Basic Viva For Textile Engineers (Fabric Related) Part-11

 

301. What are the reason of clothing?

Ans.

Modesty

Protection against adverse climate conditions

Adornment

Identification

Aristocratic reason

302. What the breaks that used to stop the loom?

Ans.

Mechanical

Pneumatic (used air)

Hydraulic (used liquid)

303. Some important terms -

* The ratio of RPM of crank shaft and bottom shaft is always 2:1

** RPM of crank shaft = PPM of the loom

304. Can we mount more than two shedding tappet in a loom?

Ans. No

305. What is dwell?

Ans. The stationary period of heald frames in open shed condition during which time, the shuttle travel from one side of the loom to the other side.

306. How many heald frames can be controlled by Dobby shedding mechanism?

Ans. Theoretically maximum 48 but practically 36 can be controlled. But for cotton yarn weaving 24 controlled.

307. Minimum how many heald frame is controlled by Dobby shedding?

Ans. Minimum 12.

308. Maximum how many heald frame is controlled by Jacquard shedding?

Ans. 1800

309. What is efficiency?

Ans. The weaving efficiency describes how effectively a set of looms work in normal working environment.

310. What is bastard reed?

Ans: A reed in which dent space at each side is slightly greater than in the center.

311. What is flat bed?

Ans: A bed which provides a flat surface in a same pane as the table in which it is mounted.

312. What is Brocade?

Ans: A woven, patterned fabric using multi-colored threads

313. What is Damask?

Ans: It is similar to brocade but is finer, thiner. A woven, patterned fabric, using all one color - think fancy white cloth napkins. Usually silk, linen, cotton, rayon or synthetic blends.

314. What is voile?

Ans: Soft fine sheer fabric.

315. What is worsted?

Ans: Fine closely-woven wool.