame

Explanation

The scutcher is the final machine of the blow room line; it forms a lap or sliver from the opened and cleaned tufts. Carding, combing and speed frame operations all occur later in the spinning sequence.

Question 26Yarn Manufacturing (Spinning)

In cotton spinning, what is the primary purpose of the carding process?

  1. Blending two different fibre types
  2. Individualising fibres and removing impurities Correct answer.
  3. Doubling slivers to improve evenness
  4. Twisting the fibres into a yarn

Explanation

Carding opens fibre tufts into individual fibres, removes neps and trash, and delivers a carded sliver. Twisting is done at ring spinning, while doubling and blending are separate operations.

Question 27Yarn Manufacturing (Spinning)

Which term describes the number of times a sliver is doubled at a draw frame?

  1. Doubling Correct answer.
  2. Draft
  3. Twist multiplier
  4. Lap weight

Explanation

Doubling refers to the number of slivers fed together into one delivery, which improves evenness by averaging irregularities. Draft is the ratio of input to output linear density and is a separate parameter.

Question 28Yarn Manufacturing (Spinning)

What is the main function of the comber in cotton spinning?

  1. Opening the bale into tufts
  2. Removing short fibres and neps from the sliver Correct answer.
  3. Winding the yarn onto a cone
  4. Increasing the twist of the roving

Explanation

Combing removes short fibres, neps and remaining trash, producing a cleaner and more uniform combed sliver. Bale opening, roving twist and winding are handled by other machines.

Question 29Yarn Manufacturing (Spinning)

Which machine inserts twist into the roving before it reaches the ring frame?

  1. Blow room
  2. Speed frame Correct answer.
  3. Draw frame
  4. Carding machine

Explanation

The speed frame, also called the roving frame, drafts the drawn sliver and inserts a small amount of twist to give the roving strength for handling. The draw frame, card and blow room do not produce a twisted product.

Question 30Yarn Manufacturing (Spinning)

What does the term 'draft' mean in a spinning preparation machine?

  1. The number of fibres in the yarn cross-section
  2. The ratio of input to output linear density Correct answer.
  3. The amount of trash removed
  4. The twist inserted per metre

Explanation

Draft is the ratio of the mass per unit length fed to the mass per unit length delivered, so it quantifies attenuation. Trash removal, fibre count and twist are separate concepts.

Question 31Yarn Manufacturing (Spinning)

Which of the following is a direct measure of yarn linear density in the tex system?

  1. Metres per gram
  2. Grams per 1000 metres Correct answer.
  3. Number of plies
  4. Twist per inch

Explanation

Tex is defined as the mass in grams of 1000 metres of yarn, so it is a direct system. Metres per gram belongs to indirect count systems, while plies and twist are unrelated to linear density.

Question 32Yarn Manufacturing (Spinning)

A card sliver of 4.0 ktex is drafted 100 times at a draw frame. What is the approximate delivery linear density?

  1. 0.4 tex
  2. 4 tex
  3. 400 tex
  4. 40 tex Correct answer.

Explanation

Draft is the ratio of input to output linear density, so output equals input divided by draft: 4000 tex divided by 100 gives 40 tex. This is a straightforward application of the draft definition.

Question 33Yarn Manufacturing (Spinning)

Why is doubling combined with drafting at the draw frame?

  1. To improve sliver evenness by averaging irregularities Correct answer.
  2. To remove short fibres
  3. To increase production speed
  4. To insert twist into the sliver

Explanation

Doubling averages out the irregularities of individual slivers, while drafting attenuates the combined sliver. The combination therefore improves evenness without reducing the average linear density below the intended value. Production speed, short fibre removal and twist insertion are not the purpose.

Question 34Yarn Manufacturing (Spinning)

What is the effect of increasing the card cylinder speed while keeping other settings constant?

