Linen feels cooler to touch than cotton because

B) Linen is a better conductor of heat than cotton.

Polyester is made by polymerization of

A) Ethylene glycol and terephthalic acid

The function of licker in is

A) T o separate the tufts in the lap into smaller tufts.

The function of doﬀer is

A) T o absorb the carded ﬁbres coming down from the ﬂats on the cylinder wires.

Function of autoleveller on draw frame is

C) T o control short term and medium term variation.

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95 questions with answersFinal answer key(Cat.No.753/2021 )

radesman (Textile Technology) - Technical Education question paper 2023

Date of test: 15-06-2023
Question paper code: 85/2023/OL
Questions: 95
Answer key: Final Answer Key
Exam mode: Online (computer based)

See questions with answers Practise as a mock test

Source: Kerala PSC (keralapsc.gov.in) · official document· Last updated 25 Sept 2026· How we check content

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Answer key (Final Answer Key)Open PDF

All 95 questions with answers

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1.
The ash of cotton after burning will be
Show answer and explanation
Answer: C —
Light feathery grayish
Cellulosic fibres like cotton leave a light feathery grayish ash after burning.
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2.
5% caustic soda at boil dissolves ________ ﬁbre.
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Answer: A —
Wool
Protein fibres like wool are dissolved by boiling 5% caustic soda.
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3.
An example for fruit ﬁbre is
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Answer: B —
Coir ﬁbre
Coir is a fruit fibre obtained from the husk of the coconut.
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4.
Linen feels cooler to touch than cotton because
Show answer and explanation
Answer: B —
Linen is a better conductor of heat than cotton.
Linen has a higher thermal conductivity than cotton, transferring heat away from the skin faster.
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5.
__________ is obtained by the polymerization of caprolactum.
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Answer: D —
Nylon 6
Nylon 6 is synthesized by the ring-opening polymerization of caprolactam.
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6.
The length unit of English cotton system is
Show answer and explanation
Answer: B —
Hank of 840 yards
In the English cotton count system, a hank is defined as 840 yards.
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7.
________ is the expression used to express the irregularity in the material.
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Answer: A —
Coeﬃcient of variation
Coefficient of variation (CV%) is a standard measure of mass irregularity in textile materials.
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8.
What is the length of 2.5 lbs of 30s cotton yarn?
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Answer: D —
75 hanks
Count = Hanks per pound. Total hanks = Count $imes$ Weight in lbs = $30 imes 2.5 = 75$ hanks.
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9.
Polyester is made by polymerization of
Show answer and explanation
Answer: A —
Ethylene glycol and terephthalic acid
Polyester (PET) is produced via the polycondensation of ethylene glycol and terephthalic acid.
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10.
In saw gin the seed cotton is fed to the feed lattice and carried forward to
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Answer: A —
Spiked roller
Seed cotton is fed into the saw gin using a feed lattice which passes it to the spiked roller.
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11.
The ginning percentage is higher with ________ gin.
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Answer: C —
Roller gin
Roller gins generally yield a higher ginning percentage with less fiber damage.
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12.
__________ is an example for hank of sliver.
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Answer: C —
0.15
Card or draw frame sliver is typically measured in very coarse counts like 0.15 hank.
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13.
The cleaning eﬃciency of Crighton and Porcupine beaters with coarse counts is about
Show answer and explanation
Answer: A —
50% to 60%
Crighton and porcupine beaters achieve around 50% to 60% cleaning efficiency for coarse cotton.
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14.
_________ is the disentanglement of compressed ﬁbre packages into single ﬁbres.
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Answer: D —
Opening
Opening refers to the process of loosening and separating compressed fiber tufts.
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15.
The function of licker in is
Show answer and explanation
Answer: A —
T o separate the tufts in the lap into smaller tufts.
The licker-in cylinder opens the lap or tufts into smaller pieces and extracts heavy impurities.
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16.
________ is a disadvantage of chute feed system.
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Answer: B —
Frequent change in mixing
Chute feed systems make frequent changes in cotton mixing difficult compared to lap-fed systems.
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17.
Main carding action takes place between
Show answer and explanation
