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Textile Engineering Gate 2009 Questions with Answer

Ques 27 GATE 2009

Ten thousand metre of polyester fabric is to be dyed to 2% depth of shade by continuous method. The width of the fabric is 1.5 m and mass per unit area is 200 g/m². Assume the specific gravity of the dye liquor to be 1.0 and a wet pickup of 80% after padding. The volume of the liquor in litres used on the fabric would be

A

2000

B

2400

C

2800

D

3200


(b) is the correct answer.

Ques 28 GATE 2009

Jute, flax and ramie belong to the family of

A

Hair fibres

B

Bast fibres

C

Leaf fibres

D

Fruit fibres


(b) is the correct answer.

Ques 29 GATE 2009

The moisture regain (%) of nylon fibre is in the range

A

2.0-3.0

B

3.5-4.5

C

5.0-6.0

D

6.5-7.5


(b) is the correct answer.

Ques 30 GATE 2009

The density of polyester fibre is

A

More than that of cotton

B

More than that of nylon but less than that of cotton

C

Same as that of nylon

D

More than that of polypropylene but less than that of nylon


(d) is the correct answer.

Ques 31 GATE 2009

The group of fibres produced by solution spinning is

A

Viscose and polyamide

B

Viscose and acrylic

C

Polyester and acrylic

D

Polyamide and acetate


(b) is the correct answer.

Ques 32 GATE 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

0.9-1.0


(c) is the correct answer.

Ques 33 GATE 2009

Consider the fibres in Group I and the corresponding monomer(s) in Group II. Choose the correct combinations from amongst A, B, C and D.

Group I Group II
P. Polyester (PET) 1. HO-(CH₂)₂-OH, HOOC-COOH
Q. Nylon 6 6. H₂N-(CH₂)₅-COOH
R. Nylon 6,6 3. HOOC-(CH₂)₆-COOH, H₂N-(CH₂)₆-NH₂
S. Acrylic 2. CH₂=CH.CN, CH₂=CH.COOCH₃

A

P-4, Q-1, R-5, S-3

B

P-2, Q-6, R-5, S-1

C

P-2, Q-6, R-3, S-4

D

P-3, Q-2, R-5, S-1


(b) is the correct answer.

Ques 34 GATE 2009

With increase in relative humidity from 0 to 100%, the tensile properties of cotton fibre change such that

A

Modulus and strength increase, extensibility decreases

B

Modulus decreases, strength and extensibility increase

C

Modulus and strength decrease, extensibility remains same

D

Modulus and strength decrease, extensibility increases


(d) is the correct answer.

Ques 35 GATE 2009

On drawing and heat setting, the properties of synthetic fibres change such that

A

Modulus and tenacity increase, extensibility decreases

B

Modulus increases, tenacity and extensibility decrease

C

Modulus, tenacity as well as extensibility increase

D

Modulus and tenacity increase, extensibility remains same


(a) is the correct answer.

Ques 36 GATE 2009

Length of 2 kg of 180 denier polyester yarn is

A

90 km

B

100 km

C

180 km

D

360 km


(b) is the correct answer.

Ques 37 GATE 2009

Nep setting on evenness tester is related to the percent mass deviation based on yarn length of

A

10 mm

B

8 mm

C

4 mm

D

1 mm


(c) is the correct answer.

Ques 38 GATE 2009

The value of breaking length in km (RKM) of a yarn is numerically equal to

A

Tenacity in N/tex

B

Breaking load in N

C

Tenacity in gf/tex

D

Breaking load in gf


(c) is the correct answer.

Ques 39 GATE 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.

Group I Group II
P. Thermogravimetry (TGA) 3. Degradation temperature
Q. Differential Scanning Calorimetry (DSC) 4. Melting and crystallization temperature
R. X-Ray Diffraction 2. Crystallinity
S. Polarizing Optical Microscopy 1. Birefringence

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


(c) is the correct answer.

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