  1. Better fibre individualisation and more nep removal Correct answer.
  2. Increased sliver linear density
  3. Elimination of the need for a draw frame
  4. Reduced fibre individualisation

Explanation

A higher cylinder speed increases the relative speed between cylinder and flats, improving fibre individualisation and helping to remove neps. It does not eliminate later processes or change the sliver count directly.

Question 35Yarn Manufacturing (Spinning)

Which parameter most directly controls the amount of twist inserted in ring-spun yarn?

  1. Draft ratio at the draw frame
  2. Lap weight at the scutcher
  3. Spindle speed relative to front roller delivery speed Correct answer.
  4. Card cylinder speed

Explanation

Twist is generated by the ratio of spindle (or traveller) speed to the front roller delivery speed. The other parameters belong to earlier processes and do not set yarn twist.

Question 36Yarn Manufacturing (Spinning)

What is the main reason for using a traveller on a ring spinning frame?

  1. To blend the fibres
  2. To guide the yarn and control twist insertion onto the bobbin Correct answer.
  3. To comb the fibres
  4. To draft the roving

Explanation

The traveller runs on the ring and guides the yarn, its lag behind the spindle speed creating the twist. Drafting occurs at the roller drafting zone, while combing and blending are earlier operations.

Question 37Yarn Manufacturing (Spinning)

A yarn has a count of 20 tex. What is its approximate English cotton count?

  1. About 20 Ne
  2. About 12 Ne
  3. About 59 Ne
  4. About 30 Ne Correct answer.

Explanation

The conversion is Ne = 590.5 divided by tex, so 590.5 divided by 20 gives approximately 29.5, or about 30 Ne. The other values do not match the conversion factor.

Question 38Yarn Manufacturing (Spinning)

Which condition favours the formation of better sliver evenness at a draw frame?

  1. Feeding slivers of very different counts
  2. Matching the fibre length to the roller gauge and using an autoleveller Correct answer.
  3. Increasing the delivery speed without control
  4. Using a very high draft with a single drafting zone

Explanation

Correct roller gauge setting relative to fibre length and autolevelling both reduce periodic and random irregularities. Excessive draft, uncontrolled speed and mismatched feed slivers all worsen evenness.

Question 39Yarn Manufacturing (Spinning)

In a comber, what does the term 'noil' refer to?

  1. The twist inserted in the sliver
  2. The long fibres retained in the combed sliver
  3. The short fibres removed during combing Correct answer.
  4. The lap fed to the comber

Explanation

Noil is the waste removed by the comber, consisting mainly of short fibres and neps. The combed sliver is the retained product, while twist and lap are unrelated to noil.

Question 40Yarn Manufacturing (Spinning)

Why is a higher noil percentage generally associated with a cleaner but more expensive combed yarn?

  1. Twist is increased during combing
  2. The card is bypassed
  3. The yarn count becomes coarser
  4. More short fibres are removed, raising fibre cost per kilogram Correct answer.

Explanation

Removing more short fibres improves yarn quality but discards more material, raising the fibre cost per kilogram of yarn. Twist, carding and yarn count are not directly determined by noil level.

Question 41Yarn Manufacturing (Spinning)

What is the role of the opening roller in rotor spinning?

  1. To individualise fibres from the sliver before they enter the rotor Correct answer.
  2. To twist the yarn
  3. To wind the yarn onto a package
  4. To draft the roving

Explanation

The opening roller combs out individual fibres from the feed sliver so they can be transported into the rotor groove. Twisting occurs in the rotor, winding at the package, and drafting is a separate roller operation.

Question 42Yarn Manufacturing (Spinning)

Which factor most strongly limits the maximum production speed of a ring spinning frame?

  1. The weight of the roving bobbin
  2. The colour of the fibre
  3. Traveller speed and the associated friction and heat Correct answer.
  4. The length of the sliver can

Explanation

Traveller speed is limited by friction and heat generation, which can cause traveller failure and yarn damage. Bobbin weight, fibre colour and can length do not set the fundamental speed limit.