Answer: C —
Cylinder and ﬂats
The primary carding action occurs between the revolving cylinder and the stationary/revolving flats.
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18.
The process of sharpening the metallic wire on carding machine is known as
Show answer and explanation
Answer: B —
Grinding
Grinding is used to sharpen the tips of metallic wires on carding cylinders and flats.
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19.
The function of doﬀer is
Show answer and explanation
Answer: A —
T o absorb the carded ﬁbres coming down from the ﬂats on the cylinder wires.
The doffer condenses and condenses the web of fibers from the main cylinder.
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20.
Function of autoleveller on draw frame is
Show answer and explanation
Answer: C —
T o control short term and medium term variation.
Autolevellers on draw frames detect variations in sliver thickness and adjust draft to control short- and medium-term weight variations.
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21.
________ drafting system gives more protection against roller slippage in draw frame.
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Answer: A —
4 over 5
A 4-over-5 drafting arrangement provides superior control and prevents roller slippage in high-speed draw frames.
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22.
In a 3 over 5 drafting system the ________ roller is having the largest diameter.
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Answer: A —
Front roller
In draw frame drafting systems, the front roller usually has the largest diameter to handle the highest delivery speed and tension.
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23.
The normal web drafts recommended for cotton counts up to 24s is
Show answer and explanation
Answer: D —
0.96 to 0.97
Web draft values between 0.96 and 0.97 are typically used for coarser counts up to 24s to prevent web stretching.
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24.
Removal of cracks and roughness of the cots surface by grinding the surface of the cot is known as
Show answer and explanation
Answer: A —
Buﬃng
Buffing is the process of restoring the smooth surface of rubber cots by removing cracks and roughness.
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25.
The number of heads on comber machine is
Show answer and explanation
Answer: B —
8
Modern combing machines typically feature 8 heads.
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26.
If no short ﬁbre is removed by combing from the lap the fractionating eﬃciency percentage is
Show answer and explanation
Answer: A —
100
Fractionating efficiency is based on the ideal separation of short fibers, giving 100% when evaluated under standard theoretical conditions of non-removal.
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27.
The reason for higher U% of draw frame sliver is
Show answer and explanation
Answer: D —
Inadequate top roller pressure
Inadequate top roller pressure leads to poor fiber control during drafting, resulting in higher mass unevenness (U%).
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28.
The number of doublings in the draw frame should be
Show answer and explanation
Answer: C —
Equal to draft
To maintain the same count/weight from feed to delivery, the number of doublings on a draw frame is kept equal to the total draft.
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29.
Apron controls _______ ﬁbres while drawing.
Show answer and explanation
Answer: B —
Floating
Apron drafting systems are specifically designed to control floating fibers between the drafting rollers.
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30.
In a Ring spinning, the ratio of the surface speed of the front rollers to that of the back rollers give the amount of:
Show answer and explanation
Answer: D —
Draft
The ratio of front roller speed to back roller speed determines the total draft applied to the roving.
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31.
Which of the following statement is correct about Ring frame?
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Answer: A —
The main object of Ring frame are drafting, twisting and building.
The three core functions of a ring spinning frame are drafting the roving, inserting twist, and building the yarn package.
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32.
The angle of inclination of rolls in the Ring frame is:
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Answer: B —
15° to 45°
The drafting rollers in a ring frame are typically inclined at an angle ranging between 15° and 45°.
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33.
________ is an important factor is determining the yarn tension during twisting phase in Ring Spinning.
Show answer and explanation
Answer: C —
Traveler weight
Traveler weight is the primary factor regulating yarn tension during ring spinning and winding.
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34.
In the ring spinning, the element, which is a small piece of steel wire bent in the form of letter 'C' is called:
Show answer and explanation
Answer: B —
Traveler
The C-shaped steel wire that orbits the ring and guides the yarn onto the bobbin is called the traveler.
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35.
Which type of twist is inserted in yarn, when the spindle rotates clockwise direction?
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Answer: B —
"Z" T wist
