Fibre Testing - Textile Testing - Textile Engineering & Fibre Science Previous Year Questions

1

2007 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2007

Uniformity ratio (%) of cotton is in the range of

A

40-50

B

60-70

C

80-90

D

90-100

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2

2007 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2007

Choose the INCORRECT statement from the following

A

Thermal stability of fibres can be measured by thermo-gravimetric analysis

B

Orientation of crystalline regions can be measured by optical microscopy

C

Crystallinity of fibres can be measured by differential scanning calorimetry

D

Crystallinity of fibres can be measured by X-ray diffraction

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3

2007 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2007

With respect to the typical tensile behaviour of polyester multifilament yarns

A

Increase in the rate of testing leads to increase in initial modulus

B

Increase in temperature of testing leads to increase in strength

C

Increase in moisture regain leads to increase in initial modulus

D

Increase in temperature of testing leads to increase in initial modulus

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4

2007 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2007

A polypropylene cord has estimated breaking length of approximately 60 km in air. The estimated breaking length of the cord in water would be

A

0 km

B

60 km

C

180 km

D

\(\infty\)

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5

2007 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2007

With 500 mm specimen length, strain rate (% per min) on a tensile tester with 5m/min jaw speed would be

A

500

B

1000

C

5000

D

10000

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6

2007 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2007

If 1.2 denier fibre is tested in place of 1.5 denier fibre, the percentage change in the flow rate would be

A

20

B

30

C

40

D

50

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7

2007 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2007

Change in the total length of fibre in meters packed in the plug, when 1.5 denier fibre is replaced with 1.2 denier fibre, would be

A

5000

B

7500

C

10000

D

12500

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8

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

Uniformity ratio is the ratio of

A

50% span length and 2.5% span length

B

2.5% span length and 50% span length

C

Mean length and upper half mean length

D

Upper half mean length and mean length

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9

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

The characteristics wave form produced by light scattered by individual fibres in an AFIS instrument is

A

Spiked

B

Triangular

C

Rectangular

D

Elliptical

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10

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

The decreasing order of variation in tensile properties of fibres and corresponding yarns and fabrics is

A

Fibre, Yarn, Fabric

B

Yarn, Fabric, Fibre

C

Fabric, Fibre, Yarn

D

Yarn, Fibre, Fabric

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11

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

A ternary mixture of cotton, acrylic and polyester is treated in warm sulfuric acid 75% (w/w). The fibres that will dissolve are

A

All the three

B

Cotton and polyester

C

Acrylic and polyester

D

Cotton and acrylic

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12

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

The change in \"machine rate of load\" (kgf/cm) as pendulum lever swings by 30 degrees from its normal position, is

A

100

B

173.2

C

346.4

D

400

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13

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

The time required to break the sample in seconds is

A

3.7

B

4.3

C

5.2

D

6.3

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14

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

The nominal denier of the single filament is

A

12

B

9

C

6

D

3

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15

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

The resultant denier of the fibre would be

A

4.5

B

3.0

C

2.0

D

1.0

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16

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

The maturity ratio is

A

0.6

B

0.7

C

0.8

D

0.9

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17

2008 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2008

If the number of matured fibres increases by 10% with number of thin walled fibres remaining the same, the percent increase in maturity ratio would be

A

5.6

B

6.6

C

8.3

D

10

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18

2009 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2009

Uniformity ratio for normal variety of cotton is in the range

A

0.2 - 0.3

B

0.4 - 0.5

C

0.7 - 0.8

D

9.0 - 1.0

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19

2009 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2009

Consider the fibre characterization techniques in Group I used to test the physical properties in Group II. Choose the correct combinations from amongst A, B, C and D.

A

P-4, Q-3, R-2, S-1

B

P-3, Q-2, R-1, S-4

C

P-3, Q-4, R-2, S-1

D

P-3, Q-4, R-1, S-2

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20

2010 · Textile Engineering & Fibre Science · Textile Testing · Fibre Testing

Textile Engineering & Fibre Science (TF) 2010

30 bales of 3.5 Mf and 40 bales of 4.0 Mf cotton fibres (Mf is Micronaire value of cotton fibres) are already available in the raw material inventory of the mill. What is the approximate Mf value required of another 30 bales so that the resultant mean Mf of the total 100 bales will be 4.0?

A

3.4

B

4.7

C

5.2

D

6.0

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