GATE Paper 2012

GATE Paper - 2012

Q. 1 - Q.25 carry one mark each

Q.1 The fibre which has a mineral origin is

(A) Asbestos
(B) Silk
(C) Flax
(D) Acrylic                                                Answer (A)


Q.2 The chemical that is used to convert soda cellulose to sodium cellulose xanthate in the manufacture of viscose rayon is 

(A) Carbon Disulphide 
(B) Sodium Xanthate
(C)Sodium Sulphide
(D)Sodium Hydroxide                                Answer (A)

Q.3 The fibre that will float on water is 

(A) Nylon
(B) Polyester
(C) Acrylic
(D) Polypropylene                  Answer (D)

Q.4 The range of spinning speed (m/min) used in the manufacture of partially oriented polyester yarn is 

(A) 1000-1200
(B) 2000-2500
(C) 2800-3500
(D)4000-6000                               Answer (C)

Q.5 Drawing of synthetic filament does not lead to an increase in

(A) Crystallinity
(B) Tenacity
(C) Tensile Modulus
(D) Elongation at break                Answer (D)

Q. 6 In a card, the wire point density is maximum on

(A)Cylinder
(B) Flat
(C) Doffer
(D) Licker - in                Answer (A)

Q. 7 The spinning system that does not generate false twist during spinning is

(A)Ring Spinning
(B) DRAF-3
(C)Roto Spinning
(D) Air Jet Spinning                Answer (A)

Q.8 Most of the seed coat particals are removed in 

(A) Blow Room
(B) Card
(C) Comber
(D) Draw Frame                Answer (B)

Q.9 An eccentric top roller in a drafting system leads to

(A) Change in draft with oscillation of the line
(B) Change in the draft without oscillation of nip line
(C) Neither change in draft nor oscillation of nip line
(D) Oscillation of nip line only                                   Answer (D)

Q.10 The increase in traveller weight leads to an increase in

(A) Yarn Twist
(B) Traveller Lag
(C) Balloon Diameter
(D) Yarn Tension                    Answer (D)

Q.11 Dog knot is preferred to weaver's knot during creeling because it is 

(A) Easier to make
(B) Stronger
(C) Small in Size
(D) Less prone to slippage                Answer (A)

Q.12 Size add-on does not depend on

(A) Roller Hardness
(B) Drying cylinder temperature
(C) Size paste concentration
(D) Machine Speed               Answer (B)

Q.13 Ball warping is mainly used in the manufacture of 

(A) Terry Towel
(B) Narrow Fabric
(C) Denim
(D) 3D Fabric                Answer (C)

Q.14 The factor that does not influence the propelling force for moving the weft yarn on air jet loom is 

(A) Coefficient of friction between air and yarn
(B) Air velocity
(C) Yarn Strength
(D) Yarn Diameter               Answer (C)

Q.15 In the context of thermal bonding of non-woven web, the statement which is not true is 

(A) A thermoplastic component has to be present in the web
(B) Heat is applied until the thermoplastic component melts
(C) The polymer flows by surface tension and capillary action to fibre cross over points
(D) Chemical reaction takes place                       Answer (D)

Q.16 A 51 mm long fibre has 6% crimp. The crimped length of the fibre in mm is approximately

(A) 44
(B) 46
(C) 48
(D) 50                          Answer (C)

Q.17 On a mass based evenness tester, thin place in a yarn at -40% setting is counted if mass per unit length is

(A) 40% of the mean mass per unit length
(B) 60% of the mean mass per unit length
(C) 40% of the mean mass per unit length or less
(D) 60% of the mean mass per unit length or less               Answer (D)

Q.18 Ratio of grab strength to strip strength is the highest when fabric extension (%) is 

(A) 0
(B) 5
(C) 10
(D) 15                     Answer (D)

Q. 19 Bursting strength of a woven fabric with the same warp and weft yarns is the highest when the ratio ends/cm and pics/cm is 

(A) 1.1
(B) 1.0
(C) 0.9
(D) 0.8               Answer (B)

