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

1

2012 · General Aptitude (GA) · 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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2

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

Textile Engineering & Fibre Science (TF) 2012

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 ______.

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3

2012 · General Aptitude (GA) · 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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4

2012 · General Aptitude (GA) · 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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5

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

Textile Engineering & Fibre Science (TF) 2012

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 is increased to 35 mm, the winding speed (rev/min) would be

A

140

B

160

C

180

D

200

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6

2012 · General Aptitude (GA) · 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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7

2012 · General Aptitude (GA) · 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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8

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

Textile Engineering & Fibre Science (TF) 2012

The thermal conductivity of a nonwoven fabric is given by \[ \lambda = 0.03 + 0.00005\rho + \frac{0.15}{\rho} \] where \(\lambda\) is the thermal conductivity of the fabric in W/(m·K), \(\rho\) is the bulk density of the fabric in kg/m³, and \(\rho \in [0,200]\). Thermal conductivity is minimum when the bulk density is approximately

A

10

B

20

C

55

D

200

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9

2012 · General Aptitude (GA) · 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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