FABRIC MANUIFACTURE - I

(MCQ : MODULE 11 - SECONDARY MOTIONS )

 

Question 1: Restarting a loom after the overnight stoppage will have

Higher than set pick spacing at start
Lower that set pick spacing at start
Same as set pick spacing at start
Sometimes higher but mostly lower pick spacing than set pick spacing at start

Question 2: The problem of periodicity in pick spacing is critical if wavelength is

Smaller than 1/8 inch
Greater than 10 inch
In between 1/8 and 10 inch
In between 10 inch to 100 inch

Question 3: Determine the correctness or otherwise of the following assertion [a] and the reason [r]

Assertion: The positive let-off motion maintains the free length of warp and the tension in warp sheet at constant levels.

Reason: The fluctuation of free warp length due to take-up causes change in warp tension, which is sensed by the system, and correction in both warp tension and in free warp length is carried out through the let-off system automatically

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

Question 4: Weaving of heavy fabrics on wide looms is carried out preferably with a positive take-up motion of the type

Continuous indirect
Continuous direct
Intermittent indirect
Intermittent direct

Question 5: Tick the wrong statement

In seven wheel take up motion, PPI = Change wheel tooth number/1.015
In Shirley take up motion, PPI = Change wheel tooth number
In Picanol take up motion, PPcm= Change wheel tooth number
In negative take up motion, sley does not have any role

Question 6: Warp tension during weaving is maintained by

Take up mition
Let-off motion
Warp stop motion
Drop wires

Question 7: In negative let off motion, the weights have to shifted

At smaller time interval as the weaver’s beam radius reduces
At larger time interval as the weaver’s beam radius reduces
At constant time interval as the weaver’s beam radius reduces
Depending on the full weaver’s beam diamter

Question 8: Bang-off is associated with

Fast reed warp protection
Loose reed warp protection
Warp stop motion
Side weft fork motion

Question 9: In case of weft break, center weft fork motion would stop the loom

Two picks after the weft break
One pick after the weft break
After the weft break but before the beat up
At the instance of weft break

Question 10: A large slot is kept in the drop wires used for warp stop motion

For the passage of the warp yarns
For the passage of the reciprocating bars
For the passage of the warp yarns and reciprocating bars
To control the warp tension.

 

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