Q.20 Fabric abrasion resistance can't be assessed by the loss in 

(A) Strength
(B) Thickness
(C) Weight
(D) Air permeability               Answer (D)

Q.21 Bleached cotton fabric was send to a laboratory for determination of Copper Number, which is an estimate of the presence of 

(A) Hydroxyl groups
(B) Carboxyl groups
(C) Reducing groups
(D) Oxidizing groups               Answer (C)

Q.22 Malachite Green is an important dyestuff. The typical green colour is obtained when the dye molecule is 

(A) Nonionic
(B) Cationic
(C) Anionic
(D) Made up of phenyl groups               Answer (B)


Q.23 A typical curve between equilibrium dye uptake and dying temperature goes through a maximum. After the maximum,the dye uptake decreases because

(A) Kinetic energy increases rapidly
(B) Pressure in the dye bath increases
(C) Saturation value is reached
(D) Dyeing is an exothermic process                          Answer (D)


Q.24 The efficacy of the wash-n-wear treatment can be estimated by measuring it's

(A) Bending length
(B) Tensile strength
(C) Dye uptake
(D) Crease Recovery                                        Answer (D)


Q.25 Softener reduces the bending rigidity of fabrics by decreasing

(A) Inter-fibre and inter-yarn friction
(B) Modules of the fibres
(C) Glass transition temperature of the fibre
(D) Packing coefficient of yarns                                    Answer (A)


Questions Q.26 TO Q.30 are numerical answer type. The answer to each of these questions is either a positive whole number, or a positive real number with maximum of 2 decimal places.

Q.26 The density of a given polyester filament is 1.38 g/cm3. Consider the density of fully crystalline polyester as 1.455 g/cm3 and that of fully amorphous polyester as 1.335 g/cm3. The percent crystallinity of the sampele is................................  
                                                                                                 Answer is 39 to 40

Q.27 Cleaning efficiency of the opening roller in a rotor spinning machine, having 56 mm diameter rotor, is 80%. The yarn breaks when the trash deposition within the rotor groove cosses the threshold of 1 mg/mm. If a sliver with 0.4% trash is fed at 7.5 g/min, the number of end breaks in 1 hr (to the nearest whole number) is.........................
                                                                                                                 Answer is 2

Q.28 In a projectile weaving machine the projectile travels a total distance of 250 cm at an average velocity of 25 m/s. If the time period during which it is in motion occupies half of the loom cycle, the maximum loom speed in picks per minute is....................
                                                                                                                         Answer is 300

Q.29 A 225 denier viscose yarn has a breaking strength of 7.5N. The yarn tenacity in cN/dtex is................
                   Answer is 3

Q.30 In an experiment, 1 gm each of the mercerized and unmercerized fabric samples are seperately treated in 30 ml of 0.25 N barium hydroxide solution for the required time. 10 ml of these solutions are drawn and titrated against 0.1 N HCl solution. The volumes of HCl consumed at the end of these titrations are m for mercerized and u for unmercerized  cases.If
Barium Activity Number (BAN) = [(b-m)/(b-u)]*100,
where m=18 ml, u=20 ml and b is the volume of HCl consumed in the blank titration, then the BAN value for the above mercerized sample is....................
                                                                                                  Answer is 140


Questions Q.31 to Q.55 are multiple choice type

Q.31 Consider the following Assertion [a] and Reason [r]

[a] M is an orthogonal matrix, but not a skew-symmetric matrix.

