Carding and Combing - Yarn Manufacture, Yarn Structure and Properties - Textile Engineering & Fibre Science Previous Year Questions

1

2007 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2007

On a carding machine

A

Doffer wire point height is more than that of cylinder

B

Doffer wire point height is less than that of cylinder

C

Doffer and cylinder wire point heights are the same

D

Doffer and taker-in wire point heights are the same

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2

2008 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2008

When the doffer of a card fed by chute feed system is stopped

A

Accelerating flaps close

B

Separating flaps open

C

Differential pressure regulator stops working

D

Exhaust flaps close

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3

2008 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2008

In a card, theoretically it is beneficial to have smaller cylinder running at higher rpm because it
P     Results in saving of space
Q     Improves carding action
R     Increases carding area
S     Improves fibre transfer from licker-in to cylinder
Choose the correct combination from amongst the alternatives A, B, C and D.

A

P, Q

B

Q, R

C

R, S

D

Q, S

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4

2009 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2009

The count of card sliver (Ne) will be approximately

A

0.16

B

0.15

C

0.14

D

0.13

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5

2009 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2009

If the total draft in the card is decreased by 10%, the sliver linear density in ktex will be

A

6.4

B

5.4

C

4.4

D

3.4

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6

2010 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2010

In which of the following regions of a carding machine, the fibre alignment is disturbed to the maximum extent?

A

Cylinder to doffer transfer region

B

Licker-in to cylinder transfer region

C

Cylinder to cylinder under-casing region

D

Cylinder to flats carding region

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7

2011 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2011

The total draft of the card is

A

71

B

140

C

100

D

171

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8

2011 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2011

If the doffer speed is 50 rpm, the approximate production rate of the card in kg/h would be

A

6

B

22

C

31

D

88

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9

2013 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2013

Fibre individualization in a card will increase by increasing

A

Licker-in to cylinder setting

B

Doffer speed

C

Licker-in speed

D

Cylinder speed

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10

2013 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2013

In a card the probability of fibre transfer from cylinder to doffer in one revolution of cylinder is 0.2. The probability that a particular fibre will be transferred to the doffer within the first three revolutions of cylinder is ________.

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11

2013 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2013

The speed of the comber in nips/min is

A

325

B

350

C

375

D

400

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12

2014 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2014

In a cotton card, the wire point density on

A

Cylinder is lesser than that on flat

B

Doffer is greater than that on cylinder

C

Cylinder is greater than that on flat

D

Flat is greater than that on doffer

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13

2014 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2014

The combing force increases with

A

Decrease in mass/unit length of lap

B

Decrease in pre-combing draft

C

Decrease in needles/cm on half lap

D

Decrease in nips per minute

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14

2015 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2015

In a cotton comber, noil extraction increases

A

With a decrease in detachment setting

B

With an increase in pre-combing draft

C

If majority of hooks are presented in leading direction

D

With an increase in short fibres

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15

2016 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2016

In a carding machine, in which of the following zones the fibre alignment is negatively affected to the maximum extent?

A

Cylinder to flats carding region

B

Licker-in to cylinder transfer region

C

Cylinder to doffer transfer region

D

Doffer to calendar roller region

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16

2016 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2016

The rotational speed of a card cylinder with locally damaged card clothing is 400 rpm and the sliver delivery rate is 100 m/min. The wavelength (m) of the periodic mass variation in the card sliver is __________

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17

2017 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2017

Keeping card production same, the quality of carding will improve by setting

A

Higher doffer rpm and coarser sliver hank

B

Higher doffer rpm and finer sliver hank

C

Lower doffer rpm and coarser sliver hank

D

Lower doffer rpm and finer sliver hank

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18

2017 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2017

In cotton combing process, the counter-feed system gives

A

Low removal of noil and low elimination of impurities

B

Low removal of noil and high elimination of impurities

C

High removal of noil and low elimination of impurities

D

High removal of noil and high elimination of impurities

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19

2018 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2018

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
[a]: In a carding machine, carding type of wire point configuration is used between cylinder and doffer.
[r]: Carding type of wire point configuration gives the best fibre transfer without disturbing the fibre alignment.

A

Both [a] and [r] are true and [r] is the correct reason for [a]

B

Both [a] and [r] are true but [r] is not the correct reason for [a]

C

Both [a] and [r] are false

D

[a] is true but [r] is false

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20

2018 · Textile Engineering & Fibre Science · Yarn Manufacture, Yarn Structure and Properties · Carding and Combing

Textile Engineering & Fibre Science (TF) 2018

An eight head comber is running at 400 nips/min. The lap fed is 60 kilotex and noil extracted is 20%. If the feed/nip is 7 mm, then with machine utilization of 80%, the production rate (in kg/h), accurate to one decimal place, is ______

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