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Textile Engineering Gate 2012 Questions with Answer

Ques 1 GATE 2012

Consider the following Assertion [a] and Reason [r]
[a] M is an orthogonal matrix, but not a skew-symmetric matrix.

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


(b) is the correct answer.

Ques 2 GATE 2012

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

A

c

B

c(1/2)5

C

c(1/2)6

D

c(1/2)7


(c) is the correct answer.

Ques 3 GATE 2012

The number of neps in a carded web follows Poisson distribution with a mean of 100 per m². The probability that there is no nep in an area of 645 cm² is

A

e-6.45

B

e6.45

C

e-645

D

e645


(a) is the correct answer.

Ques 4 GATE 2012

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) estimated by using Simpson's 1/3 rule of numerical integration is

A

2.40

B

2.80

C

3.20

D

3.36


(c) is the correct answer.

Ques 5 GATE 2012

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


(d) is the correct answer.

Ques 6 GATE 2012

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


(c) is the correct answer.

Ques 7 GATE 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


(c) is the correct answer.

Ques 8 GATE 2012

In the context of thermal bonding of nonwoven 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


(d) is the correct answer.

Ques 9 GATE 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


(300) is the correct answer.

Ques 10 GATE 2012

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


(a) is the correct answer.

Ques 11 GATE 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


(b) is the correct answer.

Ques 12 GATE 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


(c) is the correct answer.

Ques 13 GATE 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 thickness of the above fabric (mm) is approximately

A

0.05

B

0.25

C

0.50

D

0.75


(b) is the correct answer.

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