                               1          0             0
            M =            0       cosq        -sinq
                               0       sinq         cosq


 [r] Because M= M-1 and M≠ -M

Determine the correctness or otherwise of the above Assertion [a] and Reason [r]

(A) [a] is right [r] is wrong
(B) [a] is right [r] is right
(C) [a] is wrong [r] is right 
(D) [a] is wrong [r] is wrong                                      Answer (B)

Q.32 A beaker contains 50 cc of an aqueous dye solution of concentration c (w/v). 25 cc of this solution is removed and replaced by 25 cc of distilled water. This process is repeated five more times. The final concentration of the solution is
                                                               Answer is (C)
Q.33 Assume yhat the rate of evaporation of moisture from a wet fabric during drying process is proportional to the amount of moisture present in the fabric. If 50% of the moisture is evaporated in the first 5 minutes then the time (min) taken to evaporate 90% of the moisture is approximately

(A) 9
(B) 17
(C) 22
(D) 33                     Answer is (B)


Q.34 The number of neps in a card web follows Poisson DISTRIBUTION WITH A MEAN OF 100 per m2. The probability that there is no neps in an area of 645 cm2 is

(A) e-6.45
(B) e6.45
(C) e-645
(D) e645                     Answer is (A)

{In Q.34 objects value in decimals are in power of e}


Q.35 A yarn of 24 mm length has a varying cross-section. The values of the cross-sectional area of yarn (mm2), measured at equal intervals of 4 mm from one end are

  0.09,      0.12,       0.14,      0.15,       0.16,        0.13,        0.11

The volume of yarn (mm3) estimeted by using Simpson's 1/3 rule of numerical integration is

(A) 2.40
(B) 2.80
(C) 3.20
(D) 3.36                     Answer is (C)

Q.36 Match the property from Group I with the characterization technique from Group II.

Group I                                    Group II


P   Spherulite size                      1    Optical microscopy
Q   Degradation temperature     2    X-ray differaction      
R   Crystalline orientation         3    Differential scanning calorimetry              
S   Melting temperature             4    Thermogravimetric analysis

(A) P-2,Q-3,R-1,S-4
(B) P-2,Q-3,R-4,S-1
(C) P-1,Q-4,R-2,S-3
(D) P-2,Q-1,R-3,S-4                   
                                       Answer (C)


Q.37 Consider the following Assertion [a] and Reason [r]

[a] In the case of manufactured fibre spinning, a circular spinneret orifice always results in circular cross-section of filaments in melt spinning, but the same is not true in dry spinning.

[r] Melt spinning involves only heat transfer, whereas dry spinning involves heat as well as mass transfer.

Determine the correctness or otherwise of the above  Assertion [a] and Reason [r]

(A) [a] is right [r] is wrong
(B) [a] is right [r] is right
(C) [a] is wrong [r] is right
(D) [a] is wrong [r] is wrong
                                                 Answer (B)

Q.38 Consider the following assertion [a] and reason [r] in the context of the load elongation curves of fibre F1,F2 and F3.


[a] Fibre F3 is the most suitable fibre for making a rope for mountaineering.

[r] Mountaineering rope should have high tenacity, high modulus and high work of rupture.

Determine the correctness or otherwise of the above  Assertion [a] and Reason [r]

(A) [a] is right [r] is wrong
(B) [a] is right [r] is right
(C) [a] is wrong [r] is right
(D) [a] is wrong [r] is wrong
                                                 Answer (C)

Q.39 The winding speed  (difference between bobbin speed and traveller speed) of yarn in a ring frame is 200 rev/min. When bobbin diameter is 28 mm. If the bobbin diameter increased to 35 mm. The winding speed (rev/min) would be

(A) 140
(B) 160
(C) 180
(D) 200
                                   Answer (B)

Q.40 The weight of material on a roving bobbin is 2.4 kg. The roving hank is 600 tex. If delivery rate is 20 m/min,the time (min) required to build the bobbin is

(A) 180
(B) 190
(C) 200
(D) 210
                                              Answer (C)

Q.41 The terry towel fabric is a

(A) Warp pile structure with two series of warp and one series of weft yarn
(B) Weft pile structure with two series of warp and one series of weft yarn 
(C) Warp pile structure with two series of weft and one series of warp yarn
(D) Weft pile structure with two series of weft and one series of warp yarn
                                       Answer (A)