A clockwise rotation of the spindle inserts a 'Z' twist into the yarn.
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36.
The multitude of ﬁbre ends and ﬁbre loops protruding from the body of yarn is known as:
Show answer and explanation
Answer: D —
Hairiness
Yarn hairiness is caused by protruding fiber ends and loops extending from the yarn core.
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37.
Name the device used in high speed cone winding machine for reducing the frequency of yarn breakage practical minimum?
Show answer and explanation
Answer: C —
Balloon Breaker
Balloon breakers limit the size of the yarn balloon during unwinding, reducing air resistance and tension peaks that cause breakage.
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38.
Wild yarn defect is caused due to:
Show answer and explanation
Answer: A —
Worn out rotating brush on the traveler
Wild yarn or stray ends wrapping around components can be caused by worn rotating brushes or faulty traveler conditions.
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39.
How many coils are there in one lea of Ne cotton yarn?
Show answer and explanation
Answer: C —
80
One lea of cotton yarn measures 120 yards, wound on a reel of 1.5 yards circumference, resulting in 80 revolutions (coils).
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40.
In a clock measuring device, each small division indicates _________.
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Answer: C —
1 Yard
Standard clock measuring devices on winding machines indicate 1 yard per small division.
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41.
The Pirn winding speed of automatic and fully automatic machine varies from:
Show answer and explanation
Answer: C —
6000 Rmp to 12000 Rpm
Automatic pirn winders typically operate at spindle speeds between 6000 rpm and 12000 rpm.
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42.
Formula for calculating the eﬃciency of warper in high speed warping machine is:
Show answer and explanation
Answer: A —
Actual production per hour/Calculated production per hour × 100%
Efficiency is calculated as the ratio of actual production to theoretical/calculated production expressed as a percentage.
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43.
An example for synthetic Adhesive used in size mixture:
Show answer and explanation
Answer: B —
Poly Acrylic Acid
Polyacrylic acid is widely used as a synthetic sizing adhesive/binder.
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44.
In multi cylinder sizing, yarn to be sized are wound on a given number of back beam is called _________.
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Answer: C —
Sett
The group of back beams combined during multi-cylinder sizing is referred to as a set.
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45.
The number of coils of yarn wound on chase between the nose and shoulder is termed:
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Answer: B —
wind of the pirn
The wind of the pirn defines the number of coils placed on the chase between the nose and shoulder.
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46.
Write the formula for calculating the "length of mark" of slasher sizing machine.
Show answer and explanation
Answer: A —
Product sizes of Driven wheel/Product sizes of Driver wheel × circumference of measuring roller in inch
The length of mark is determined by the ratio of driven to driver wheel products multiplied by the circumference of the measuring roller.
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47.
The defect of sized beam is produced due to unequal distribution of yarn in wraith is known as:
Show answer and explanation
Answer: D —
Ridge beam
Uneven yarn distribution across the comb/wraith creates ridges, forming a ridge beam defect.
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48.
Each square in the point paper indicates _________.
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Answer: B —
Intersection point of an end and pick
In weave design paper, each grid square represents the intersection point of a warp end and a weft pick.
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49.
Which deﬁnes the selection of healds to be raised (or) lowered on each successive insertion of pic of weft?
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Answer: A —
Peg plan
The peg plan (or chain plan) determines the raising and lowering sequence of heald frames for each pick.
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50.
The sequence of diﬀerently interlacing ends numbered in design indicates:
Show answer and explanation
Answer: D —
Drafting order
The drafting order specifies the sequence in which warp ends are drawn through the heald frames based on their interlacing pattern.
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51.
How to ﬁnd the number of treadles required for a weave design?
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Answer: C —
By counting the number of diﬀerently interlacing picks in the design
The number of treadles needed for tappet shedding corresponds to the number of differently interlacing picks in the design repeat.
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52.
Plain woven fabric also known as:
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Answer: A —
T abby
Plain weave is also commonly referred to as tabby weave.
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53.
Which twill is called as "GENOA"?
Show answer and explanation
Answer: C —

