Question

The multiple weft insertion mechanism is used in __________ loom.

• A. rapier
• B. air jet
• C. projectile
• D. multiphase

Hint:

Most looms work like a single-lane road (one car at a time), but a multiphase loom is like an 8-lane highway with many cars (weft picks) moving at once.

Answer 1

The Correct Option is D

Concept: Conventional and most modern shuttleless looms (Rapier, Air-jet, Water-jet, Projectile) are "single-phase" looms, meaning they insert one weft pick at a time across the entire width of the fabric.

Step 1: Defining Multiphase Weaving.
A multiphase loom is designed to increase productivity significantly by having several sheds open simultaneously across the warp.

Step 2: Identifying Multiple Insertion.
Because multiple sheds are active at once, the machine can utilize a multiple weft insertion mechanism, where several weft carriers or jets are traveling through different parts of the warp at the same time. This allows for extremely high weft insertion rates compared to single-phase looms.