Q.42 Sizing of single cotton yarn leads to an increase in

(A) Strength and extensibility but decrease in bending rigidity and hairiness
(B) Strength and bending rigidity but decrease in extensibility and hairiness
(C) Strength and hairiness but decrease in extensibility and bending rigidity
(D) Bending rigidity and extensibility but decrease in strength and hairiness
                               Answer (B)

Q.43 The strength utilization of yarn in a woven fabric is

(A) Always more than 1.0 
(B) Always less than 1.0
(C) Always equal to 1.0
(D) Either more or less than 1.0
                                        Answer (D)

Q.44 Yarns Y1 and Y2 have the same strength when tested at 200 mm gauge length. If mass unevenness CV (%) of yarns Y1 and Y2 are 10 and 20 respectively, the ratio of the strength of yarns Y1 and Y2 when tested at 500 mm gauge length is 

(A) More than 1.0
(B) Less than 1.0
(C) Equal to 1.0
(D) Either more or less than 1.0
                                        Answer (A)


Q.45 Consider the following Assertion [a] and Reason [r]

[a] In the case of dyeing of cotton with reactive dyes, formation of hydrolyzed dye is a major problem.

[r] In an alkaline medium, the reactive dye reacts with the hydroxyl groups irrespective of whether these are from cellulose or water.

Determine the correctness or otherwise of the above  Assertion [a] and Reason [r]

(A) [a] is right [r] is wrong
(B) [a] is right [r] is right
(C) [a] is wrong [r] is right
(D) [a] is wrong [r] is wrong
                                                 Answer (B)


Q.46 Consider the following Assertion [a] and Reason [r]

[a] In case of durable press finishing of cotton fabrics, while the citric acid can be used as a cross-linking agent, oxalic acid can't be.

[r] The mechanism of cross-linking requires formation of anhydride in the intermediate step.

Determine the correctness or otherwise of the above  Assertion [a] and Reason [r]

(A) [a] is right [r] is wrong
(B) [a] is right [r] is right
(C) [a] is wrong [r] is right
(D) [a] is wrong [r] is wrong
                                                 Answer (B)


Q.47 Consider the following Assertion [a] and Reason [r]

[a] . In the case of minimum application technique, compared to the conventional rolls of a typical padding mangle, Roberto rolla substantially reduce the wet pick up.

[r] . The Roberto rolls are connected to vacuum pump to facilitate removal of liquor from the fabric.

Determine the correctness or otherwise of the above  Assertion [a] and Reason [r]

(A) [a] is right [r] is wrong
(B) [a] is right [r] is right
(C) [a] is wrong [r] is right
(D) [a] is wrong [r] is wrong
                                                 Answer (A)


Common Data Questions
Common Data for Questions 48 and 49:

Four polyester and four cotton carded slivers of the same count and mass CV of 4.16 % are drawn together keeping a draft of 8 on a breaker draw-frame. Two sliver from breaker draw-frame further drawn along with the four cotton carded slivers keeping a draft of 6 on a finisher draw-frame.

Q.48 The polyester (%) in the final sliver is approximately 

(A) 8
(B) 17
(C) 25
(D) 33
                                                 Answer (B)


Q. 49 The mass CV(%) of the final sliver approximately

(A) 0.6
(B) 1.24
(C) 1.86
(D) 2.33
                                                 Answer (D)

Common Data for Questions 50 and 51:

A fabric is woven from 38 tex yarns of 0.65 packing cofficient and 1.54 gm/cm3 fibre density. The fabric has 30 ends per cm and 25 picks per cm. Assume that warp is jammed.


Q. 50 The warp crimp (%) is approximately

(A) 0
(B) 5
(C) 10
(D) 15
                                                 Answer (D)

Q.51 The thickness of the above fabric (mm) is approximately 

(A) 0.05
(B) 0.25
(C) 0.50
(D) 0.75
                                                 Answer (C)


Linked Answer Questions
Linked Answer Questions 52 and 53

The thermal conductivity of a non-woven fabric is given by

l = 0.03 + 0.00005r+0.15

Where 1 is the thermal conductivity of the fabric in W/(m*K), r is the bulk density of the fabric in kg/m3, and  rÃŽ [10, 200] .