Genoa cord is a type of twill weave.
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54.
Which is the most suitable weave for towelling?
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Answer: A —
Honey comb
Honey-comb weave creates pockets that enhance water absorbency, making it ideal for towels.
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55.
How many ends and picks are required for a "DEVON HUCK - A - BACK"?
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Answer: D —
10 × 6
A Devon huck-a-back weave repeat consists of 10 ends and 6 picks.
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56.
Crepe weave also known as _________.
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Answer: B —
oatmeal
Crepe weaves are also known as oatmeal weaves due to their pebbled surface texture.
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57.
Name the weave that produce longitudinal warp line in the cloth with ﬁne sunken lines in between?
Show answer and explanation
Answer: C —
Bed ford cord
Bedford cord weaves produce prominent longitudinal cord lines with fine sunken lines in between.
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58.
Secondary motions of power loom are
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Answer: C —
T ake-up and Let-oﬀ
Take-up and let-off motions are the secondary motions responsible for advancing the woven cloth and feeding warp yarn continuously.
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59.
The heald will remain stationary while the shuttle passes from one shuttle box to other, this is called _________.
Show answer and explanation
Answer: D —
Dwell of tappet
Dwell is the period during which the heald frames remain stationary while the shuttle traverses the shed.
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60.
Shuttle less weaving eliminates
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Answer: A —
Pirn winding
Shuttleless looms feed yarn directly from large packages (cones/cheeses), eliminating the pirn winding process.
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61.
Seven wheel take-up is
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Answer: B —
Positive intermittant take-up
The standard seven-wheel take-up mechanism used in traditional looms is a positive intermittent take-up motion.
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62.
The unequal movement of slay in dual unit of time is
Show answer and explanation
Answer: D —
Eccentricity
Slay eccentricity refers to the non-uniform angular velocity of the crank mechanism causing differing speeds during forward and backward strokes.
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63.
Bottom shaft end wheel of a loom is 80 T eeth, how many teeth are there in the crank shaft end wheel?
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Answer: B —
40
The bottom shaft rotates at half the speed of the crankshaft, meaning the crankshaft gear has half the number of teeth ( $80 / 2 = 40$ ).
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64.
Minimum number of lags required in a Dobby
Show answer and explanation
Answer: C —
8
Dobby shedding mechanisms typically require a minimum chain length of 8 lags.
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65.
Number of jacuard cards in a chain of pattern cards depends on
Show answer and explanation
Answer: B —
Number of picks in the repeat of design
Each card in a Jacquard chain corresponds to one pick of weft in the design repeat.
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66.
Preventing the shuttle ﬂy out, a guard is provided on
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Answer: A —
Reed cap
A shuttle guard is attached to the reed cap to prevent the shuttle from flying out of the loom shed.
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67.
A yarn of 1680 yds weigh 0.5 pounds. What is the count of yarn in English cotton system?
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Answer: D —
4
Count = (Length in yards / 840) / Weight in lbs = $(1680 / 840) / 0.5 = 2 / 0.5 = 4$ .
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68.
Scouring is used to get
Show answer and explanation
Answer: B —
improved and uniform absorbency
Scouring removes natural impurities and waxes from cotton, resulting in improved and uniform absorbency.
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69.
Desizing without chemical is
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Answer: A —
Root steeping
Rot steep desizing relies on natural microorganisms and water without added industrial chemicals.
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70.
Keir is used for
Show answer and explanation
Answer: D —
Scouring
A kier is a large pressure vessel used for alkaline scouring of cotton fabrics and yarns.
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71.
Ecco friendly bleaching is _______
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Answer: C —
Hydrogen peroxide bleaching
Hydrogen peroxide bleaching is considered eco-friendly as it decomposes into water and oxygen without forming harmful chlorinated byproducts.
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72.
Commonly used optical whitening agent
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Answer: D —
Tinopal
Tinopal is a well-known optical brightening agent used to enhance the whiteness of textiles.
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73.
Removal of ________ from the silk is degumming.
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Answer: A —
Sericine
Degumming is the process of removing sericin (silk gum) from raw silk fibers.
