Drawing and Doubling - Yarn Manufacture, Yarn Structure and Properties - Textile Engineering & Fibre Science Previous Year Questions

Six slivers are doubled together and given three passages on drawframe. The number of doublings is

Placing a condenser in the drafting zone leads to increase in

Eight ends of slivers, each having a CV of 6%, are doubled and drawn to produce the resultant sliver of same hank. If the drawframe introduces 2.12% CV, the CV% of resultant sliver would be approximately

Quasi-periodic irregularity of slivers is caused by

Pressure field from the nip of drafting roller can be extended by

A 5 cm long filament is drawn to 20 cm. The draw ratio is

Pressure bar is provided in a draw frame to

The following has the highest Index of Irregularity

During roller drafting, better fibre control is achieved by flexing the fibre strand over the bottom roller. The reason for this is

A machine that does not improve the mass evenness is

Softer cots on drafting rollers result in

In a drawframe with 3 over 3 drafting system, the roller most prone to slip is

Fibre parallelization in drawn sliver improves with

Which of the following is the correct sequence of events which happen in a roller drafting zone?

Six carded slivers of 4 ktex each are drawn to produce a sliver of 5 ktex. The draft required (rounded off to 1 decimal place) is __________.

A drawframe with a 3 over 3 drafting arrangement, having an eccentric bottom middle roller of 28 mm diameter, is used to produce a sliver. The back zone and front zone drafts are 1.7 and 3.5, respectively. The sliver is further given a draft of 200 to produce a yarn. The wavelength (m) of the periodic fault in the yarn approximately is