Q.52 Thermal conductivity is minimum when the bulk density is approximately

(A) 10
(B) 20
(C) 55
(D) 200
                            Answer (C)

Q.53 The minimum value of thermal conductivity, in W/(m*K), is approximately  

(A) 36
(B) 39
(C) 41
(D) 46
                            Answer (A)


Linked Answer Questions 54 and 55:

A cotton fibre of 180 militex has a density of 1.5 gm/cm3 and an average perimeter of 40 Âµm.

Q.54 The average area of the cell wall (µm2) is

(A) 80
(B) 100
(C) 120
(D) 140
                      Answer (C)

Q.55 The average  degree of thickening of cell wall is approximately

(A) 0.84
(B) 0.89
(C) 0.94
(D) 0.99
                      Answer (C)

II Part General Aptitude

General Aptitude (GA) Questions

Q.56 to 60 carry one mark each

Q. 56 Which one of the following options is the closest in meaning to the word given below?

             Pacify

(A) Excite
(B) Soothe
(C) Deplete
(D) Tire
                       Answer (B)

Q.57 Choose the most appropriate pair of words from the options given below to complete the following sentence:

The high level of ............... of the questions in the test was ............... by an increase in the period of time alloted for answering them.

(A) difficulty, compensated
(B) exactitude, magnified
(C) aptitude, decreased
(D) attitude, mitigated
                                     Answer (A)


Q.58 Choose the grammatically Correct sentence:

(A) He laid in bed till 8 o'clock in the morning
(B) He layed in bed till 8 o'clock in the morning
(C) He lain in bed till 8 o'clock in the morning
(D) He lay in bed till 8 o'clock in the morning
                                Answer (D)

Q.59 Which one of the parts (A,B,C,D) in the sentence contains an ERROR?

No sooner had the doctor seen the results of the blood test, than he suggest the patient ti see the specialist. 

(A) no sooner had
(B) results of the blood test
(C) suggested the patient
(D) see the specialist
                              Answer (C)

Q.60 Ten teams participate in a tournament. Every team plays each of the other teams twice. The total number of matches to be played is

(A) 20
(B) 45
(C) 60
(D) 90
                           Answer (D)

Q.61 - Q.65 carry two marks each

Q.61 A value of x that satisfies the equation log x + log (x – 7) = log (x + 11) + log 2 is

(A) 1
(B) 2
(C) 7
(D) 11
                       Answer (D)

Q.62 Let f(x) = x-[x],where x ≥ 0 and [x] is the greatest integer not larger than x. Then f(x) is a

(A) monotonically increasing function
(B) monotonically decreasing function
(C) linearly increasing function between two integers
(D) linearly decreasing function between two integers
                               Answer (C)

Q.63 Ravi is taller than Arun but shorter than Iqbal. Sam is shorter than Ravi. Mohan is shorter than Arun.Balu is taller than Mohan and Sam.The tallest person can be

(A) Mohan
(B) Ravi
(C) Balu
(D) Arun
                       Answer (C)

Q.64 A smuggler has 10 capsules in which five are filled with narcotic drugs and the rest contain the original medicine. All the 10 capsules are mixed in a single box, from which the customs officials picked two capsules at random and tested for the presence of narcotic drugs. The probability that the smuggler will be caught is

(A) 0.50
(B) 0.67
(C) 0.78
(D) 0.82
                       Answer (C)

Q.65 The documents expose the cynicism of the government officials - and yet as the media website reflects, not a single newspaper has reported on their existence.

Which one of the following inferences may be drawn with the greatest accuracy from the above passage?

(A) Nobody other then the government officials knew about the existence of the documents.
(B) Newspapers did report about the documents but nobody cared.
(C) Media reports did not show the existence of the documents.
(D) The documents reveal the attitude of the government officials.
                       Answer (D)

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