Numerical Computation and Estimation - General Aptitude - General Aptitude (GA) Previous Year Questions

1

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

The fibre that will float on water is

A

Nylon

B

Polyester

C

Acrylic

D

Polypropylene

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2

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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

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3

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

In a card, the wire point density is maximum on

A

Cylinder

B

Flat

C

Doffer

D

Licker-in

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4

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

Size add-on does not depend on

A

Roller hardness

B

Drying cylinder temperature

C

Size paste concentration

D

Machine speed

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5

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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

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6

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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

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7

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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

A

0

B

5

C

10

D

15

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8

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

A typical curve between equilibrium dye uptake and dyeing 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

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9

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

The density of a given polyester filament sample 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 sample is ______.

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10

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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 crosses 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 ______.

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11

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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

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12

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

In an experiment, 1 g each of the mercerized and unmercerized fabric samples are separately treated in 30 ml of 0.25N barium hydroxide solution for the required time. 10 ml of these solutions are drawn and titrated against 0.1N 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 ______.

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13

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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

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14

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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

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15

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

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 drawframe. Two slivers from breaker drawframe are further drawn along with the four cotton carded slivers keeping a draft of 6 on a finisher drawframe. The polyester (%) in the final sliver is approximately

A

8

B

17

C

25

D

33

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16

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

A fabric is woven from 38 tex yarns of 0.65 packing coefficient and 1.54 g/cm³ fibre density. The fabric has 30 ends per cm and 25 picks per cm. Assume that warp is jammed. The weft crimp (%) is approximately

A

0

B

5

C

10

D

15

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17

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

The minimum value of thermal conductivity, in mW/(m·K), is approximately

A

36

B

39

C

41

D

46

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18

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

A cotton fibre of 180 millitex has a density of 1.5 g/cm³ and an average perimeter of 40 μm. The average area of the cell wall (μm²) is

A

80

B

100

C

120

D

140

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19

2012 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2012

The average degree of thickening of cell wall is approximately

A

0.84

B

0.89

C

0.94

D

0.99

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20

2015 · General Aptitude (GA) · General Aptitude · Numerical Computation and Estimation

Textile Engineering & Fibre Science (TF) 2015

The yarn tenacity (gf/tex) measured in lea form, compared to that measured in single yarn form is

A

Always lower

B

Always higher

C

Always equal

D

Higher or lower depending on yarn count

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