Basic Viva For Textile Engineers (Fabric Related) Part-8

 

211. What are the types of loom?

Ans.

Hand loom &

Power loom

212. What are the types of power loom?

Ans.

Modern/shuttle less loom &

Conventional/shuttle loom.

213. What is picking?

Ans. To propel the shuttle or any other weft inserting elements.

214. Write down the faults of picking

Ans.

Early picking

Late picking

Smash or Bang-off

Short picking

Harsh picking

Shuttle flying out

215. Some meaning

Ans.

PPM = picks per minute

PPI = picks per inch

EPI = Ends per inch

RS = Reed space

216. Actual production of a m/c is always less than that calculated production (True/False)

Ans. True

217. What is the object of beat-up mechanism?

Ans. To push the newly inserted weft yarn (last pick) to the fell of the cloth.

218. What is the function of take-up mechanism?

Ans. To wind the already woven fabric on the cloth roller with the progress of weaving.

219. What is pick spacing?

Ans. The space occupied by a pick in fabric

220. What is let-off mechanism?

Ans. To unwind the equivalent length of warp sheet from the warp beams with the progress of take-up during weaving.

221. What are the basic weave structures?

Ans. (i) Plain (ii) Twill and (iii) Satin

222. Write down/Classify the types of sett.

Ans.

Warp sett (No. of warp/inch)

Weft sett (no. of weft/inch)

223. What is weave?

Ans. Interlacement of the ends and picks with each other produces a coherent structure. The repeating pattern of interlacing is called the weave.

224. What is warp & weft crimp?

Ans. The waviness of the yarns due to interlacing of warp and weft in producing fabric is called crimp.

225. What is face loop?

Ans. The loop where heads are below and hanks are above is called face loop.

226. What is back loop?

Ans. The loop where heads are above and hanks are below is called back loop.

227. What is the basic knitted structure?

Ans.

single jersey or plain

1x1 rib

1x1 inter lock

1x1 purl.

228. Write down the weft knitting elements.

Ans.

Needle

Sinker

Cam

229. Write down the types of needle.

Ans.

Latch needle

Bearded needle

Compound needle

230. Write down the types of knit wear.

Ans.

Cut and sew knit wear

Fully fashion knit wear.

231. Write down the basic stitches of knitting structure.

Ans.

Knit stitch

Miss/ float stitch

Tuck stitch

232. How can you identify single jersey fabric?

Ans. In single jersey fabrics, all face loops are present in one side and all back loops are present in other side of the fabric.

233. How can you identify double jersey fabric?

Ans. In double jersey fabrics, face & back loops are present in every side of the fabric.

234. The size of held loop is always bigger than knit loop (yes/no).

Ans. Yes.

235. Write down the warp knitting elements.

Ans.

Needle

Cam

Sinker

236. Needle individually works in which knitting?

Ans. Weft knitting m/c.

237. Needles work unitedly in warp knitting (yes/no).

Ans. Yes.

238. What is pitch?

Ans. The distance between one needle and another.

239. Technical face and back is of same in rib structure (yes/no).

Ans. Yes.

240. What is a coarse?

Ans. A coarse is a predominantly horizontal row of needle loops.