Question 43Yarn Manufacturing (Spinning)

What does the term 'roller setting' mean in a drafting system?

  1. The distance between the centres of adjacent drafting rollers Correct answer.
  2. The speed of the delivery roller
  3. The pressure applied to the top rollers
  4. The diameter of the front roller

Explanation

Roller setting is the centre-to-centre distance between adjacent roller pairs, which must be matched to fibre length. Roller pressure, diameter and delivery speed are separate parameters.

Question 44Yarn Manufacturing (Spinning)

A 30 tex yarn is produced from a 600 tex roving. What is the approximate total draft required?

  1. 200
  2. 20 Correct answer.
  3. 2000
  4. 2

Explanation

Total draft equals feed linear density divided by delivery linear density: 600 tex divided by 30 tex gives 20. The other values are off by factors of ten or more.

Question 45Yarn Manufacturing (Spinning)

In a two-zone drafting system, why is the break draft kept relatively low?

  1. To avoid excessive fibre control loss and irregularity in the back zone Correct answer.
  2. To increase the twist in the sliver
  3. To increase the total draft beyond the machine limit
  4. To eliminate the need for top rollers

Explanation

The break draft only partially orients the fibres for the main draft; if it is too high, fibre control is lost and irregularities increase. It does not extend machine limits, remove rollers or add twist.

Question 46Yarn Manufacturing (Spinning)

Which combination best explains the higher strength of combed yarn compared with carded yarn of the same count?

  1. Higher twist multiplier and larger package size
  2. Fewer short fibres and better fibre alignment Correct answer.
  3. Greater trash content and lower neps
  4. Coarser fibre and lower draft

Explanation

Combing removes short fibres and improves alignment, so more fibres contribute to yarn strength. Twist multiplier, package size, trash content and fibre coarseness are not the primary reasons.

Question 47Yarn Manufacturing (Spinning)

A mill observes periodic thick places in the yarn at intervals equal to the front roller circumference. Which fault is most likely?

  1. Insufficient blow room cleaning
  2. An eccentric or damaged front top roller Correct answer.
  3. Incorrect traveller weight
  4. Wrong spindle tape tension

Explanation

A fault repeating once per front roller revolution indicates an eccentric or damaged front roller, producing a periodic drafting irregularity. Traveller weight, spindle tape tension and blow room cleaning cause different, usually non-periodic, faults.

Question 48Yarn Manufacturing (Spinning)

Why does rotor spinning generally require a higher twist multiplier than ring spinning for the same yarn count?

  1. The feed sliver is always coarser
  2. The rotor cannot rotate fast enough
  3. The opening roller adds twist
  4. The rotor yarn has a different fibre arrangement and needs more twist for equivalent strength Correct answer.

Explanation

Rotor yarn has a different fibre configuration, with more wrapper fibres and less straightening, so a higher twist multiplier is needed to achieve comparable strength. Rotor speed, sliver count and the opening roller do not explain the twist requirement.

Question 49Fabric Manufacturing (Weaving and Knitting)

Which motion of a loom is responsible for separating the warp threads into two sheets to form the shed?

  1. Picking
  2. Shedding Correct answer.
  3. Let-off
  4. Beating-up

Explanation

Shedding is the operation that divides the warp into upper and lower sheets, creating a clear passage called the shed through which the weft is inserted. Without a properly formed shed, the shuttle or weft carrier cannot pass between the threads. Picking and beating-up occur only after the shed is open.

Question 50Fabric Manufacturing (Weaving and Knitting)

In a plain weave, the smallest repeat size in terms of ends and picks is:

  1. 2 ends and 2 picks Correct answer.
  2. 3 ends and 3 picks
  3. 8 ends and 8 picks
  4. 4 ends and 4 picks

Explanation

Plain weave is the simplest interlacing, where each warp end passes alternately over and under each weft pick. This alternating pattern repeats after only two ends and two picks, giving the minimum possible repeat. Larger repeats belong to twill, satin, or other derived structures.