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74.
Carbonizing of wool means
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Answer: B —
Removal of vegetable particles
Carbonizing uses acid treatment and heat to destroy and remove vegetable impurities from raw wool.
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75.
The protein present in wool
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Answer: C —
Keratin
Wool is a natural animal fiber consisting primarily of the protein keratin.
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76.
Insoluble dye
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Answer: D —
Vat
Vat dyes are insoluble in water and must be reduced to a soluble leuco form for application.
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77.
Disperse dye
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Answer: A —
Polyester
Disperse dyes are specifically used for dyeing synthetic hydrophobic fibers like polyester.
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78.
Diazotisation
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Answer: C —
Azoic
Diazotization is a key chemical reaction used in the application of azoic dyes on fibers.
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79.
Extension of Hot brand reactive dyes.
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Answer: B —
H and X
Hot brand reactive dyes are generally designated by letters such as H, whereas cold brands use X.
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80.
HTHP machine is used for
Show answer and explanation
Answer: D —
Polyester
High Temperature High Pressure (HTHP) machines are essential for dyeing polyester with disperse dyes without carriers.
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81.
Jigger dyeing machine
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Answer: B —
Cloth
A jigger is a batch dyeing machine specifically designed for open-width woven fabrics.
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82.
Dyeing of Knitted fabrics
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Answer: A —
Winch
Winch dyeing machines are traditionally used for dyeing knitted fabrics in rope form.
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83.
T o get original colour after vat dyeing
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Answer: A —
Oxidation
Following application of the reduced leuco form, oxidation is required to regenerate the insoluble colored pigment on the fiber.
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84.
Trade name of Indian vat dye
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Answer: C —
Novatic
Novatic is a well-known commercial trade name for vat dyes manufactured in India.
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85.
Lissapol PV is a
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Answer: B —
Detergent
Lissapol PV is a synthetic surfactant widely used as a detergent and wetting agent in textile processing.
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86.
T emporary ﬁnish
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Answer: B —
Calendering
Calendering imparts a smooth or lustrous finish that is temporary and can be lost upon washing.
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87.
Glycerine is used as ________ in printing.
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Answer: C —
Hygroscopic agent
Glycerine acts as a hygroscopic agent in printing pastes to prevent premature drying.
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88.
VELAN P F is used for
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Answer: B —
Water proof ﬁnish
Velan PF is a durable water-repellent finishing agent used on textiles.
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89.
Double sided roller printing
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Answer: D —
Duplex printing
Duplex printing is a specialized roller printing method that prints both sides of the fabric simultaneously.
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90.
Sanforisation is
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Answer: A —
Anti shrink ﬁnish
Sanforization is a compressive shrinkage process applied to cotton and cellulosic fabrics to control dimensional stability.
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91.
Which one is the style of printing?
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Answer: B —
Resist
Resist printing is a principal style of textile printing, whereas screen, stencil, and block are application methods.
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92.
T o prevent the action of bacteria and fungus in printing paste
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Answer: D —
Salicylic acid
Salicylic acid is commonly added to printing pastes as a preservative to prevent microbial growth.
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93.
Aerograph printing is a type of,
Show answer and explanation
Answer: D —
Stencil printing
Aerograph printing involves spraying dye through a stencil using compressed air.
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94.
Synthetic stiﬀener
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Answer: A —
Polyvinyl alcohol
Polyvinyl alcohol is widely used as a synthetic stiffening and sizing agent.
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95.
In screen printing, mesh fabric is
Show answer and explanation
Answer: C —
Nylon
Synthetic monofilament fabrics like nylon or polyester are standard materials used for screen printing meshes.
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